1116 lines
26 KiB
Go
1116 lines
26 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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"bytes"
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"io"
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"math/rand"
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"reflect"
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. "strings"
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"testing"
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"unicode"
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"unicode/utf8"
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"unsafe"
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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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{"", "", 0},
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{"", "a", -1},
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{"", "foo", -1},
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{"fo", "foo", -1},
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{"foo", "foo", 0},
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{"oofofoofooo", "f", 2},
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{"oofofoofooo", "foo", 4},
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{"barfoobarfoo", "foo", 3},
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{"foo", "", 0},
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{"foo", "o", 1},
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{"abcABCabc", "A", 3},
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// cases with one byte strings - test special case in Index()
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{"", "a", -1},
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{"x", "a", -1},
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{"x", "x", 0},
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{"abc", "a", 0},
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{"abc", "b", 1},
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{"abc", "c", 2},
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{"abc", "x", -1},
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}
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var lastIndexTests = []IndexTest{
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{"", "", 0},
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{"", "a", -1},
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{"", "foo", -1},
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{"fo", "foo", -1},
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{"foo", "foo", 0},
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{"foo", "f", 0},
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{"oofofoofooo", "f", 7},
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{"oofofoofooo", "foo", 7},
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{"barfoobarfoo", "foo", 9},
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{"foo", "", 3},
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{"foo", "o", 2},
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{"abcABCabc", "A", 3},
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{"abcABCabc", "a", 6},
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}
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var indexAnyTests = []IndexTest{
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{"", "", -1},
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{"", "a", -1},
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{"", "abc", -1},
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{"a", "", -1},
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{"a", "a", 0},
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{"aaa", "a", 0},
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{"abc", "xyz", -1},
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{"abc", "xcz", 2},
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{"a☺b☻c☹d", "uvw☻xyz", 2 + len("☺")},
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{"aRegExp*", ".(|)*+?^$[]", 7},
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{dots + dots + dots, " ", -1},
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}
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var lastIndexAnyTests = []IndexTest{
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{"", "", -1},
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{"", "a", -1},
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{"", "abc", -1},
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{"a", "", -1},
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{"a", "a", 0},
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{"aaa", "a", 2},
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{"abc", "xyz", -1},
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{"abc", "ab", 1},
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{"a☺b☻c☹d", "uvw☻xyz", 2 + len("☺")},
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{"a.RegExp*", ".(|)*+?^$[]", 8},
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{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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func TestLastIndexAny(t *testing.T) { runIndexTests(t, LastIndexAny, "LastIndexAny", lastIndexAnyTests) }
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var indexRuneTests = []struct {
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s string
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rune rune
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out int
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}{
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{"a A x", 'A', 2},
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{"some_text=some_value", '=', 9},
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{"☺a", 'a', 3},
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{"a☻☺b", '☺', 4},
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}
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func TestIndexRune(t *testing.T) {
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for _, test := range indexRuneTests {
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if actual := IndexRune(test.s, test.rune); actual != test.out {
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t.Errorf("IndexRune(%q,%d)= %v; want %v", test.s, test.rune, actual, test.out)
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}
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}
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}
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const benchmarkString = "some_text=some☺value"
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func BenchmarkIndexRune(b *testing.B) {
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if got := IndexRune(benchmarkString, '☺'); got != 14 {
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b.Fatalf("wrong index: expected 14, got=%d", got)
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}
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for i := 0; i < b.N; i++ {
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IndexRune(benchmarkString, '☺')
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}
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}
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func BenchmarkIndexRuneFastPath(b *testing.B) {
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if got := IndexRune(benchmarkString, 'v'); got != 17 {
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b.Fatalf("wrong index: expected 17, got=%d", got)
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}
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for i := 0; i < b.N; i++ {
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IndexRune(benchmarkString, 'v')
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}
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}
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func BenchmarkIndex(b *testing.B) {
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if got := Index(benchmarkString, "v"); got != 17 {
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b.Fatalf("wrong index: expected 17, got=%d", got)
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}
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for i := 0; i < b.N; i++ {
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Index(benchmarkString, "v")
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}
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}
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var explodetests = []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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{"", -1, []string{}},
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{abcd, 4, []string{"a", "b", "c", "d"}},
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{faces, 3, []string{"☺", "☻", "☹"}},
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{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 := SplitN(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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{abcd, "a", 0, nil},
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{abcd, "a", -1, []string{"", "bcd"}},
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{abcd, "z", -1, []string{"abcd"}},
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{abcd, "", -1, []string{"a", "b", "c", "d"}},
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{commas, ",", -1, []string{"1", "2", "3", "4"}},
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{dots, "...", -1, []string{"1", ".2", ".3", ".4"}},
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{faces, "☹", -1, []string{"☺☻", ""}},
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{faces, "~", -1, []string{faces}},
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{faces, "", -1, []string{"☺", "☻", "☹"}},
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{"1 2 3 4", " ", 3, []string{"1", "2", "3 4"}},
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{"1 2", " ", 3, []string{"1", "2"}},
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{"123", "", 2, []string{"1", "23"}},
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{"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 := SplitN(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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if tt.n < 0 {
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b := Split(tt.s, tt.sep)
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if !reflect.DeepEqual(a, b) {
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t.Errorf("Split disagrees with SplitN(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, b, a)
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}
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}
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}
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}
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var splitaftertests = []SplitTest{
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{abcd, "a", -1, []string{"a", "bcd"}},
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{abcd, "z", -1, []string{"abcd"}},
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{abcd, "", -1, []string{"a", "b", "c", "d"}},
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{commas, ",", -1, []string{"1,", "2,", "3,", "4"}},
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{dots, "...", -1, []string{"1...", ".2...", ".3...", ".4"}},
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{faces, "☹", -1, []string{"☺☻☹", ""}},
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{faces, "~", -1, []string{faces}},
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{faces, "", -1, []string{"☺", "☻", "☹"}},
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{"1 2 3 4", " ", 3, []string{"1 ", "2 ", "3 4"}},
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{"1 2 3", " ", 3, []string{"1 ", "2 ", "3"}},
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{"1 2", " ", 3, []string{"1 ", "2"}},
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{"123", "", 2, []string{"1", "23"}},
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{"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 := SplitAfterN(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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if tt.n < 0 {
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b := SplitAfter(tt.s, tt.sep)
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if !reflect.DeepEqual(a, b) {
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t.Errorf("SplitAfter disagrees with SplitAfterN(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, b, a)
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}
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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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{"", []string{}},
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{" ", []string{}},
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{" \t ", []string{}},
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{" abc ", []string{"abc"}},
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{"1 2 3 4", []string{"1", "2", "3", "4"}},
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{"1 2 3 4", []string{"1", "2", "3", "4"}},
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{"1\t\t2\t\t3\t4", []string{"1", "2", "3", "4"}},
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{"1\u20002\u20013\u20024", []string{"1", "2", "3", "4"}},
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{"\u2000\u2001\u2002", []string{}},
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{"\n™\t™\n", []string{"™", "™"}},
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{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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var FieldsFuncTests = []FieldsTest{
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{"", []string{}},
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{"XX", []string{}},
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{"XXhiXXX", []string{"hi"}},
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{"aXXbXXXcX", []string{"a", "b", "c"}},
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}
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func TestFieldsFunc(t *testing.T) {
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for _, tt := range fieldstests {
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a := FieldsFunc(tt.s, unicode.IsSpace)
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if !eq(a, tt.a) {
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t.Errorf("FieldsFunc(%q, unicode.IsSpace) = %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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pred := func(c rune) bool { return c == 'X' }
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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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{"", ""},
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{"abc", "ABC"},
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{"AbC123", "ABC123"},
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{"azAZ09_", "AZAZ09_"},
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{"\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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{"", ""},
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{"abc", "abc"},
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{"AbC123", "abc123"},
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{"azAZ09_", "azaz09_"},
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{"\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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{"", ""},
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{"abc", "abc"},
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{space + "abc" + space, "abc"},
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{" ", ""},
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{" \t\r\n \t\t\r\r\n\n ", ""},
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{" \t\r\n x\t\t\r\r\n\n ", "x"},
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{" \u2000\t\r\n x\t\t\r\r\ny\n \u3000", "x\t\t\r\r\ny"},
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{"1 \t\r\n2", "1 \t\r\n2"},
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{" x\x80", "x\x80"},
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{" x\xc0", "x\xc0"},
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{"x \xc0\xc0 ", "x \xc0\xc0"},
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{"x \xc0", "x \xc0"},
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{"x \xc0 ", "x \xc0"},
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{"x \xc0\xc0 ", "x \xc0\xc0"},
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{"x ☺\xc0\xc0 ", "x ☺\xc0\xc0"},
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{"x ☺ ", "x ☺"},
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}
|
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|
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func tenRunes(ch rune) string {
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r := make([]rune, 10)
|
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for i := range r {
|
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r[i] = ch
|
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}
|
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return string(r)
|
||
}
|
||
|
||
// User-defined self-inverse mapping function
|
||
func rot13(r rune) rune {
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||
step := rune(13)
|
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if r >= 'a' && r <= 'z' {
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||
return ((r - 'a' + step) % 26) + 'a'
|
||
}
|
||
if r >= 'A' && r <= 'Z' {
|
||
return ((r - 'A' + step) % 26) + 'A'
|
||
}
|
||
return r
|
||
}
|
||
|
||
func TestMap(t *testing.T) {
|
||
// Run a couple of awful growth/shrinkage tests
|
||
a := tenRunes('a')
|
||
// 1. Grow. This triggers two reallocations in Map.
|
||
maxRune := func(rune) rune { return unicode.MaxRune }
|
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m := Map(maxRune, a)
|
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expect := tenRunes(unicode.MaxRune)
|
||
if m != expect {
|
||
t.Errorf("growing: expected %q got %q", expect, m)
|
||
}
|
||
|
||
// 2. Shrink
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||
minRune := func(rune) rune { return 'a' }
|
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m = Map(minRune, tenRunes(unicode.MaxRune))
|
||
expect = a
|
||
if m != expect {
|
||
t.Errorf("shrinking: expected %q got %q", expect, m)
|
||
}
|
||
|
||
// 3. Rot13
|
||
m = Map(rot13, "a to zed")
|
||
expect = "n gb mrq"
|
||
if m != expect {
|
||
t.Errorf("rot13: expected %q got %q", expect, m)
|
||
}
|
||
|
||
// 4. Rot13^2
|
||
m = Map(rot13, Map(rot13, "a to zed"))
|
||
expect = "a to zed"
|
||
if m != expect {
|
||
t.Errorf("rot13: expected %q got %q", expect, m)
|
||
}
|
||
|
||
// 5. Drop
|
||
dropNotLatin := func(r rune) rune {
|
||
if unicode.Is(unicode.Latin, r) {
|
||
return r
|
||
}
|
||
return -1
|
||
}
|
||
m = Map(dropNotLatin, "Hello, 세계")
|
||
expect = "Hello"
|
||
if m != expect {
|
||
t.Errorf("drop: expected %q got %q", expect, m)
|
||
}
|
||
|
||
// 6. Identity
|
||
identity := func(r rune) rune {
|
||
return r
|
||
}
|
||
orig := "Input string that we expect not to be copied."
|
||
m = Map(identity, orig)
|
||
if (*reflect.StringHeader)(unsafe.Pointer(&orig)).Data !=
|
||
(*reflect.StringHeader)(unsafe.Pointer(&m)).Data {
|
||
t.Error("unexpected copy during identity map")
|
||
}
|
||
}
|
||
|
||
func TestToUpper(t *testing.T) { runStringTests(t, ToUpper, "ToUpper", upperTests) }
|
||
|
||
func TestToLower(t *testing.T) { runStringTests(t, ToLower, "ToLower", lowerTests) }
|
||
|
||
func BenchmarkMapNoChanges(b *testing.B) {
|
||
identity := func(r rune) rune {
|
||
return r
|
||
}
|
||
for i := 0; i < b.N; i++ {
|
||
Map(identity, "Some string that won't be modified.")
|
||
}
|
||
}
|
||
|
||
func TestSpecialCase(t *testing.T) {
|
||
lower := "abcçdefgğhıijklmnoöprsştuüvyz"
|
||
upper := "ABCÇDEFGĞHIİJKLMNOÖPRSŞTUÜVYZ"
|
||
u := ToUpperSpecial(unicode.TurkishCase, upper)
|
||
if u != upper {
|
||
t.Errorf("Upper(upper) is %s not %s", u, upper)
|
||
}
|
||
u = ToUpperSpecial(unicode.TurkishCase, lower)
|
||
if u != upper {
|
||
t.Errorf("Upper(lower) is %s not %s", u, upper)
|
||
}
|
||
l := ToLowerSpecial(unicode.TurkishCase, lower)
|
||
if l != lower {
|
||
t.Errorf("Lower(lower) is %s not %s", l, lower)
|
||
}
|
||
l = ToLowerSpecial(unicode.TurkishCase, upper)
|
||
if l != lower {
|
||
t.Errorf("Lower(upper) is %s not %s", l, lower)
|
||
}
|
||
}
|
||
|
||
func TestTrimSpace(t *testing.T) { runStringTests(t, TrimSpace, "TrimSpace", trimSpaceTests) }
|
||
|
||
var trimTests = []struct {
|
||
f string
|
||
in, arg, out string
|
||
}{
|
||
{"Trim", "abba", "a", "bb"},
|
||
{"Trim", "abba", "ab", ""},
|
||
{"TrimLeft", "abba", "ab", ""},
|
||
{"TrimRight", "abba", "ab", ""},
|
||
{"TrimLeft", "abba", "a", "bba"},
|
||
{"TrimRight", "abba", "a", "abb"},
|
||
{"Trim", "<tag>", "<>", "tag"},
|
||
{"Trim", "* listitem", " *", "listitem"},
|
||
{"Trim", `"quote"`, `"`, "quote"},
|
||
{"Trim", "\u2C6F\u2C6F\u0250\u0250\u2C6F\u2C6F", "\u2C6F", "\u0250\u0250"},
|
||
//empty string tests
|
||
{"Trim", "abba", "", "abba"},
|
||
{"Trim", "", "123", ""},
|
||
{"Trim", "", "", ""},
|
||
{"TrimLeft", "abba", "", "abba"},
|
||
{"TrimLeft", "", "123", ""},
|
||
{"TrimLeft", "", "", ""},
|
||
{"TrimRight", "abba", "", "abba"},
|
||
{"TrimRight", "", "123", ""},
|
||
{"TrimRight", "", "", ""},
|
||
{"TrimRight", "☺\xc0", "☺", "☺\xc0"},
|
||
{"TrimPrefix", "aabb", "a", "abb"},
|
||
{"TrimPrefix", "aabb", "b", "aabb"},
|
||
{"TrimSuffix", "aabb", "a", "aabb"},
|
||
{"TrimSuffix", "aabb", "b", "aab"},
|
||
}
|
||
|
||
func TestTrim(t *testing.T) {
|
||
for _, tc := range trimTests {
|
||
name := tc.f
|
||
var f func(string, string) string
|
||
switch name {
|
||
case "Trim":
|
||
f = Trim
|
||
case "TrimLeft":
|
||
f = TrimLeft
|
||
case "TrimRight":
|
||
f = TrimRight
|
||
case "TrimPrefix":
|
||
f = TrimPrefix
|
||
case "TrimSuffix":
|
||
f = TrimSuffix
|
||
default:
|
||
t.Errorf("Undefined trim function %s", name)
|
||
}
|
||
actual := f(tc.in, tc.arg)
|
||
if actual != tc.out {
|
||
t.Errorf("%s(%q, %q) = %q; want %q", name, tc.in, tc.arg, actual, tc.out)
|
||
}
|
||
}
|
||
}
|
||
|
||
type predicate struct {
|
||
f func(rune) bool
|
||
name string
|
||
}
|
||
|
||
var isSpace = predicate{unicode.IsSpace, "IsSpace"}
|
||
var isDigit = predicate{unicode.IsDigit, "IsDigit"}
|
||
var isUpper = predicate{unicode.IsUpper, "IsUpper"}
|
||
var isValidRune = predicate{
|
||
func(r rune) bool {
|
||
return r != utf8.RuneError
|
||
},
|
||
"IsValidRune",
|
||
}
|
||
|
||
func not(p predicate) predicate {
|
||
return predicate{
|
||
func(r rune) bool {
|
||
return !p.f(r)
|
||
},
|
||
"not " + p.name,
|
||
}
|
||
}
|
||
|
||
var trimFuncTests = []struct {
|
||
f predicate
|
||
in, out string
|
||
}{
|
||
{isSpace, space + " hello " + space, "hello"},
|
||
{isDigit, "\u0e50\u0e5212hello34\u0e50\u0e51", "hello"},
|
||
{isUpper, "\u2C6F\u2C6F\u2C6F\u2C6FABCDhelloEF\u2C6F\u2C6FGH\u2C6F\u2C6F", "hello"},
|
||
{not(isSpace), "hello" + space + "hello", space},
|
||
{not(isDigit), "hello\u0e50\u0e521234\u0e50\u0e51helo", "\u0e50\u0e521234\u0e50\u0e51"},
|
||
{isValidRune, "ab\xc0a\xc0cd", "\xc0a\xc0"},
|
||
{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)
|
||
}
|
||
}
|
||
}
|
||
|
||
var indexFuncTests = []struct {
|
||
in string
|
||
f predicate
|
||
first, last int
|
||
}{
|
||
{"", isValidRune, -1, -1},
|
||
{"abc", isDigit, -1, -1},
|
||
{"0123", isDigit, 0, 3},
|
||
{"a1b", isDigit, 1, 1},
|
||
{space, isSpace, 0, len(space) - 3}, // last rune in space is 3 bytes
|
||
{"\u0e50\u0e5212hello34\u0e50\u0e51", isDigit, 0, 18},
|
||
{"\u2C6F\u2C6F\u2C6F\u2C6FABCDhelloEF\u2C6F\u2C6FGH\u2C6F\u2C6F", isUpper, 0, 34},
|
||
{"12\u0e50\u0e52hello34\u0e50\u0e51", not(isDigit), 8, 12},
|
||
|
||
// tests of invalid UTF-8
|
||
{"\x801", isDigit, 1, 1},
|
||
{"\x80abc", isDigit, -1, -1},
|
||
{"\xc0a\xc0", isValidRune, 1, 1},
|
||
{"\xc0a\xc0", not(isValidRune), 0, 2},
|
||
{"\xc0☺\xc0", not(isValidRune), 0, 4},
|
||
{"\xc0☺\xc0\xc0", not(isValidRune), 0, 5},
|
||
{"ab\xc0a\xc0cd", not(isValidRune), 2, 4},
|
||
{"a\xe0\x80cd", not(isValidRune), 1, 2},
|
||
{"\x80\x80\x80\x80", not(isValidRune), 0, 3},
|
||
}
|
||
|
||
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, "")
|
||
e2 := Split(s2, "")
|
||
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.
|
||
numRunes := int(unicode.MaxRune + 1)
|
||
if testing.Short() {
|
||
numRunes = 1000
|
||
}
|
||
a := make([]rune, numRunes)
|
||
for i := range a {
|
||
a[i] = rune(i)
|
||
}
|
||
s := string(a)
|
||
// convert the cases.
|
||
upper := ToUpper(s)
|
||
lower := ToLower(s)
|
||
|
||
// Consistency checks
|
||
if n := utf8.RuneCountInString(upper); n != numRunes {
|
||
t.Error("rune count wrong in upper:", n)
|
||
}
|
||
if n := utf8.RuneCountInString(lower); n != numRunes {
|
||
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");
|
||
}
|
||
*/
|
||
}
|
||
|
||
var RepeatTests = []struct {
|
||
in, out string
|
||
count int
|
||
}{
|
||
{"", "", 0},
|
||
{"", "", 1},
|
||
{"", "", 2},
|
||
{"-", "", 0},
|
||
{"-", "-", 1},
|
||
{"-", "----------", 10},
|
||
{"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 []rune) bool {
|
||
if len(a) != len(b) {
|
||
return false
|
||
}
|
||
for i, r := range a {
|
||
if r != b[i] {
|
||
return false
|
||
}
|
||
}
|
||
return true
|
||
}
|
||
|
||
var RunesTests = []struct {
|
||
in string
|
||
out []rune
|
||
lossy bool
|
||
}{
|
||
{"", []rune{}, false},
|
||
{" ", []rune{32}, false},
|
||
{"ABC", []rune{65, 66, 67}, false},
|
||
{"abc", []rune{97, 98, 99}, false},
|
||
{"\u65e5\u672c\u8a9e", []rune{26085, 26412, 35486}, false},
|
||
{"ab\x80c", []rune{97, 98, 0xFFFD, 99}, true},
|
||
{"ab\xc0c", []rune{97, 98, 0xFFFD, 99}, true},
|
||
}
|
||
|
||
func TestRunes(t *testing.T) {
|
||
for _, tt := range RunesTests {
|
||
a := []rune(tt.in)
|
||
if !runesEqual(a, tt.out) {
|
||
t.Errorf("[]rune(%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([]rune(%q)) = %x; want %x", tt.in, s, tt.in)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
func TestReadByte(t *testing.T) {
|
||
testStrings := []string{"", abcd, faces, commas}
|
||
for _, s := range testStrings {
|
||
reader := NewReader(s)
|
||
if e := reader.UnreadByte(); e == nil {
|
||
t.Errorf("Unreading %q at beginning: expected error", s)
|
||
}
|
||
var res bytes.Buffer
|
||
for {
|
||
b, e := reader.ReadByte()
|
||
if e == io.EOF {
|
||
break
|
||
}
|
||
if e != nil {
|
||
t.Errorf("Reading %q: %s", s, e)
|
||
break
|
||
}
|
||
res.WriteByte(b)
|
||
// unread and read again
|
||
e = reader.UnreadByte()
|
||
if e != nil {
|
||
t.Errorf("Unreading %q: %s", s, e)
|
||
break
|
||
}
|
||
b1, e := reader.ReadByte()
|
||
if e != nil {
|
||
t.Errorf("Reading %q after unreading: %s", s, e)
|
||
break
|
||
}
|
||
if b1 != b {
|
||
t.Errorf("Reading %q after unreading: want byte %q, got %q", s, b, b1)
|
||
break
|
||
}
|
||
}
|
||
if res.String() != s {
|
||
t.Errorf("Reader(%q).ReadByte() produced %q", s, res.String())
|
||
}
|
||
}
|
||
}
|
||
|
||
func TestReadRune(t *testing.T) {
|
||
testStrings := []string{"", abcd, faces, commas}
|
||
for _, s := range testStrings {
|
||
reader := NewReader(s)
|
||
if e := reader.UnreadRune(); e == nil {
|
||
t.Errorf("Unreading %q at beginning: expected error", s)
|
||
}
|
||
res := ""
|
||
for {
|
||
r, z, e := reader.ReadRune()
|
||
if e == io.EOF {
|
||
break
|
||
}
|
||
if e != nil {
|
||
t.Errorf("Reading %q: %s", s, e)
|
||
break
|
||
}
|
||
res += string(r)
|
||
// unread and read again
|
||
e = reader.UnreadRune()
|
||
if e != nil {
|
||
t.Errorf("Unreading %q: %s", s, e)
|
||
break
|
||
}
|
||
r1, z1, e := reader.ReadRune()
|
||
if e != nil {
|
||
t.Errorf("Reading %q after unreading: %s", s, e)
|
||
break
|
||
}
|
||
if r1 != r {
|
||
t.Errorf("Reading %q after unreading: want rune %q, got %q", s, r, r1)
|
||
break
|
||
}
|
||
if z1 != z {
|
||
t.Errorf("Reading %q after unreading: want size %d, got %d", s, z, z1)
|
||
break
|
||
}
|
||
}
|
||
if res != s {
|
||
t.Errorf("Reader(%q).ReadRune() produced %q", s, res)
|
||
}
|
||
}
|
||
}
|
||
|
||
var ReplaceTests = []struct {
|
||
in string
|
||
old, new string
|
||
n int
|
||
out string
|
||
}{
|
||
{"hello", "l", "L", 0, "hello"},
|
||
{"hello", "l", "L", -1, "heLLo"},
|
||
{"hello", "x", "X", -1, "hello"},
|
||
{"", "x", "X", -1, ""},
|
||
{"radar", "r", "<r>", -1, "<r>ada<r>"},
|
||
{"", "", "<>", -1, "<>"},
|
||
{"banana", "a", "<>", -1, "b<>n<>n<>"},
|
||
{"banana", "a", "<>", 1, "b<>nana"},
|
||
{"banana", "a", "<>", 1000, "b<>n<>n<>"},
|
||
{"banana", "an", "<>", -1, "b<><>a"},
|
||
{"banana", "ana", "<>", -1, "b<>na"},
|
||
{"banana", "", "<>", -1, "<>b<>a<>n<>a<>n<>a<>"},
|
||
{"banana", "", "<>", 10, "<>b<>a<>n<>a<>n<>a<>"},
|
||
{"banana", "", "<>", 6, "<>b<>a<>n<>a<>n<>a"},
|
||
{"banana", "", "<>", 5, "<>b<>a<>n<>a<>na"},
|
||
{"banana", "", "<>", 1, "<>banana"},
|
||
{"banana", "a", "a", -1, "banana"},
|
||
{"banana", "a", "a", 1, "banana"},
|
||
{"☺☻☹", "", "<>", -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)
|
||
}
|
||
}
|
||
}
|
||
|
||
var TitleTests = []struct {
|
||
in, out string
|
||
}{
|
||
{"", ""},
|
||
{"a", "A"},
|
||
{" aaa aaa aaa ", " Aaa Aaa Aaa "},
|
||
{" Aaa Aaa Aaa ", " Aaa Aaa Aaa "},
|
||
{"123a456", "123a456"},
|
||
{"double-blind", "Double-Blind"},
|
||
{"ÿøû", "Ÿøû"},
|
||
}
|
||
|
||
func TestTitle(t *testing.T) {
|
||
for _, tt := range TitleTests {
|
||
if s := Title(tt.in); s != tt.out {
|
||
t.Errorf("Title(%q) = %q, want %q", tt.in, s, tt.out)
|
||
}
|
||
}
|
||
}
|
||
|
||
var ContainsTests = []struct {
|
||
str, substr string
|
||
expected bool
|
||
}{
|
||
{"abc", "bc", true},
|
||
{"abc", "bcd", false},
|
||
{"abc", "", true},
|
||
{"", "a", false},
|
||
}
|
||
|
||
func TestContains(t *testing.T) {
|
||
for _, ct := range ContainsTests {
|
||
if Contains(ct.str, ct.substr) != ct.expected {
|
||
t.Errorf("Contains(%s, %s) = %v, want %v",
|
||
ct.str, ct.substr, !ct.expected, ct.expected)
|
||
}
|
||
}
|
||
}
|
||
|
||
var ContainsAnyTests = []struct {
|
||
str, substr string
|
||
expected bool
|
||
}{
|
||
{"", "", false},
|
||
{"", "a", false},
|
||
{"", "abc", false},
|
||
{"a", "", false},
|
||
{"a", "a", true},
|
||
{"aaa", "a", true},
|
||
{"abc", "xyz", false},
|
||
{"abc", "xcz", true},
|
||
{"a☺b☻c☹d", "uvw☻xyz", true},
|
||
{"aRegExp*", ".(|)*+?^$[]", true},
|
||
{dots + dots + dots, " ", false},
|
||
}
|
||
|
||
func TestContainsAny(t *testing.T) {
|
||
for _, ct := range ContainsAnyTests {
|
||
if ContainsAny(ct.str, ct.substr) != ct.expected {
|
||
t.Errorf("ContainsAny(%s, %s) = %v, want %v",
|
||
ct.str, ct.substr, !ct.expected, ct.expected)
|
||
}
|
||
}
|
||
}
|
||
|
||
var ContainsRuneTests = []struct {
|
||
str string
|
||
r rune
|
||
expected bool
|
||
}{
|
||
{"", 'a', false},
|
||
{"a", 'a', true},
|
||
{"aaa", 'a', true},
|
||
{"abc", 'y', false},
|
||
{"abc", 'c', true},
|
||
{"a☺b☻c☹d", 'x', false},
|
||
{"a☺b☻c☹d", '☻', true},
|
||
{"aRegExp*", '*', true},
|
||
}
|
||
|
||
func TestContainsRune(t *testing.T) {
|
||
for _, ct := range ContainsRuneTests {
|
||
if ContainsRune(ct.str, ct.r) != ct.expected {
|
||
t.Errorf("ContainsRune(%q, %q) = %v, want %v",
|
||
ct.str, ct.r, !ct.expected, ct.expected)
|
||
}
|
||
}
|
||
}
|
||
|
||
var EqualFoldTests = []struct {
|
||
s, t string
|
||
out bool
|
||
}{
|
||
{"abc", "abc", true},
|
||
{"ABcd", "ABcd", true},
|
||
{"123abc", "123ABC", true},
|
||
{"αβδ", "ΑΒΔ", true},
|
||
{"abc", "xyz", false},
|
||
{"abc", "XYZ", false},
|
||
{"abcdefghijk", "abcdefghijX", false},
|
||
{"abcdefghijk", "abcdefghij\u212A", true},
|
||
{"abcdefghijK", "abcdefghij\u212A", true},
|
||
{"abcdefghijkz", "abcdefghij\u212Ay", false},
|
||
{"abcdefghijKz", "abcdefghij\u212Ay", false},
|
||
}
|
||
|
||
func TestEqualFold(t *testing.T) {
|
||
for _, tt := range EqualFoldTests {
|
||
if out := EqualFold(tt.s, tt.t); out != tt.out {
|
||
t.Errorf("EqualFold(%#q, %#q) = %v, want %v", tt.s, tt.t, out, tt.out)
|
||
}
|
||
if out := EqualFold(tt.t, tt.s); out != tt.out {
|
||
t.Errorf("EqualFold(%#q, %#q) = %v, want %v", tt.t, tt.s, out, tt.out)
|
||
}
|
||
}
|
||
}
|
||
|
||
func makeBenchInputHard() string {
|
||
tokens := [...]string{
|
||
"<a>", "<p>", "<b>", "<strong>",
|
||
"</a>", "</p>", "</b>", "</strong>",
|
||
"hello", "world",
|
||
}
|
||
x := make([]byte, 0, 1<<20)
|
||
for len(x) < 1<<20 {
|
||
i := rand.Intn(len(tokens))
|
||
x = append(x, tokens[i]...)
|
||
}
|
||
return string(x)
|
||
}
|
||
|
||
var benchInputHard = makeBenchInputHard()
|
||
|
||
func benchmarkIndexHard(b *testing.B, sep string) {
|
||
for i := 0; i < b.N; i++ {
|
||
Index(benchInputHard, sep)
|
||
}
|
||
}
|
||
|
||
func benchmarkCountHard(b *testing.B, sep string) {
|
||
for i := 0; i < b.N; i++ {
|
||
Count(benchInputHard, sep)
|
||
}
|
||
}
|
||
|
||
func BenchmarkIndexHard1(b *testing.B) { benchmarkIndexHard(b, "<>") }
|
||
func BenchmarkIndexHard2(b *testing.B) { benchmarkIndexHard(b, "</pre>") }
|
||
func BenchmarkIndexHard3(b *testing.B) { benchmarkIndexHard(b, "<b>hello world</b>") }
|
||
|
||
func BenchmarkCountHard1(b *testing.B) { benchmarkCountHard(b, "<>") }
|
||
func BenchmarkCountHard2(b *testing.B) { benchmarkCountHard(b, "</pre>") }
|
||
func BenchmarkCountHard3(b *testing.B) { benchmarkCountHard(b, "<b>hello world</b>") }
|
||
|
||
var benchInputTorture = Repeat("ABC", 1<<10) + "123" + Repeat("ABC", 1<<10)
|
||
var benchNeedleTorture = Repeat("ABC", 1<<10+1)
|
||
|
||
func BenchmarkIndexTorture(b *testing.B) {
|
||
for i := 0; i < b.N; i++ {
|
||
Index(benchInputTorture, benchNeedleTorture)
|
||
}
|
||
}
|
||
|
||
func BenchmarkCountTorture(b *testing.B) {
|
||
for i := 0; i < b.N; i++ {
|
||
Count(benchInputTorture, benchNeedleTorture)
|
||
}
|
||
}
|
||
|
||
func BenchmarkCountTortureOverlapping(b *testing.B) {
|
||
A := Repeat("ABC", 1<<20)
|
||
B := Repeat("ABC", 1<<10)
|
||
for i := 0; i < b.N; i++ {
|
||
Count(A, B)
|
||
}
|
||
}
|
||
|
||
var makeFieldsInput = func() string {
|
||
x := make([]byte, 1<<20)
|
||
// Input is ~10% space, ~10% 2-byte UTF-8, rest ASCII non-space.
|
||
for i := range x {
|
||
switch rand.Intn(10) {
|
||
case 0:
|
||
x[i] = ' '
|
||
case 1:
|
||
if i > 0 && x[i-1] == 'x' {
|
||
copy(x[i-1:], "χ")
|
||
break
|
||
}
|
||
fallthrough
|
||
default:
|
||
x[i] = 'x'
|
||
}
|
||
}
|
||
return string(x)
|
||
}
|
||
|
||
var fieldsInput = makeFieldsInput()
|
||
|
||
func BenchmarkFields(b *testing.B) {
|
||
b.SetBytes(int64(len(fieldsInput)))
|
||
for i := 0; i < b.N; i++ {
|
||
Fields(fieldsInput)
|
||
}
|
||
}
|
||
|
||
func BenchmarkFieldsFunc(b *testing.B) {
|
||
b.SetBytes(int64(len(fieldsInput)))
|
||
for i := 0; i < b.N; i++ {
|
||
FieldsFunc(fieldsInput, unicode.IsSpace)
|
||
}
|
||
}
|
||
|
||
func BenchmarkSplit1(b *testing.B) {
|
||
for i := 0; i < b.N; i++ {
|
||
Split(benchInputHard, "")
|
||
}
|
||
}
|
||
|
||
func BenchmarkSplit2(b *testing.B) {
|
||
for i := 0; i < b.N; i++ {
|
||
Split(benchInputHard, "/")
|
||
}
|
||
}
|
||
|
||
func BenchmarkSplit3(b *testing.B) {
|
||
for i := 0; i < b.N; i++ {
|
||
Split(benchInputHard, "hello")
|
||
}
|
||
}
|