mirror of
https://github.com/golang/go
synced 2024-10-05 10:21:22 -06:00
e1ee3b5db6
This CL makes reflect require that values be assignable to the target type in exactly the same places where that is the rule in Go. It also adds the Implements and AssignableTo methods so that callers can check the types themselves so as to avoid a panic. Before this CL, reflect required strict type identity. This CL expands Call to accept and correctly marshal arbitrary argument lists for variadic functions; it introduces CallSlice for use in the case where the slice for the variadic argument is already known. Fixes #327. Fixes #1212. R=r, dsymonds CC=golang-dev https://golang.org/cl/4439058
1470 lines
32 KiB
Go
1470 lines
32 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package reflect_test
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import (
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"bytes"
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"container/vector"
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"fmt"
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"io"
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"os"
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. "reflect"
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"runtime"
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"testing"
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"unsafe"
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)
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type integer int
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type T struct {
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a int
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b float64
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c string
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d *int
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}
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type pair struct {
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i interface{}
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s string
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}
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func isDigit(c uint8) bool { return '0' <= c && c <= '9' }
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func assert(t *testing.T, s, want string) {
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if s != want {
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t.Errorf("have %#q want %#q", s, want)
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}
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}
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func typestring(i interface{}) string { return Typeof(i).String() }
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var typeTests = []pair{
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{struct{ x int }{}, "int"},
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{struct{ x int8 }{}, "int8"},
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{struct{ x int16 }{}, "int16"},
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{struct{ x int32 }{}, "int32"},
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{struct{ x int64 }{}, "int64"},
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{struct{ x uint }{}, "uint"},
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{struct{ x uint8 }{}, "uint8"},
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{struct{ x uint16 }{}, "uint16"},
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{struct{ x uint32 }{}, "uint32"},
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{struct{ x uint64 }{}, "uint64"},
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{struct{ x float32 }{}, "float32"},
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{struct{ x float64 }{}, "float64"},
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{struct{ x int8 }{}, "int8"},
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{struct{ x (**int8) }{}, "**int8"},
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{struct{ x (**integer) }{}, "**reflect_test.integer"},
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{struct{ x ([32]int32) }{}, "[32]int32"},
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{struct{ x ([]int8) }{}, "[]int8"},
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{struct{ x (map[string]int32) }{}, "map[string] int32"},
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{struct{ x (chan<- string) }{}, "chan<- string"},
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{struct {
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x struct {
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c chan *int32
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d float32
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}
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}{},
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"struct { c chan *int32; d float32 }",
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},
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{struct{ x (func(a int8, b int32)) }{}, "func(int8, int32)"},
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{struct {
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x struct {
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c func(chan *integer, *int8)
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}
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}{},
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"struct { c func(chan *reflect_test.integer, *int8) }",
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},
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{struct {
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x struct {
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a int8
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b int32
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}
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}{},
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"struct { a int8; b int32 }",
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},
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{struct {
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x struct {
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a int8
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b int8
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c int32
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}
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}{},
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"struct { a int8; b int8; c int32 }",
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},
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{struct {
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x struct {
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a int8
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b int8
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c int8
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d int32
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}
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}{},
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"struct { a int8; b int8; c int8; d int32 }",
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},
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{struct {
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x struct {
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a int8
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b int8
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c int8
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d int8
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e int32
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}
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}{},
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"struct { a int8; b int8; c int8; d int8; e int32 }",
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},
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{struct {
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x struct {
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a int8
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b int8
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c int8
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d int8
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e int8
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f int32
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}
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}{},
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"struct { a int8; b int8; c int8; d int8; e int8; f int32 }",
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},
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{struct {
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x struct {
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a int8 "hi there"
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}
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}{},
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`struct { a int8 "hi there" }`,
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},
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{struct {
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x struct {
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a int8 "hi \x00there\t\n\"\\"
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}
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}{},
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`struct { a int8 "hi \x00there\t\n\"\\" }`,
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},
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{struct {
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x struct {
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f func(args ...int)
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}
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}{},
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"struct { f func(...int) }",
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},
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{struct {
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x (interface {
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a(func(func(int) int) func(func(int)) int)
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b()
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})
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}{},
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"interface { a(func(func(int) int) func(func(int)) int); b() }",
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},
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}
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var valueTests = []pair{
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{new(int8), "8"},
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{new(int16), "16"},
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{new(int32), "32"},
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{new(int64), "64"},
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{new(uint8), "8"},
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{new(uint16), "16"},
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{new(uint32), "32"},
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{new(uint64), "64"},
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{new(float32), "256.25"},
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{new(float64), "512.125"},
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{new(string), "stringy cheese"},
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{new(bool), "true"},
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{new(*int8), "*int8(0)"},
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{new(**int8), "**int8(0)"},
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{new([5]int32), "[5]int32{0, 0, 0, 0, 0}"},
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{new(**integer), "**reflect_test.integer(0)"},
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{new(map[string]int32), "map[string] int32{<can't iterate on maps>}"},
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{new(chan<- string), "chan<- string"},
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{new(func(a int8, b int32)), "func(int8, int32)(0)"},
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{new(struct {
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c chan *int32
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d float32
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}),
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"struct { c chan *int32; d float32 }{chan *int32, 0}",
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},
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{new(struct{ c func(chan *integer, *int8) }),
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"struct { c func(chan *reflect_test.integer, *int8) }{func(chan *reflect_test.integer, *int8)(0)}",
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},
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{new(struct {
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a int8
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b int32
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}),
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"struct { a int8; b int32 }{0, 0}",
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},
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{new(struct {
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a int8
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b int8
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c int32
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}),
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"struct { a int8; b int8; c int32 }{0, 0, 0}",
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},
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}
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func testType(t *testing.T, i int, typ Type, want string) {
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s := typ.String()
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if s != want {
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t.Errorf("#%d: have %#q, want %#q", i, s, want)
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}
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}
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func TestTypes(t *testing.T) {
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for i, tt := range typeTests {
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testType(t, i, NewValue(tt.i).Field(0).Type(), tt.s)
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}
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}
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func TestSet(t *testing.T) {
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for i, tt := range valueTests {
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v := NewValue(tt.i).Elem()
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switch v.Kind() {
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case Int:
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v.SetInt(132)
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case Int8:
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v.SetInt(8)
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case Int16:
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v.SetInt(16)
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case Int32:
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v.SetInt(32)
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case Int64:
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v.SetInt(64)
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case Uint:
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v.SetUint(132)
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case Uint8:
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v.SetUint(8)
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case Uint16:
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v.SetUint(16)
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case Uint32:
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v.SetUint(32)
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case Uint64:
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v.SetUint(64)
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case Float32:
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v.SetFloat(256.25)
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case Float64:
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v.SetFloat(512.125)
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case Complex64:
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v.SetComplex(532.125 + 10i)
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case Complex128:
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v.SetComplex(564.25 + 1i)
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case String:
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v.SetString("stringy cheese")
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case Bool:
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v.SetBool(true)
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}
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s := valueToString(v)
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if s != tt.s {
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t.Errorf("#%d: have %#q, want %#q", i, s, tt.s)
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}
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}
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}
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func TestSetValue(t *testing.T) {
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for i, tt := range valueTests {
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v := NewValue(tt.i).Elem()
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switch v.Kind() {
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case Int:
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v.Set(NewValue(int(132)))
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case Int8:
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v.Set(NewValue(int8(8)))
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case Int16:
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v.Set(NewValue(int16(16)))
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case Int32:
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v.Set(NewValue(int32(32)))
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case Int64:
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v.Set(NewValue(int64(64)))
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case Uint:
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v.Set(NewValue(uint(132)))
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case Uint8:
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v.Set(NewValue(uint8(8)))
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case Uint16:
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v.Set(NewValue(uint16(16)))
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case Uint32:
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v.Set(NewValue(uint32(32)))
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case Uint64:
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v.Set(NewValue(uint64(64)))
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case Float32:
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v.Set(NewValue(float32(256.25)))
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case Float64:
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v.Set(NewValue(512.125))
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case Complex64:
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v.Set(NewValue(complex64(532.125 + 10i)))
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case Complex128:
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v.Set(NewValue(complex128(564.25 + 1i)))
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case String:
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v.Set(NewValue("stringy cheese"))
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case Bool:
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v.Set(NewValue(true))
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}
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s := valueToString(v)
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if s != tt.s {
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t.Errorf("#%d: have %#q, want %#q", i, s, tt.s)
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}
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}
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}
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var _i = 7
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var valueToStringTests = []pair{
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{123, "123"},
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{123.5, "123.5"},
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{byte(123), "123"},
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{"abc", "abc"},
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{T{123, 456.75, "hello", &_i}, "reflect_test.T{123, 456.75, hello, *int(&7)}"},
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{new(chan *T), "*chan *reflect_test.T(&chan *reflect_test.T)"},
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{[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"},
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{&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "*[10]int(&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})"},
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{[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}"},
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{&[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, "*[]int(&[]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})"},
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}
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func TestValueToString(t *testing.T) {
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for i, test := range valueToStringTests {
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s := valueToString(NewValue(test.i))
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if s != test.s {
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t.Errorf("#%d: have %#q, want %#q", i, s, test.s)
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}
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}
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}
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func TestArrayElemSet(t *testing.T) {
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v := NewValue(&[10]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}).Elem()
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v.Index(4).SetInt(123)
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s := valueToString(v)
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const want = "[10]int{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}"
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if s != want {
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t.Errorf("[10]int: have %#q want %#q", s, want)
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}
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v = NewValue([]int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})
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v.Index(4).SetInt(123)
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s = valueToString(v)
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const want1 = "[]int{1, 2, 3, 4, 123, 6, 7, 8, 9, 10}"
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if s != want1 {
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t.Errorf("[]int: have %#q want %#q", s, want1)
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}
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}
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func TestPtrPointTo(t *testing.T) {
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var ip *int32
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var i int32 = 1234
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vip := NewValue(&ip)
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vi := NewValue(&i).Elem()
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vip.Elem().Set(vi.Addr())
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if *ip != 1234 {
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t.Errorf("got %d, want 1234", *ip)
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}
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ip = nil
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vp := NewValue(&ip).Elem()
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vp.Set(Zero(vp.Type()))
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if ip != nil {
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t.Errorf("got non-nil (%p), want nil", ip)
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}
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}
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func TestPtrSetNil(t *testing.T) {
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var i int32 = 1234
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ip := &i
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vip := NewValue(&ip)
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vip.Elem().Set(Zero(vip.Elem().Type()))
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if ip != nil {
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t.Errorf("got non-nil (%d), want nil", *ip)
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}
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}
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func TestMapSetNil(t *testing.T) {
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m := make(map[string]int)
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vm := NewValue(&m)
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vm.Elem().Set(Zero(vm.Elem().Type()))
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if m != nil {
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t.Errorf("got non-nil (%p), want nil", m)
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}
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}
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func TestAll(t *testing.T) {
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testType(t, 1, Typeof((int8)(0)), "int8")
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testType(t, 2, Typeof((*int8)(nil)).Elem(), "int8")
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typ := Typeof((*struct {
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c chan *int32
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d float32
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})(nil))
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testType(t, 3, typ, "*struct { c chan *int32; d float32 }")
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etyp := typ.Elem()
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testType(t, 4, etyp, "struct { c chan *int32; d float32 }")
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styp := etyp
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f := styp.Field(0)
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testType(t, 5, f.Type, "chan *int32")
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f, present := styp.FieldByName("d")
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if !present {
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t.Errorf("FieldByName says present field is absent")
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}
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testType(t, 6, f.Type, "float32")
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f, present = styp.FieldByName("absent")
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if present {
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t.Errorf("FieldByName says absent field is present")
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}
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typ = Typeof([32]int32{})
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testType(t, 7, typ, "[32]int32")
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testType(t, 8, typ.Elem(), "int32")
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typ = Typeof((map[string]*int32)(nil))
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testType(t, 9, typ, "map[string] *int32")
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mtyp := typ
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testType(t, 10, mtyp.Key(), "string")
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testType(t, 11, mtyp.Elem(), "*int32")
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typ = Typeof((chan<- string)(nil))
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testType(t, 12, typ, "chan<- string")
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testType(t, 13, typ.Elem(), "string")
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// make sure tag strings are not part of element type
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typ = Typeof(struct {
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d []uint32 "TAG"
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}{}).Field(0).Type
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testType(t, 14, typ, "[]uint32")
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}
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func TestInterfaceGet(t *testing.T) {
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var inter struct {
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E interface{}
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}
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inter.E = 123.456
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v1 := NewValue(&inter)
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v2 := v1.Elem().Field(0)
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assert(t, v2.Type().String(), "interface { }")
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i2 := v2.Interface()
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v3 := NewValue(i2)
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assert(t, v3.Type().String(), "float64")
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}
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func TestInterfaceValue(t *testing.T) {
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var inter struct {
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E interface{}
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}
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inter.E = 123.456
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v1 := NewValue(&inter)
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v2 := v1.Elem().Field(0)
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assert(t, v2.Type().String(), "interface { }")
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v3 := v2.Elem()
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assert(t, v3.Type().String(), "float64")
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i3 := v2.Interface()
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if _, ok := i3.(float64); !ok {
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t.Error("v2.Interface() did not return float64, got ", Typeof(i3))
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}
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}
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func TestFunctionValue(t *testing.T) {
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var x interface{} = func() {}
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v := NewValue(x)
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if v.Interface() != v.Interface() || v.Interface() != x {
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t.Fatalf("TestFunction != itself")
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}
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assert(t, v.Type().String(), "func()")
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}
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var appendTests = []struct {
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orig, extra []int
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}{
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{make([]int, 2, 4), []int{22}},
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{make([]int, 2, 4), []int{22, 33, 44}},
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}
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func sameInts(x, y []int) bool {
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if len(x) != len(y) {
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return false
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}
|
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for i, xx := range x {
|
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if xx != y[i] {
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return false
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}
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}
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return true
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}
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func TestAppend(t *testing.T) {
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for i, test := range appendTests {
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origLen, extraLen := len(test.orig), len(test.extra)
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want := append(test.orig, test.extra...)
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// Convert extra from []int to []Value.
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e0 := make([]Value, len(test.extra))
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for j, e := range test.extra {
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e0[j] = NewValue(e)
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}
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// Convert extra from []int to *SliceValue.
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e1 := NewValue(test.extra)
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// Test Append.
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a0 := NewValue(test.orig)
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have0 := Append(a0, e0...).Interface().([]int)
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if !sameInts(have0, want) {
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t.Errorf("Append #%d: have %v, want %v (%p %p)", i, have0, want, test.orig, have0)
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}
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// Check that the orig and extra slices were not modified.
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if len(test.orig) != origLen {
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t.Errorf("Append #%d origLen: have %v, want %v", i, len(test.orig), origLen)
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}
|
|
if len(test.extra) != extraLen {
|
|
t.Errorf("Append #%d extraLen: have %v, want %v", i, len(test.extra), extraLen)
|
|
}
|
|
// Test AppendSlice.
|
|
a1 := NewValue(test.orig)
|
|
have1 := AppendSlice(a1, e1).Interface().([]int)
|
|
if !sameInts(have1, want) {
|
|
t.Errorf("AppendSlice #%d: have %v, want %v", i, have1, want)
|
|
}
|
|
// Check that the orig and extra slices were not modified.
|
|
if len(test.orig) != origLen {
|
|
t.Errorf("AppendSlice #%d origLen: have %v, want %v", i, len(test.orig), origLen)
|
|
}
|
|
if len(test.extra) != extraLen {
|
|
t.Errorf("AppendSlice #%d extraLen: have %v, want %v", i, len(test.extra), extraLen)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestCopy(t *testing.T) {
|
|
a := []int{1, 2, 3, 4, 10, 9, 8, 7}
|
|
b := []int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44}
|
|
c := []int{11, 22, 33, 44, 1010, 99, 88, 77, 66, 55, 44}
|
|
for i := 0; i < len(b); i++ {
|
|
if b[i] != c[i] {
|
|
t.Fatalf("b != c before test")
|
|
}
|
|
}
|
|
a1 := a
|
|
b1 := b
|
|
aa := NewValue(&a1).Elem()
|
|
ab := NewValue(&b1).Elem()
|
|
for tocopy := 1; tocopy <= 7; tocopy++ {
|
|
aa.SetLen(tocopy)
|
|
Copy(ab, aa)
|
|
aa.SetLen(8)
|
|
for i := 0; i < tocopy; i++ {
|
|
if a[i] != b[i] {
|
|
t.Errorf("(i) tocopy=%d a[%d]=%d, b[%d]=%d",
|
|
tocopy, i, a[i], i, b[i])
|
|
}
|
|
}
|
|
for i := tocopy; i < len(b); i++ {
|
|
if b[i] != c[i] {
|
|
if i < len(a) {
|
|
t.Errorf("(ii) tocopy=%d a[%d]=%d, b[%d]=%d, c[%d]=%d",
|
|
tocopy, i, a[i], i, b[i], i, c[i])
|
|
} else {
|
|
t.Errorf("(iii) tocopy=%d b[%d]=%d, c[%d]=%d",
|
|
tocopy, i, b[i], i, c[i])
|
|
}
|
|
} else {
|
|
t.Logf("tocopy=%d elem %d is okay\n", tocopy, i)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBigUnnamedStruct(t *testing.T) {
|
|
b := struct{ a, b, c, d int64 }{1, 2, 3, 4}
|
|
v := NewValue(b)
|
|
b1 := v.Interface().(struct {
|
|
a, b, c, d int64
|
|
})
|
|
if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d {
|
|
t.Errorf("NewValue(%v).Interface().(*Big) = %v", b, b1)
|
|
}
|
|
}
|
|
|
|
type big struct {
|
|
a, b, c, d, e int64
|
|
}
|
|
|
|
func TestBigStruct(t *testing.T) {
|
|
b := big{1, 2, 3, 4, 5}
|
|
v := NewValue(b)
|
|
b1 := v.Interface().(big)
|
|
if b1.a != b.a || b1.b != b.b || b1.c != b.c || b1.d != b.d || b1.e != b.e {
|
|
t.Errorf("NewValue(%v).Interface().(big) = %v", b, b1)
|
|
}
|
|
}
|
|
|
|
type Basic struct {
|
|
x int
|
|
y float32
|
|
}
|
|
|
|
type NotBasic Basic
|
|
|
|
type DeepEqualTest struct {
|
|
a, b interface{}
|
|
eq bool
|
|
}
|
|
|
|
var deepEqualTests = []DeepEqualTest{
|
|
// Equalities
|
|
{1, 1, true},
|
|
{int32(1), int32(1), true},
|
|
{0.5, 0.5, true},
|
|
{float32(0.5), float32(0.5), true},
|
|
{"hello", "hello", true},
|
|
{make([]int, 10), make([]int, 10), true},
|
|
{&[3]int{1, 2, 3}, &[3]int{1, 2, 3}, true},
|
|
{Basic{1, 0.5}, Basic{1, 0.5}, true},
|
|
{os.Error(nil), os.Error(nil), true},
|
|
{map[int]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, true},
|
|
|
|
// Inequalities
|
|
{1, 2, false},
|
|
{int32(1), int32(2), false},
|
|
{0.5, 0.6, false},
|
|
{float32(0.5), float32(0.6), false},
|
|
{"hello", "hey", false},
|
|
{make([]int, 10), make([]int, 11), false},
|
|
{&[3]int{1, 2, 3}, &[3]int{1, 2, 4}, false},
|
|
{Basic{1, 0.5}, Basic{1, 0.6}, false},
|
|
{Basic{1, 0}, Basic{2, 0}, false},
|
|
{map[int]string{1: "one", 3: "two"}, map[int]string{2: "two", 1: "one"}, false},
|
|
{map[int]string{1: "one", 2: "txo"}, map[int]string{2: "two", 1: "one"}, false},
|
|
{map[int]string{1: "one"}, map[int]string{2: "two", 1: "one"}, false},
|
|
{map[int]string{2: "two", 1: "one"}, map[int]string{1: "one"}, false},
|
|
{nil, 1, false},
|
|
{1, nil, false},
|
|
|
|
// Mismatched types
|
|
{1, 1.0, false},
|
|
{int32(1), int64(1), false},
|
|
{0.5, "hello", false},
|
|
{[]int{1, 2, 3}, [3]int{1, 2, 3}, false},
|
|
{&[3]interface{}{1, 2, 4}, &[3]interface{}{1, 2, "s"}, false},
|
|
{Basic{1, 0.5}, NotBasic{1, 0.5}, false},
|
|
{map[uint]string{1: "one", 2: "two"}, map[int]string{2: "two", 1: "one"}, false},
|
|
}
|
|
|
|
func TestDeepEqual(t *testing.T) {
|
|
for _, test := range deepEqualTests {
|
|
if r := DeepEqual(test.a, test.b); r != test.eq {
|
|
t.Errorf("DeepEqual(%v, %v) = %v, want %v", test.a, test.b, r, test.eq)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestTypeof(t *testing.T) {
|
|
for _, test := range deepEqualTests {
|
|
v := NewValue(test.a)
|
|
if !v.IsValid() {
|
|
continue
|
|
}
|
|
typ := Typeof(test.a)
|
|
if typ != v.Type() {
|
|
t.Errorf("Typeof(%v) = %v, but NewValue(%v).Type() = %v", test.a, typ, test.a, v.Type())
|
|
}
|
|
}
|
|
}
|
|
|
|
type Recursive struct {
|
|
x int
|
|
r *Recursive
|
|
}
|
|
|
|
func TestDeepEqualRecursiveStruct(t *testing.T) {
|
|
a, b := new(Recursive), new(Recursive)
|
|
*a = Recursive{12, a}
|
|
*b = Recursive{12, b}
|
|
if !DeepEqual(a, b) {
|
|
t.Error("DeepEqual(recursive same) = false, want true")
|
|
}
|
|
}
|
|
|
|
type _Complex struct {
|
|
a int
|
|
b [3]*_Complex
|
|
c *string
|
|
d map[float64]float64
|
|
}
|
|
|
|
func TestDeepEqualComplexStruct(t *testing.T) {
|
|
m := make(map[float64]float64)
|
|
stra, strb := "hello", "hello"
|
|
a, b := new(_Complex), new(_Complex)
|
|
*a = _Complex{5, [3]*_Complex{a, b, a}, &stra, m}
|
|
*b = _Complex{5, [3]*_Complex{b, a, a}, &strb, m}
|
|
if !DeepEqual(a, b) {
|
|
t.Error("DeepEqual(complex same) = false, want true")
|
|
}
|
|
}
|
|
|
|
func TestDeepEqualComplexStructInequality(t *testing.T) {
|
|
m := make(map[float64]float64)
|
|
stra, strb := "hello", "helloo" // Difference is here
|
|
a, b := new(_Complex), new(_Complex)
|
|
*a = _Complex{5, [3]*_Complex{a, b, a}, &stra, m}
|
|
*b = _Complex{5, [3]*_Complex{b, a, a}, &strb, m}
|
|
if DeepEqual(a, b) {
|
|
t.Error("DeepEqual(complex different) = true, want false")
|
|
}
|
|
}
|
|
|
|
|
|
func check2ndField(x interface{}, offs uintptr, t *testing.T) {
|
|
s := NewValue(x)
|
|
f := s.Type().Field(1)
|
|
if f.Offset != offs {
|
|
t.Error("mismatched offsets in structure alignment:", f.Offset, offs)
|
|
}
|
|
}
|
|
|
|
// Check that structure alignment & offsets viewed through reflect agree with those
|
|
// from the compiler itself.
|
|
func TestAlignment(t *testing.T) {
|
|
type T1inner struct {
|
|
a int
|
|
}
|
|
type T1 struct {
|
|
T1inner
|
|
f int
|
|
}
|
|
type T2inner struct {
|
|
a, b int
|
|
}
|
|
type T2 struct {
|
|
T2inner
|
|
f int
|
|
}
|
|
|
|
x := T1{T1inner{2}, 17}
|
|
check2ndField(x, uintptr(unsafe.Pointer(&x.f))-uintptr(unsafe.Pointer(&x)), t)
|
|
|
|
x1 := T2{T2inner{2, 3}, 17}
|
|
check2ndField(x1, uintptr(unsafe.Pointer(&x1.f))-uintptr(unsafe.Pointer(&x1)), t)
|
|
}
|
|
|
|
func Nil(a interface{}, t *testing.T) {
|
|
n := NewValue(a).Field(0)
|
|
if !n.IsNil() {
|
|
t.Errorf("%v should be nil", a)
|
|
}
|
|
}
|
|
|
|
func NotNil(a interface{}, t *testing.T) {
|
|
n := NewValue(a).Field(0)
|
|
if n.IsNil() {
|
|
t.Errorf("value of type %v should not be nil", NewValue(a).Type().String())
|
|
}
|
|
}
|
|
|
|
func TestIsNil(t *testing.T) {
|
|
// These implement IsNil.
|
|
// Wrap in extra struct to hide interface type.
|
|
doNil := []interface{}{
|
|
struct{ x *int }{},
|
|
struct{ x interface{} }{},
|
|
struct{ x map[string]int }{},
|
|
struct{ x func() bool }{},
|
|
struct{ x chan int }{},
|
|
struct{ x []string }{},
|
|
}
|
|
for _, ts := range doNil {
|
|
ty := Typeof(ts).Field(0).Type
|
|
v := Zero(ty)
|
|
v.IsNil() // panics if not okay to call
|
|
}
|
|
|
|
// Check the implementations
|
|
var pi struct {
|
|
x *int
|
|
}
|
|
Nil(pi, t)
|
|
pi.x = new(int)
|
|
NotNil(pi, t)
|
|
|
|
var si struct {
|
|
x []int
|
|
}
|
|
Nil(si, t)
|
|
si.x = make([]int, 10)
|
|
NotNil(si, t)
|
|
|
|
var ci struct {
|
|
x chan int
|
|
}
|
|
Nil(ci, t)
|
|
ci.x = make(chan int)
|
|
NotNil(ci, t)
|
|
|
|
var mi struct {
|
|
x map[int]int
|
|
}
|
|
Nil(mi, t)
|
|
mi.x = make(map[int]int)
|
|
NotNil(mi, t)
|
|
|
|
var ii struct {
|
|
x interface{}
|
|
}
|
|
Nil(ii, t)
|
|
ii.x = 2
|
|
NotNil(ii, t)
|
|
|
|
var fi struct {
|
|
x func(t *testing.T)
|
|
}
|
|
Nil(fi, t)
|
|
fi.x = TestIsNil
|
|
NotNil(fi, t)
|
|
}
|
|
|
|
func TestInterfaceExtraction(t *testing.T) {
|
|
var s struct {
|
|
w io.Writer
|
|
}
|
|
|
|
s.w = os.Stdout
|
|
v := Indirect(NewValue(&s)).Field(0).Interface()
|
|
if v != s.w.(interface{}) {
|
|
t.Error("Interface() on interface: ", v, s.w)
|
|
}
|
|
}
|
|
|
|
func TestNilPtrValueSub(t *testing.T) {
|
|
var pi *int
|
|
if pv := NewValue(pi); pv.Elem().IsValid() {
|
|
t.Error("NewValue((*int)(nil)).Elem().IsValid()")
|
|
}
|
|
}
|
|
|
|
func TestMap(t *testing.T) {
|
|
m := map[string]int{"a": 1, "b": 2}
|
|
mv := NewValue(m)
|
|
if n := mv.Len(); n != len(m) {
|
|
t.Errorf("Len = %d, want %d", n, len(m))
|
|
}
|
|
keys := mv.MapKeys()
|
|
i := 0
|
|
newmap := MakeMap(mv.Type())
|
|
for k, v := range m {
|
|
// Check that returned Keys match keys in range.
|
|
// These aren't required to be in the same order,
|
|
// but they are in this implementation, which makes
|
|
// the test easier.
|
|
if i >= len(keys) {
|
|
t.Errorf("Missing key #%d %q", i, k)
|
|
} else if kv := keys[i]; kv.String() != k {
|
|
t.Errorf("Keys[%q] = %d, want %d", i, kv.Int(), k)
|
|
}
|
|
i++
|
|
|
|
// Check that value lookup is correct.
|
|
vv := mv.MapIndex(NewValue(k))
|
|
if vi := vv.Int(); vi != int64(v) {
|
|
t.Errorf("Key %q: have value %d, want %d", k, vi, v)
|
|
}
|
|
|
|
// Copy into new map.
|
|
newmap.SetMapIndex(NewValue(k), NewValue(v))
|
|
}
|
|
vv := mv.MapIndex(NewValue("not-present"))
|
|
if vv.IsValid() {
|
|
t.Errorf("Invalid key: got non-nil value %s", valueToString(vv))
|
|
}
|
|
|
|
newm := newmap.Interface().(map[string]int)
|
|
if len(newm) != len(m) {
|
|
t.Errorf("length after copy: newm=%d, m=%d", newm, m)
|
|
}
|
|
|
|
for k, v := range newm {
|
|
mv, ok := m[k]
|
|
if mv != v {
|
|
t.Errorf("newm[%q] = %d, but m[%q] = %d, %v", k, v, k, mv, ok)
|
|
}
|
|
}
|
|
|
|
newmap.SetMapIndex(NewValue("a"), Value{})
|
|
v, ok := newm["a"]
|
|
if ok {
|
|
t.Errorf("newm[\"a\"] = %d after delete", v)
|
|
}
|
|
|
|
mv = NewValue(&m).Elem()
|
|
mv.Set(Zero(mv.Type()))
|
|
if m != nil {
|
|
t.Errorf("mv.Set(nil) failed")
|
|
}
|
|
}
|
|
|
|
func TestChan(t *testing.T) {
|
|
for loop := 0; loop < 2; loop++ {
|
|
var c chan int
|
|
var cv Value
|
|
|
|
// check both ways to allocate channels
|
|
switch loop {
|
|
case 1:
|
|
c = make(chan int, 1)
|
|
cv = NewValue(c)
|
|
case 0:
|
|
cv = MakeChan(Typeof(c), 1)
|
|
c = cv.Interface().(chan int)
|
|
}
|
|
|
|
// Send
|
|
cv.Send(NewValue(2))
|
|
if i := <-c; i != 2 {
|
|
t.Errorf("reflect Send 2, native recv %d", i)
|
|
}
|
|
|
|
// Recv
|
|
c <- 3
|
|
if i, ok := cv.Recv(); i.Int() != 3 || !ok {
|
|
t.Errorf("native send 3, reflect Recv %d, %t", i.Int(), ok)
|
|
}
|
|
|
|
// TryRecv fail
|
|
val, ok := cv.TryRecv()
|
|
if val.IsValid() || ok {
|
|
t.Errorf("TryRecv on empty chan: %s, %t", valueToString(val), ok)
|
|
}
|
|
|
|
// TryRecv success
|
|
c <- 4
|
|
val, ok = cv.TryRecv()
|
|
if !val.IsValid() {
|
|
t.Errorf("TryRecv on ready chan got nil")
|
|
} else if i := val.Int(); i != 4 || !ok {
|
|
t.Errorf("native send 4, TryRecv %d, %t", i, ok)
|
|
}
|
|
|
|
// TrySend fail
|
|
c <- 100
|
|
ok = cv.TrySend(NewValue(5))
|
|
i := <-c
|
|
if ok {
|
|
t.Errorf("TrySend on full chan succeeded: value %d", i)
|
|
}
|
|
|
|
// TrySend success
|
|
ok = cv.TrySend(NewValue(6))
|
|
if !ok {
|
|
t.Errorf("TrySend on empty chan failed")
|
|
} else {
|
|
if i = <-c; i != 6 {
|
|
t.Errorf("TrySend 6, recv %d", i)
|
|
}
|
|
}
|
|
|
|
// Close
|
|
c <- 123
|
|
cv.Close()
|
|
if i, ok := cv.Recv(); i.Int() != 123 || !ok {
|
|
t.Errorf("send 123 then close; Recv %d, %t", i.Int(), ok)
|
|
}
|
|
if i, ok := cv.Recv(); i.Int() != 0 || ok {
|
|
t.Errorf("after close Recv %d, %t", i.Int(), ok)
|
|
}
|
|
}
|
|
|
|
// check creation of unbuffered channel
|
|
var c chan int
|
|
cv := MakeChan(Typeof(c), 0)
|
|
c = cv.Interface().(chan int)
|
|
if cv.TrySend(NewValue(7)) {
|
|
t.Errorf("TrySend on sync chan succeeded")
|
|
}
|
|
if v, ok := cv.TryRecv(); v.IsValid() || ok {
|
|
t.Errorf("TryRecv on sync chan succeeded: isvalid=%v ok=%v", v.IsValid(), ok)
|
|
}
|
|
|
|
// len/cap
|
|
cv = MakeChan(Typeof(c), 10)
|
|
c = cv.Interface().(chan int)
|
|
for i := 0; i < 3; i++ {
|
|
c <- i
|
|
}
|
|
if l, m := cv.Len(), cv.Cap(); l != len(c) || m != cap(c) {
|
|
t.Errorf("Len/Cap = %d/%d want %d/%d", l, m, len(c), cap(c))
|
|
}
|
|
|
|
}
|
|
|
|
// Difficult test for function call because of
|
|
// implicit padding between arguments.
|
|
func dummy(b byte, c int, d byte) (i byte, j int, k byte) {
|
|
return b, c, d
|
|
}
|
|
|
|
func TestFunc(t *testing.T) {
|
|
ret := NewValue(dummy).Call([]Value{NewValue(byte(10)), NewValue(20), NewValue(byte(30))})
|
|
if len(ret) != 3 {
|
|
t.Fatalf("Call returned %d values, want 3", len(ret))
|
|
}
|
|
|
|
i := byte(ret[0].Uint())
|
|
j := int(ret[1].Int())
|
|
k := byte(ret[2].Uint())
|
|
if i != 10 || j != 20 || k != 30 {
|
|
t.Errorf("Call returned %d, %d, %d; want 10, 20, 30", i, j, k)
|
|
}
|
|
}
|
|
|
|
type Point struct {
|
|
x, y int
|
|
}
|
|
|
|
func (p Point) Dist(scale int) int {
|
|
// println("Point.Dist", p.x, p.y, scale)
|
|
return p.x*p.x*scale + p.y*p.y*scale
|
|
}
|
|
|
|
func TestMethod(t *testing.T) {
|
|
// Non-curried method of type.
|
|
p := Point{3, 4}
|
|
i := Typeof(p).Method(0).Func.Call([]Value{NewValue(p), NewValue(10)})[0].Int()
|
|
if i != 250 {
|
|
t.Errorf("Type Method returned %d; want 250", i)
|
|
}
|
|
|
|
i = Typeof(&p).Method(0).Func.Call([]Value{NewValue(&p), NewValue(10)})[0].Int()
|
|
if i != 250 {
|
|
t.Errorf("Pointer Type Method returned %d; want 250", i)
|
|
}
|
|
|
|
// Curried method of value.
|
|
i = NewValue(p).Method(0).Call([]Value{NewValue(10)})[0].Int()
|
|
if i != 250 {
|
|
t.Errorf("Value Method returned %d; want 250", i)
|
|
}
|
|
|
|
// Curried method of pointer.
|
|
i = NewValue(&p).Method(0).Call([]Value{NewValue(10)})[0].Int()
|
|
if i != 250 {
|
|
t.Errorf("Value Method returned %d; want 250", i)
|
|
}
|
|
|
|
// Curried method of interface value.
|
|
// Have to wrap interface value in a struct to get at it.
|
|
// Passing it to NewValue directly would
|
|
// access the underlying Point, not the interface.
|
|
var s = struct {
|
|
X interface {
|
|
Dist(int) int
|
|
}
|
|
}{p}
|
|
pv := NewValue(s).Field(0)
|
|
i = pv.Method(0).Call([]Value{NewValue(10)})[0].Int()
|
|
if i != 250 {
|
|
t.Errorf("Interface Method returned %d; want 250", i)
|
|
}
|
|
}
|
|
|
|
func TestInterfaceSet(t *testing.T) {
|
|
p := &Point{3, 4}
|
|
|
|
var s struct {
|
|
I interface{}
|
|
P interface {
|
|
Dist(int) int
|
|
}
|
|
}
|
|
sv := NewValue(&s).Elem()
|
|
sv.Field(0).Set(NewValue(p))
|
|
if q := s.I.(*Point); q != p {
|
|
t.Errorf("i: have %p want %p", q, p)
|
|
}
|
|
|
|
pv := sv.Field(1)
|
|
pv.Set(NewValue(p))
|
|
if q := s.P.(*Point); q != p {
|
|
t.Errorf("i: have %p want %p", q, p)
|
|
}
|
|
|
|
i := pv.Method(0).Call([]Value{NewValue(10)})[0].Int()
|
|
if i != 250 {
|
|
t.Errorf("Interface Method returned %d; want 250", i)
|
|
}
|
|
}
|
|
|
|
type T1 struct {
|
|
a string
|
|
int
|
|
}
|
|
|
|
func TestAnonymousFields(t *testing.T) {
|
|
var field StructField
|
|
var ok bool
|
|
var t1 T1
|
|
type1 := Typeof(t1)
|
|
if field, ok = type1.FieldByName("int"); !ok {
|
|
t.Error("no field 'int'")
|
|
}
|
|
if field.Index[0] != 1 {
|
|
t.Error("field index should be 1; is", field.Index)
|
|
}
|
|
}
|
|
|
|
type FTest struct {
|
|
s interface{}
|
|
name string
|
|
index []int
|
|
value int
|
|
}
|
|
|
|
type D1 struct {
|
|
d int
|
|
}
|
|
type D2 struct {
|
|
d int
|
|
}
|
|
|
|
type S0 struct {
|
|
a, b, c int
|
|
D1
|
|
D2
|
|
}
|
|
|
|
type S1 struct {
|
|
b int
|
|
S0
|
|
}
|
|
|
|
type S2 struct {
|
|
a int
|
|
*S1
|
|
}
|
|
|
|
type S1x struct {
|
|
S1
|
|
}
|
|
|
|
type S1y struct {
|
|
S1
|
|
}
|
|
|
|
type S3 struct {
|
|
S1x
|
|
S2
|
|
d, e int
|
|
*S1y
|
|
}
|
|
|
|
type S4 struct {
|
|
*S4
|
|
a int
|
|
}
|
|
|
|
var fieldTests = []FTest{
|
|
{struct{}{}, "", nil, 0},
|
|
{struct{}{}, "foo", nil, 0},
|
|
{S0{a: 'a'}, "a", []int{0}, 'a'},
|
|
{S0{}, "d", nil, 0},
|
|
{S1{S0: S0{a: 'a'}}, "a", []int{1, 0}, 'a'},
|
|
{S1{b: 'b'}, "b", []int{0}, 'b'},
|
|
{S1{}, "S0", []int{1}, 0},
|
|
{S1{S0: S0{c: 'c'}}, "c", []int{1, 2}, 'c'},
|
|
{S2{a: 'a'}, "a", []int{0}, 'a'},
|
|
{S2{}, "S1", []int{1}, 0},
|
|
{S2{S1: &S1{b: 'b'}}, "b", []int{1, 0}, 'b'},
|
|
{S2{S1: &S1{S0: S0{c: 'c'}}}, "c", []int{1, 1, 2}, 'c'},
|
|
{S2{}, "d", nil, 0},
|
|
{S3{}, "S1", nil, 0},
|
|
{S3{S2: S2{a: 'a'}}, "a", []int{1, 0}, 'a'},
|
|
{S3{}, "b", nil, 0},
|
|
{S3{d: 'd'}, "d", []int{2}, 0},
|
|
{S3{e: 'e'}, "e", []int{3}, 'e'},
|
|
{S4{a: 'a'}, "a", []int{1}, 'a'},
|
|
{S4{}, "b", nil, 0},
|
|
}
|
|
|
|
func TestFieldByIndex(t *testing.T) {
|
|
for _, test := range fieldTests {
|
|
s := Typeof(test.s)
|
|
f := s.FieldByIndex(test.index)
|
|
if f.Name != "" {
|
|
if test.index != nil {
|
|
if f.Name != test.name {
|
|
t.Errorf("%s.%s found; want %s", s.Name(), f.Name, test.name)
|
|
}
|
|
} else {
|
|
t.Errorf("%s.%s found", s.Name(), f.Name)
|
|
}
|
|
} else if len(test.index) > 0 {
|
|
t.Errorf("%s.%s not found", s.Name(), test.name)
|
|
}
|
|
|
|
if test.value != 0 {
|
|
v := NewValue(test.s).FieldByIndex(test.index)
|
|
if v.IsValid() {
|
|
if x, ok := v.Interface().(int); ok {
|
|
if x != test.value {
|
|
t.Errorf("%s%v is %d; want %d", s.Name(), test.index, x, test.value)
|
|
}
|
|
} else {
|
|
t.Errorf("%s%v value not an int", s.Name(), test.index)
|
|
}
|
|
} else {
|
|
t.Errorf("%s%v value not found", s.Name(), test.index)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestFieldByName(t *testing.T) {
|
|
for _, test := range fieldTests {
|
|
s := Typeof(test.s)
|
|
f, found := s.FieldByName(test.name)
|
|
if found {
|
|
if test.index != nil {
|
|
// Verify field depth and index.
|
|
if len(f.Index) != len(test.index) {
|
|
t.Errorf("%s.%s depth %d; want %d", s.Name(), test.name, len(f.Index), len(test.index))
|
|
} else {
|
|
for i, x := range f.Index {
|
|
if x != test.index[i] {
|
|
t.Errorf("%s.%s.Index[%d] is %d; want %d", s.Name(), test.name, i, x, test.index[i])
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
t.Errorf("%s.%s found", s.Name(), f.Name)
|
|
}
|
|
} else if len(test.index) > 0 {
|
|
t.Errorf("%s.%s not found", s.Name(), test.name)
|
|
}
|
|
|
|
if test.value != 0 {
|
|
v := NewValue(test.s).FieldByName(test.name)
|
|
if v.IsValid() {
|
|
if x, ok := v.Interface().(int); ok {
|
|
if x != test.value {
|
|
t.Errorf("%s.%s is %d; want %d", s.Name(), test.name, x, test.value)
|
|
}
|
|
} else {
|
|
t.Errorf("%s.%s value not an int", s.Name(), test.name)
|
|
}
|
|
} else {
|
|
t.Errorf("%s.%s value not found", s.Name(), test.name)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestImportPath(t *testing.T) {
|
|
if path := Typeof(vector.Vector{}).PkgPath(); path != "container/vector" {
|
|
t.Errorf("Typeof(vector.Vector{}).PkgPath() = %q, want \"container/vector\"", path)
|
|
}
|
|
}
|
|
|
|
func TestDotDotDot(t *testing.T) {
|
|
// Test example from FuncType.DotDotDot documentation.
|
|
var f func(x int, y ...float64)
|
|
typ := Typeof(f)
|
|
if typ.NumIn() == 2 && typ.In(0) == Typeof(int(0)) {
|
|
sl := typ.In(1)
|
|
if sl.Kind() == Slice {
|
|
if sl.Elem() == Typeof(0.0) {
|
|
// ok
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// Failed
|
|
t.Errorf("want NumIn() = 2, In(0) = int, In(1) = []float64")
|
|
s := fmt.Sprintf("have NumIn() = %d", typ.NumIn())
|
|
for i := 0; i < typ.NumIn(); i++ {
|
|
s += fmt.Sprintf(", In(%d) = %s", i, typ.In(i))
|
|
}
|
|
t.Error(s)
|
|
}
|
|
|
|
type inner struct {
|
|
x int
|
|
}
|
|
|
|
type outer struct {
|
|
y int
|
|
inner
|
|
}
|
|
|
|
func (*inner) m() {}
|
|
func (*outer) m() {}
|
|
|
|
func TestNestedMethods(t *testing.T) {
|
|
typ := Typeof((*outer)(nil))
|
|
if typ.NumMethod() != 1 || typ.Method(0).Func.Pointer() != NewValue((*outer).m).Pointer() {
|
|
t.Errorf("Wrong method table for outer: (m=%p)", (*outer).m)
|
|
for i := 0; i < typ.NumMethod(); i++ {
|
|
m := typ.Method(i)
|
|
t.Errorf("\t%d: %s %#x\n", i, m.Name, m.Func.Pointer())
|
|
}
|
|
}
|
|
}
|
|
|
|
type innerInt struct {
|
|
x int
|
|
}
|
|
|
|
type outerInt struct {
|
|
y int
|
|
innerInt
|
|
}
|
|
|
|
func (i *innerInt) m() int {
|
|
return i.x
|
|
}
|
|
|
|
func TestEmbeddedMethods(t *testing.T) {
|
|
typ := Typeof((*outerInt)(nil))
|
|
if typ.NumMethod() != 1 || typ.Method(0).Func.Pointer() != NewValue((*outerInt).m).Pointer() {
|
|
t.Errorf("Wrong method table for outerInt: (m=%p)", (*outerInt).m)
|
|
for i := 0; i < typ.NumMethod(); i++ {
|
|
m := typ.Method(i)
|
|
t.Errorf("\t%d: %s %#x\n", i, m.Name, m.Func.Pointer())
|
|
}
|
|
}
|
|
|
|
i := &innerInt{3}
|
|
if v := NewValue(i).Method(0).Call(nil)[0].Int(); v != 3 {
|
|
t.Errorf("i.m() = %d, want 3", v)
|
|
}
|
|
|
|
o := &outerInt{1, innerInt{2}}
|
|
if v := NewValue(o).Method(0).Call(nil)[0].Int(); v != 2 {
|
|
t.Errorf("i.m() = %d, want 2", v)
|
|
}
|
|
|
|
f := (*outerInt).m
|
|
if v := f(o); v != 2 {
|
|
t.Errorf("f(o) = %d, want 2", v)
|
|
}
|
|
}
|
|
|
|
func TestPtrTo(t *testing.T) {
|
|
var i int
|
|
|
|
typ := Typeof(i)
|
|
for i = 0; i < 100; i++ {
|
|
typ = PtrTo(typ)
|
|
}
|
|
for i = 0; i < 100; i++ {
|
|
typ = typ.Elem()
|
|
}
|
|
if typ != Typeof(i) {
|
|
t.Errorf("after 100 PtrTo and Elem, have %s, want %s", typ, Typeof(i))
|
|
}
|
|
}
|
|
|
|
func TestAddr(t *testing.T) {
|
|
var p struct {
|
|
X, Y int
|
|
}
|
|
|
|
v := NewValue(&p)
|
|
v = v.Elem()
|
|
v = v.Addr()
|
|
v = v.Elem()
|
|
v = v.Field(0)
|
|
v.SetInt(2)
|
|
if p.X != 2 {
|
|
t.Errorf("Addr.Elem.Set failed to set value")
|
|
}
|
|
|
|
// Again but take address of the NewValue value.
|
|
// Exercises generation of PtrTypes not present in the binary.
|
|
q := &p
|
|
v = NewValue(&q).Elem()
|
|
v = v.Addr()
|
|
v = v.Elem()
|
|
v = v.Elem()
|
|
v = v.Addr()
|
|
v = v.Elem()
|
|
v = v.Field(0)
|
|
v.SetInt(3)
|
|
if p.X != 3 {
|
|
t.Errorf("Addr.Elem.Set failed to set value")
|
|
}
|
|
|
|
// Starting without pointer we should get changed value
|
|
// in interface.
|
|
qq := p
|
|
v = NewValue(&qq).Elem()
|
|
v0 := v
|
|
v = v.Addr()
|
|
v = v.Elem()
|
|
v = v.Field(0)
|
|
v.SetInt(4)
|
|
if p.X != 3 { // should be unchanged from last time
|
|
t.Errorf("somehow value Set changed original p")
|
|
}
|
|
p = v0.Interface().(struct {
|
|
X, Y int
|
|
})
|
|
if p.X != 4 {
|
|
t.Errorf("Addr.Elem.Set valued to set value in top value")
|
|
}
|
|
}
|
|
|
|
func noAlloc(t *testing.T, n int, f func(int)) {
|
|
// once to prime everything
|
|
f(-1)
|
|
runtime.MemStats.Mallocs = 0
|
|
|
|
for j := 0; j < n; j++ {
|
|
f(j)
|
|
}
|
|
if runtime.MemStats.Mallocs != 0 {
|
|
t.Fatalf("%d mallocs after %d iterations", runtime.MemStats.Mallocs, n)
|
|
}
|
|
}
|
|
|
|
func TestAllocations(t *testing.T) {
|
|
noAlloc(t, 100, func(j int) {
|
|
var i interface{}
|
|
var v Value
|
|
i = 42 + j
|
|
v = NewValue(i)
|
|
if int(v.Int()) != 42+j {
|
|
panic("wrong int")
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestSmallNegativeInt(t *testing.T) {
|
|
i := int16(-1)
|
|
v := NewValue(i)
|
|
if v.Int() != -1 {
|
|
t.Errorf("int16(-1).Int() returned %v", v.Int())
|
|
}
|
|
}
|
|
|
|
func TestSlice(t *testing.T) {
|
|
xs := []int{1, 2, 3, 4, 5, 6, 7, 8}
|
|
v := NewValue(xs).Slice(3, 5).Interface().([]int)
|
|
if len(v) != 2 || v[0] != 4 || v[1] != 5 {
|
|
t.Errorf("xs.Slice(3, 5) = %v", v)
|
|
}
|
|
|
|
xa := [7]int{10, 20, 30, 40, 50, 60, 70}
|
|
v = NewValue(&xa).Elem().Slice(2, 5).Interface().([]int)
|
|
if len(v) != 3 || v[0] != 30 || v[1] != 40 || v[2] != 50 {
|
|
t.Errorf("xa.Slice(2, 5) = %v", v)
|
|
}
|
|
}
|
|
|
|
func TestVariadic(t *testing.T) {
|
|
var b bytes.Buffer
|
|
V := NewValue
|
|
|
|
b.Reset()
|
|
V(fmt.Fprintf).Call([]Value{V(&b), V("%s, %d world"), V("hello"), V(42)})
|
|
if b.String() != "hello, 42 world" {
|
|
t.Errorf("after Fprintf Call: %q != %q", b.String(), "hello 42 world")
|
|
}
|
|
|
|
b.Reset()
|
|
V(fmt.Fprintf).CallSlice([]Value{V(&b), V("%s, %d world"), V([]interface{}{"hello", 42})})
|
|
if b.String() != "hello, 42 world" {
|
|
t.Errorf("after Fprintf CallSlice: %q != %q", b.String(), "hello 42 world")
|
|
}
|
|
}
|