mirror of
https://github.com/golang/go
synced 2024-10-04 14:41:25 -06:00
38f1231f3e
Use a count of -1 for infinity. Ditto for Replace. R=rsc CC=golang-dev https://golang.org/cl/1704044
744 lines
20 KiB
Go
744 lines
20 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 strings_test
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import (
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"os"
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. "strings"
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"testing"
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"unicode"
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"utf8"
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)
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func eq(a, b []string) bool {
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if len(a) != len(b) {
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return false
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}
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for i := 0; i < len(a); i++ {
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if a[i] != b[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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var abcd = "abcd"
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var faces = "☺☻☹"
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var commas = "1,2,3,4"
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var dots = "1....2....3....4"
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type IndexTest struct {
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s string
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sep string
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out int
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}
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var indexTests = []IndexTest{
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IndexTest{"", "", 0},
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IndexTest{"", "a", -1},
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IndexTest{"", "foo", -1},
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IndexTest{"fo", "foo", -1},
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IndexTest{"foo", "foo", 0},
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IndexTest{"oofofoofooo", "f", 2},
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IndexTest{"oofofoofooo", "foo", 4},
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IndexTest{"barfoobarfoo", "foo", 3},
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IndexTest{"foo", "", 0},
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IndexTest{"foo", "o", 1},
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IndexTest{"abcABCabc", "A", 3},
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// cases with one byte strings - test special case in Index()
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IndexTest{"", "a", -1},
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IndexTest{"x", "a", -1},
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IndexTest{"x", "x", 0},
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IndexTest{"abc", "a", 0},
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IndexTest{"abc", "b", 1},
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IndexTest{"abc", "c", 2},
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IndexTest{"abc", "x", -1},
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}
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var lastIndexTests = []IndexTest{
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IndexTest{"", "", 0},
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IndexTest{"", "a", -1},
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IndexTest{"", "foo", -1},
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IndexTest{"fo", "foo", -1},
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IndexTest{"foo", "foo", 0},
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IndexTest{"foo", "f", 0},
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IndexTest{"oofofoofooo", "f", 7},
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IndexTest{"oofofoofooo", "foo", 7},
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IndexTest{"barfoobarfoo", "foo", 9},
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IndexTest{"foo", "", 3},
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IndexTest{"foo", "o", 2},
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IndexTest{"abcABCabc", "A", 3},
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IndexTest{"abcABCabc", "a", 6},
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}
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var indexAnyTests = []IndexTest{
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IndexTest{"", "", -1},
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IndexTest{"", "a", -1},
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IndexTest{"", "abc", -1},
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IndexTest{"a", "", -1},
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IndexTest{"a", "a", 0},
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IndexTest{"aaa", "a", 0},
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IndexTest{"abc", "xyz", -1},
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IndexTest{"abc", "xcz", 2},
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IndexTest{"a☺b☻c☹d", "uvw☻xyz", 2 + len("☺")},
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IndexTest{"aRegExp*", ".(|)*+?^$[]", 7},
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IndexTest{dots + dots + dots, " ", -1},
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}
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// Execute f on each test case. funcName should be the name of f; it's used
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// in failure reports.
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func runIndexTests(t *testing.T, f func(s, sep string) int, funcName string, testCases []IndexTest) {
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for _, test := range testCases {
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actual := f(test.s, test.sep)
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if actual != test.out {
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t.Errorf("%s(%q,%q) = %v; want %v", funcName, test.s, test.sep, actual, test.out)
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}
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}
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}
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func TestIndex(t *testing.T) { runIndexTests(t, Index, "Index", indexTests) }
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func TestLastIndex(t *testing.T) { runIndexTests(t, LastIndex, "LastIndex", lastIndexTests) }
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func TestIndexAny(t *testing.T) { runIndexTests(t, IndexAny, "IndexAny", indexAnyTests) }
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type ExplodeTest struct {
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s string
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n int
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a []string
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}
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var explodetests = []ExplodeTest{
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ExplodeTest{abcd, 4, []string{"a", "b", "c", "d"}},
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ExplodeTest{faces, 3, []string{"☺", "☻", "☹"}},
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ExplodeTest{abcd, 2, []string{"a", "bcd"}},
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}
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func TestExplode(t *testing.T) {
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for _, tt := range explodetests {
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a := Split(tt.s, "", tt.n)
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if !eq(a, tt.a) {
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t.Errorf("explode(%q, %d) = %v; want %v", tt.s, tt.n, a, tt.a)
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continue
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}
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s := Join(a, "")
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if s != tt.s {
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t.Errorf(`Join(explode(%q, %d), "") = %q`, tt.s, tt.n, s)
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}
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}
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}
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type SplitTest struct {
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s string
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sep string
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n int
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a []string
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}
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var splittests = []SplitTest{
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SplitTest{abcd, "a", 0, nil},
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SplitTest{abcd, "a", -1, []string{"", "bcd"}},
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SplitTest{abcd, "z", -1, []string{"abcd"}},
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SplitTest{abcd, "", -1, []string{"a", "b", "c", "d"}},
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SplitTest{commas, ",", -1, []string{"1", "2", "3", "4"}},
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SplitTest{dots, "...", -1, []string{"1", ".2", ".3", ".4"}},
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SplitTest{faces, "☹", -1, []string{"☺☻", ""}},
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SplitTest{faces, "~", -1, []string{faces}},
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SplitTest{faces, "", -1, []string{"☺", "☻", "☹"}},
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SplitTest{"1 2 3 4", " ", 3, []string{"1", "2", "3 4"}},
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SplitTest{"1 2", " ", 3, []string{"1", "2"}},
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SplitTest{"123", "", 2, []string{"1", "23"}},
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SplitTest{"123", "", 17, []string{"1", "2", "3"}},
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}
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func TestSplit(t *testing.T) {
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for _, tt := range splittests {
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a := Split(tt.s, tt.sep, tt.n)
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if !eq(a, tt.a) {
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t.Errorf("Split(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, a, tt.a)
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continue
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}
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if tt.n == 0 {
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continue
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}
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s := Join(a, tt.sep)
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if s != tt.s {
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t.Errorf("Join(Split(%q, %q, %d), %q) = %q", tt.s, tt.sep, tt.n, tt.sep, s)
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}
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}
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}
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var splitaftertests = []SplitTest{
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SplitTest{abcd, "a", -1, []string{"a", "bcd"}},
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SplitTest{abcd, "z", -1, []string{"abcd"}},
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SplitTest{abcd, "", -1, []string{"a", "b", "c", "d"}},
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SplitTest{commas, ",", -1, []string{"1,", "2,", "3,", "4"}},
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SplitTest{dots, "...", -1, []string{"1...", ".2...", ".3...", ".4"}},
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SplitTest{faces, "☹", -1, []string{"☺☻☹", ""}},
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SplitTest{faces, "~", -1, []string{faces}},
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SplitTest{faces, "", -1, []string{"☺", "☻", "☹"}},
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SplitTest{"1 2 3 4", " ", 3, []string{"1 ", "2 ", "3 4"}},
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SplitTest{"1 2 3", " ", 3, []string{"1 ", "2 ", "3"}},
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SplitTest{"1 2", " ", 3, []string{"1 ", "2"}},
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SplitTest{"123", "", 2, []string{"1", "23"}},
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SplitTest{"123", "", 17, []string{"1", "2", "3"}},
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}
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func TestSplitAfter(t *testing.T) {
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for _, tt := range splitaftertests {
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a := SplitAfter(tt.s, tt.sep, tt.n)
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if !eq(a, tt.a) {
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t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, a, tt.a)
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continue
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}
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s := Join(a, "")
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if s != tt.s {
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t.Errorf(`Join(Split(%q, %q, %d), %q) = %q`, tt.s, tt.sep, tt.n, tt.sep, s)
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}
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}
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}
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type FieldsTest struct {
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s string
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a []string
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}
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var fieldstests = []FieldsTest{
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FieldsTest{"", []string{}},
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FieldsTest{" ", []string{}},
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FieldsTest{" \t ", []string{}},
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FieldsTest{" abc ", []string{"abc"}},
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FieldsTest{"1 2 3 4", []string{"1", "2", "3", "4"}},
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FieldsTest{"1 2 3 4", []string{"1", "2", "3", "4"}},
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FieldsTest{"1\t\t2\t\t3\t4", []string{"1", "2", "3", "4"}},
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FieldsTest{"1\u20002\u20013\u20024", []string{"1", "2", "3", "4"}},
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FieldsTest{"\u2000\u2001\u2002", []string{}},
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FieldsTest{"\n™\t™\n", []string{"™", "™"}},
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FieldsTest{faces, []string{faces}},
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}
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func TestFields(t *testing.T) {
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for _, tt := range fieldstests {
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a := Fields(tt.s)
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if !eq(a, tt.a) {
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t.Errorf("Fields(%q) = %v; want %v", tt.s, a, tt.a)
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continue
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}
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}
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}
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func TestFieldsFunc(t *testing.T) {
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pred := func(c int) bool { return c == 'X' }
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var fieldsFuncTests = []FieldsTest{
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FieldsTest{"", []string{}},
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FieldsTest{"XX", []string{}},
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FieldsTest{"XXhiXXX", []string{"hi"}},
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FieldsTest{"aXXbXXXcX", []string{"a", "b", "c"}},
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}
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for _, tt := range fieldsFuncTests {
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a := FieldsFunc(tt.s, pred)
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if !eq(a, tt.a) {
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t.Errorf("FieldsFunc(%q) = %v, want %v", tt.s, a, tt.a)
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}
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}
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}
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// Test case for any function which accepts and returns a single string.
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type StringTest struct {
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in, out string
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}
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// Execute f on each test case. funcName should be the name of f; it's used
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// in failure reports.
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func runStringTests(t *testing.T, f func(string) string, funcName string, testCases []StringTest) {
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for _, tc := range testCases {
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actual := f(tc.in)
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if actual != tc.out {
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t.Errorf("%s(%q) = %q; want %q", funcName, tc.in, actual, tc.out)
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}
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}
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}
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var upperTests = []StringTest{
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StringTest{"", ""},
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StringTest{"abc", "ABC"},
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StringTest{"AbC123", "ABC123"},
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StringTest{"azAZ09_", "AZAZ09_"},
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StringTest{"\u0250\u0250\u0250\u0250\u0250", "\u2C6F\u2C6F\u2C6F\u2C6F\u2C6F"}, // grows one byte per char
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}
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var lowerTests = []StringTest{
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StringTest{"", ""},
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StringTest{"abc", "abc"},
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StringTest{"AbC123", "abc123"},
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StringTest{"azAZ09_", "azaz09_"},
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StringTest{"\u2C6D\u2C6D\u2C6D\u2C6D\u2C6D", "\u0251\u0251\u0251\u0251\u0251"}, // shrinks one byte per char
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}
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const space = "\t\v\r\f\n\u0085\u00a0\u2000\u3000"
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var trimSpaceTests = []StringTest{
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StringTest{"", ""},
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StringTest{"abc", "abc"},
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StringTest{space + "abc" + space, "abc"},
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StringTest{" ", ""},
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StringTest{" \t\r\n \t\t\r\r\n\n ", ""},
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StringTest{" \t\r\n x\t\t\r\r\n\n ", "x"},
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StringTest{" \u2000\t\r\n x\t\t\r\r\ny\n \u3000", "x\t\t\r\r\ny"},
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StringTest{"1 \t\r\n2", "1 \t\r\n2"},
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StringTest{" x\x80", "x\x80"},
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StringTest{" x\xc0", "x\xc0"},
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StringTest{"x \xc0\xc0 ", "x \xc0\xc0"},
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StringTest{"x \xc0", "x \xc0"},
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StringTest{"x \xc0 ", "x \xc0"},
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StringTest{"x \xc0\xc0 ", "x \xc0\xc0"},
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StringTest{"x ☺\xc0\xc0 ", "x ☺\xc0\xc0"},
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StringTest{"x ☺ ", "x ☺"},
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}
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func tenRunes(rune int) string {
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r := make([]int, 10)
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for i := range r {
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r[i] = rune
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}
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return string(r)
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}
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// User-defined self-inverse mapping function
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func rot13(rune int) int {
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step := 13
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if rune >= 'a' && rune <= 'z' {
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return ((rune - 'a' + step) % 26) + 'a'
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}
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if rune >= 'A' && rune <= 'Z' {
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return ((rune - 'A' + step) % 26) + 'A'
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}
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return rune
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}
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func TestMap(t *testing.T) {
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// Run a couple of awful growth/shrinkage tests
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a := tenRunes('a')
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// 1. Grow. This triggers two reallocations in Map.
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maxRune := func(rune int) int { return unicode.MaxRune }
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m := Map(maxRune, a)
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expect := tenRunes(unicode.MaxRune)
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if m != expect {
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t.Errorf("growing: expected %q got %q", expect, m)
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}
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// 2. Shrink
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minRune := func(rune int) int { return 'a' }
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m = Map(minRune, tenRunes(unicode.MaxRune))
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expect = a
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if m != expect {
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t.Errorf("shrinking: expected %q got %q", expect, m)
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}
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// 3. Rot13
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m = Map(rot13, "a to zed")
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expect = "n gb mrq"
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if m != expect {
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t.Errorf("rot13: expected %q got %q", expect, m)
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}
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// 4. Rot13^2
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m = Map(rot13, Map(rot13, "a to zed"))
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expect = "a to zed"
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if m != expect {
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t.Errorf("rot13: expected %q got %q", expect, m)
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}
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// 5. Drop
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dropNotLatin := func(rune int) int {
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if unicode.Is(unicode.Latin, rune) {
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return rune
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}
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return -1
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}
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m = Map(dropNotLatin, "Hello, 세계")
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expect = "Hello"
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if m != expect {
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t.Errorf("drop: expected %q got %q", expect, m)
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}
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}
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func TestToUpper(t *testing.T) { runStringTests(t, ToUpper, "ToUpper", upperTests) }
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func TestToLower(t *testing.T) { runStringTests(t, ToLower, "ToLower", lowerTests) }
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func TestSpecialCase(t *testing.T) {
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lower := "abcçdefgğhıijklmnoöprsştuüvyz"
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upper := "ABCÇDEFGĞHIİJKLMNOÖPRSŞTUÜVYZ"
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u := ToUpperSpecial(unicode.TurkishCase, upper)
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if u != upper {
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t.Errorf("Upper(upper) is %s not %s", u, upper)
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}
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u = ToUpperSpecial(unicode.TurkishCase, lower)
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if u != upper {
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t.Errorf("Upper(lower) is %s not %s", u, upper)
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}
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l := ToLowerSpecial(unicode.TurkishCase, lower)
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if l != lower {
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t.Errorf("Lower(lower) is %s not %s", l, lower)
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}
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l = ToLowerSpecial(unicode.TurkishCase, upper)
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if l != lower {
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t.Errorf("Lower(upper) is %s not %s", l, lower)
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}
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}
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func TestTrimSpace(t *testing.T) { runStringTests(t, TrimSpace, "TrimSpace", trimSpaceTests) }
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type TrimTest struct {
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f func(string, string) string
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in, cutset, out string
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}
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var trimTests = []TrimTest{
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TrimTest{Trim, "abba", "a", "bb"},
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TrimTest{Trim, "abba", "ab", ""},
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TrimTest{TrimLeft, "abba", "ab", ""},
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TrimTest{TrimRight, "abba", "ab", ""},
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TrimTest{TrimLeft, "abba", "a", "bba"},
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TrimTest{TrimRight, "abba", "a", "abb"},
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TrimTest{Trim, "<tag>", "<>", "tag"},
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TrimTest{Trim, "* listitem", " *", "listitem"},
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TrimTest{Trim, `"quote"`, `"`, "quote"},
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TrimTest{Trim, "\u2C6F\u2C6F\u0250\u0250\u2C6F\u2C6F", "\u2C6F", "\u0250\u0250"},
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//empty string tests
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TrimTest{Trim, "abba", "", "abba"},
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TrimTest{Trim, "", "123", ""},
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TrimTest{Trim, "", "", ""},
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TrimTest{TrimLeft, "abba", "", "abba"},
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TrimTest{TrimLeft, "", "123", ""},
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TrimTest{TrimLeft, "", "", ""},
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TrimTest{TrimRight, "abba", "", "abba"},
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TrimTest{TrimRight, "", "123", ""},
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TrimTest{TrimRight, "", "", ""},
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TrimTest{TrimRight, "☺\xc0", "☺", "☺\xc0"},
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}
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// naiveTrimRight implements a version of TrimRight
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// by scanning forwards from the start of s.
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func naiveTrimRight(s string, cutset string) string {
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i := -1
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for j, r := range s {
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if IndexRune(cutset, r) == -1 {
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i = j
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}
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}
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if i >= 0 && s[i] >= utf8.RuneSelf {
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_, wid := utf8.DecodeRuneInString(s[i:])
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i += wid
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} else {
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i++
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}
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return s[0:i]
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}
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func TestTrim(t *testing.T) {
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for _, tc := range trimTests {
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actual := tc.f(tc.in, tc.cutset)
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var name string
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switch tc.f {
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case Trim:
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name = "Trim"
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case TrimLeft:
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name = "TrimLeft"
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case TrimRight:
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name = "TrimRight"
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default:
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t.Error("Undefined trim function")
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}
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if actual != tc.out {
|
||
t.Errorf("%s(%q, %q) = %q; want %q", name, tc.in, tc.cutset, actual, tc.out)
|
||
}
|
||
// test equivalence of TrimRight to naive version
|
||
if tc.f == TrimRight {
|
||
naive := naiveTrimRight(tc.in, tc.cutset)
|
||
if naive != actual {
|
||
t.Errorf("TrimRight(%q, %q) = %q, want %q", tc.in, tc.cutset, actual, naive)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
var isSpace = predicate{unicode.IsSpace, "IsSpace"}
|
||
var isDigit = predicate{unicode.IsDigit, "IsDigit"}
|
||
var isUpper = predicate{unicode.IsUpper, "IsUpper"}
|
||
var isValidRune = predicate{
|
||
func(r int) bool {
|
||
return r != utf8.RuneError
|
||
},
|
||
"IsValidRune",
|
||
}
|
||
|
||
type predicate struct {
|
||
f func(r int) bool
|
||
name string
|
||
}
|
||
|
||
type TrimFuncTest struct {
|
||
f predicate
|
||
in, out string
|
||
}
|
||
|
||
func not(p predicate) predicate {
|
||
return predicate{
|
||
func(r int) bool {
|
||
return !p.f(r)
|
||
},
|
||
"not " + p.name,
|
||
}
|
||
}
|
||
|
||
var trimFuncTests = []TrimFuncTest{
|
||
TrimFuncTest{isSpace, space + " hello " + space, "hello"},
|
||
TrimFuncTest{isDigit, "\u0e50\u0e5212hello34\u0e50\u0e51", "hello"},
|
||
TrimFuncTest{isUpper, "\u2C6F\u2C6F\u2C6F\u2C6FABCDhelloEF\u2C6F\u2C6FGH\u2C6F\u2C6F", "hello"},
|
||
TrimFuncTest{not(isSpace), "hello" + space + "hello", space},
|
||
TrimFuncTest{not(isDigit), "hello\u0e50\u0e521234\u0e50\u0e51helo", "\u0e50\u0e521234\u0e50\u0e51"},
|
||
TrimFuncTest{isValidRune, "ab\xc0a\xc0cd", "\xc0a\xc0"},
|
||
TrimFuncTest{not(isValidRune), "\xc0a\xc0", "a"},
|
||
}
|
||
|
||
func TestTrimFunc(t *testing.T) {
|
||
for _, tc := range trimFuncTests {
|
||
actual := TrimFunc(tc.in, tc.f.f)
|
||
if actual != tc.out {
|
||
t.Errorf("TrimFunc(%q, %q) = %q; want %q", tc.in, tc.f.name, actual, tc.out)
|
||
}
|
||
}
|
||
}
|
||
|
||
type IndexFuncTest struct {
|
||
in string
|
||
f predicate
|
||
first, last int
|
||
}
|
||
|
||
var indexFuncTests = []IndexFuncTest{
|
||
IndexFuncTest{"", isValidRune, -1, -1},
|
||
IndexFuncTest{"abc", isDigit, -1, -1},
|
||
IndexFuncTest{"0123", isDigit, 0, 3},
|
||
IndexFuncTest{"a1b", isDigit, 1, 1},
|
||
IndexFuncTest{space, isSpace, 0, len(space) - 3}, // last rune in space is 3 bytes
|
||
IndexFuncTest{"\u0e50\u0e5212hello34\u0e50\u0e51", isDigit, 0, 18},
|
||
IndexFuncTest{"\u2C6F\u2C6F\u2C6F\u2C6FABCDhelloEF\u2C6F\u2C6FGH\u2C6F\u2C6F", isUpper, 0, 34},
|
||
IndexFuncTest{"12\u0e50\u0e52hello34\u0e50\u0e51", not(isDigit), 8, 12},
|
||
|
||
// broken unicode tests
|
||
IndexFuncTest{"\x801", isDigit, 1, 1},
|
||
IndexFuncTest{"\x80abc", isDigit, -1, -1},
|
||
IndexFuncTest{"\xc0a\xc0", isValidRune, 1, 1},
|
||
IndexFuncTest{"\xc0a\xc0", not(isValidRune), 0, 2},
|
||
IndexFuncTest{"\xc0☺\xc0", not(isValidRune), 0, 4},
|
||
IndexFuncTest{"\xc0☺\xc0\xc0", not(isValidRune), 0, 5},
|
||
IndexFuncTest{"ab\xc0a\xc0cd", not(isValidRune), 2, 4},
|
||
IndexFuncTest{"a\xe0\x80cd", not(isValidRune), 1, 2},
|
||
}
|
||
|
||
func TestIndexFunc(t *testing.T) {
|
||
for _, tc := range indexFuncTests {
|
||
first := IndexFunc(tc.in, tc.f.f)
|
||
if first != tc.first {
|
||
t.Errorf("IndexFunc(%q, %s) = %d; want %d", tc.in, tc.f.name, first, tc.first)
|
||
}
|
||
last := LastIndexFunc(tc.in, tc.f.f)
|
||
if last != tc.last {
|
||
t.Errorf("LastIndexFunc(%q, %s) = %d; want %d", tc.in, tc.f.name, last, tc.last)
|
||
}
|
||
}
|
||
}
|
||
|
||
func equal(m string, s1, s2 string, t *testing.T) bool {
|
||
if s1 == s2 {
|
||
return true
|
||
}
|
||
e1 := Split(s1, "", -1)
|
||
e2 := Split(s2, "", -1)
|
||
for i, c1 := range e1 {
|
||
if i > len(e2) {
|
||
break
|
||
}
|
||
r1, _ := utf8.DecodeRuneInString(c1)
|
||
r2, _ := utf8.DecodeRuneInString(e2[i])
|
||
if r1 != r2 {
|
||
t.Errorf("%s diff at %d: U+%04X U+%04X", m, i, r1, r2)
|
||
}
|
||
}
|
||
return false
|
||
}
|
||
|
||
func TestCaseConsistency(t *testing.T) {
|
||
// Make a string of all the runes.
|
||
a := make([]int, unicode.MaxRune+1)
|
||
for i := range a {
|
||
a[i] = i
|
||
}
|
||
s := string(a)
|
||
// convert the cases.
|
||
upper := ToUpper(s)
|
||
lower := ToLower(s)
|
||
|
||
// Consistency checks
|
||
if n := utf8.RuneCountInString(upper); n != unicode.MaxRune+1 {
|
||
t.Error("rune count wrong in upper:", n)
|
||
}
|
||
if n := utf8.RuneCountInString(lower); n != unicode.MaxRune+1 {
|
||
t.Error("rune count wrong in lower:", n)
|
||
}
|
||
if !equal("ToUpper(upper)", ToUpper(upper), upper, t) {
|
||
t.Error("ToUpper(upper) consistency fail")
|
||
}
|
||
if !equal("ToLower(lower)", ToLower(lower), lower, t) {
|
||
t.Error("ToLower(lower) consistency fail")
|
||
}
|
||
/*
|
||
These fail because of non-one-to-oneness of the data, such as multiple
|
||
upper case 'I' mapping to 'i'. We comment them out but keep them for
|
||
interest.
|
||
For instance: CAPITAL LETTER I WITH DOT ABOVE:
|
||
unicode.ToUpper(unicode.ToLower('\u0130')) != '\u0130'
|
||
|
||
if !equal("ToUpper(lower)", ToUpper(lower), upper, t) {
|
||
t.Error("ToUpper(lower) consistency fail");
|
||
}
|
||
if !equal("ToLower(upper)", ToLower(upper), lower, t) {
|
||
t.Error("ToLower(upper) consistency fail");
|
||
}
|
||
*/
|
||
}
|
||
|
||
type RepeatTest struct {
|
||
in, out string
|
||
count int
|
||
}
|
||
|
||
var RepeatTests = []RepeatTest{
|
||
RepeatTest{"", "", 0},
|
||
RepeatTest{"", "", 1},
|
||
RepeatTest{"", "", 2},
|
||
RepeatTest{"-", "", 0},
|
||
RepeatTest{"-", "-", 1},
|
||
RepeatTest{"-", "----------", 10},
|
||
RepeatTest{"abc ", "abc abc abc ", 3},
|
||
}
|
||
|
||
func TestRepeat(t *testing.T) {
|
||
for _, tt := range RepeatTests {
|
||
a := Repeat(tt.in, tt.count)
|
||
if !equal("Repeat(s)", a, tt.out, t) {
|
||
t.Errorf("Repeat(%v, %d) = %v; want %v", tt.in, tt.count, a, tt.out)
|
||
continue
|
||
}
|
||
}
|
||
}
|
||
|
||
func runesEqual(a, b []int) bool {
|
||
if len(a) != len(b) {
|
||
return false
|
||
}
|
||
for i, r := range a {
|
||
if r != b[i] {
|
||
return false
|
||
}
|
||
}
|
||
return true
|
||
}
|
||
|
||
type RunesTest struct {
|
||
in string
|
||
out []int
|
||
lossy bool
|
||
}
|
||
|
||
var RunesTests = []RunesTest{
|
||
RunesTest{"", []int{}, false},
|
||
RunesTest{" ", []int{32}, false},
|
||
RunesTest{"ABC", []int{65, 66, 67}, false},
|
||
RunesTest{"abc", []int{97, 98, 99}, false},
|
||
RunesTest{"\u65e5\u672c\u8a9e", []int{26085, 26412, 35486}, false},
|
||
RunesTest{"ab\x80c", []int{97, 98, 0xFFFD, 99}, true},
|
||
RunesTest{"ab\xc0c", []int{97, 98, 0xFFFD, 99}, true},
|
||
}
|
||
|
||
func TestRunes(t *testing.T) {
|
||
for _, tt := range RunesTests {
|
||
a := []int(tt.in)
|
||
if !runesEqual(a, tt.out) {
|
||
t.Errorf("[]int(%q) = %v; want %v", tt.in, a, tt.out)
|
||
continue
|
||
}
|
||
if !tt.lossy {
|
||
// can only test reassembly if we didn't lose information
|
||
s := string(a)
|
||
if s != tt.in {
|
||
t.Errorf("string([]int(%q)) = %x; want %x", tt.in, s, tt.in)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
func TestReadRune(t *testing.T) {
|
||
testStrings := []string{"", abcd, faces, commas}
|
||
for _, s := range testStrings {
|
||
reader := NewReader(s)
|
||
res := ""
|
||
for {
|
||
r, _, e := reader.ReadRune()
|
||
if e == os.EOF {
|
||
break
|
||
}
|
||
if e != nil {
|
||
t.Errorf("Reading %q: %s", s, e)
|
||
break
|
||
}
|
||
res += string(r)
|
||
}
|
||
if res != s {
|
||
t.Errorf("Reader(%q).ReadRune() produced %q", s, res)
|
||
}
|
||
}
|
||
}
|
||
|
||
type ReplaceTest struct {
|
||
in string
|
||
old, new string
|
||
n int
|
||
out string
|
||
}
|
||
|
||
var ReplaceTests = []ReplaceTest{
|
||
ReplaceTest{"hello", "l", "L", 0, "hello"},
|
||
ReplaceTest{"hello", "l", "L", -1, "heLLo"},
|
||
ReplaceTest{"hello", "x", "X", -1, "hello"},
|
||
ReplaceTest{"", "x", "X", -1, ""},
|
||
ReplaceTest{"radar", "r", "<r>", -1, "<r>ada<r>"},
|
||
ReplaceTest{"", "", "<>", -1, "<>"},
|
||
ReplaceTest{"banana", "a", "<>", -1, "b<>n<>n<>"},
|
||
ReplaceTest{"banana", "a", "<>", 1, "b<>nana"},
|
||
ReplaceTest{"banana", "a", "<>", 1000, "b<>n<>n<>"},
|
||
ReplaceTest{"banana", "an", "<>", -1, "b<><>a"},
|
||
ReplaceTest{"banana", "ana", "<>", -1, "b<>na"},
|
||
ReplaceTest{"banana", "", "<>", -1, "<>b<>a<>n<>a<>n<>a<>"},
|
||
ReplaceTest{"banana", "", "<>", 10, "<>b<>a<>n<>a<>n<>a<>"},
|
||
ReplaceTest{"banana", "", "<>", 6, "<>b<>a<>n<>a<>n<>a"},
|
||
ReplaceTest{"banana", "", "<>", 5, "<>b<>a<>n<>a<>na"},
|
||
ReplaceTest{"banana", "", "<>", 1, "<>banana"},
|
||
ReplaceTest{"banana", "a", "a", -1, "banana"},
|
||
ReplaceTest{"banana", "a", "a", 1, "banana"},
|
||
ReplaceTest{"☺☻☹", "", "<>", -1, "<>☺<>☻<>☹<>"},
|
||
}
|
||
|
||
func TestReplace(t *testing.T) {
|
||
for _, tt := range ReplaceTests {
|
||
if s := Replace(tt.in, tt.old, tt.new, tt.n); s != tt.out {
|
||
t.Errorf("Replace(%q, %q, %q, %d) = %q, want %q", tt.in, tt.old, tt.new, tt.n, s, tt.out)
|
||
}
|
||
}
|
||
}
|