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https://github.com/golang/go
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63e6ed9258
When constant values change but stringer has not been run again, we can get misleading string values. Protect against this by generating code that will fail with a compiler error when this happens. Most compilers should be smart enough to omit the code containing the checks. Change-Id: I7a36d20f014cba0e7d88851d1b649a098ee30d76 Reviewed-on: https://go-review.googlesource.com/c/tools/+/163637 Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
78 lines
2.0 KiB
Go
78 lines
2.0 KiB
Go
// Copyright 2014 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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// This file contains tests for some of the internal functions.
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package main
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import (
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"fmt"
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"testing"
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)
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// Helpers to save typing in the test cases.
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type u []uint64
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type uu [][]uint64
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type SplitTest struct {
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input u
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output uu
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signed bool
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}
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var (
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m2 = uint64(2)
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m1 = uint64(1)
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m0 = uint64(0)
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m_1 = ^uint64(0) // -1 when signed.
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m_2 = ^uint64(0) - 1 // -2 when signed.
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)
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var splitTests = []SplitTest{
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// No need for a test for the empty case; that's picked off before splitIntoRuns.
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// Single value.
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{u{1}, uu{u{1}}, false},
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// Out of order.
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{u{3, 2, 1}, uu{u{1, 2, 3}}, true},
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// Out of order.
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{u{3, 2, 1}, uu{u{1, 2, 3}}, false},
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// A gap at the beginning.
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{u{1, 33, 32, 31}, uu{u{1}, u{31, 32, 33}}, true},
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// A gap in the middle, in mixed order.
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{u{33, 7, 32, 31, 9, 8}, uu{u{7, 8, 9}, u{31, 32, 33}}, true},
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// Gaps throughout
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{u{33, 44, 1, 32, 45, 31}, uu{u{1}, u{31, 32, 33}, u{44, 45}}, true},
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// Unsigned values spanning 0.
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{u{m1, m0, m_1, m2, m_2}, uu{u{m0, m1, m2}, u{m_2, m_1}}, false},
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// Signed values spanning 0
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{u{m1, m0, m_1, m2, m_2}, uu{u{m_2, m_1, m0, m1, m2}}, true},
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}
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func TestSplitIntoRuns(t *testing.T) {
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Outer:
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for n, test := range splitTests {
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values := make([]Value, len(test.input))
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for i, v := range test.input {
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values[i] = Value{"", "", v, test.signed, fmt.Sprint(v)}
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}
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runs := splitIntoRuns(values)
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if len(runs) != len(test.output) {
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t.Errorf("#%d: %v: got %d runs; expected %d", n, test.input, len(runs), len(test.output))
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continue
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}
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for i, run := range runs {
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if len(run) != len(test.output[i]) {
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t.Errorf("#%d: got %v; expected %v", n, runs, test.output)
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continue Outer
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}
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for j, v := range run {
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if v.value != test.output[i][j] {
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t.Errorf("#%d: got %v; expected %v", n, runs, test.output)
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continue Outer
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}
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}
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}
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}
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}
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