1011 lines
25 KiB
Go
1011 lines
25 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 bytes_test
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import (
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. "bytes"
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"reflect"
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"testing"
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"unicode"
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"unicode/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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func arrayOfString(a [][]byte) []string {
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result := make([]string, len(a))
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for j := 0; j < len(a); j++ {
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result[j] = string(a[j])
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}
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return result
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}
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// For ease of reading, the test cases use strings that are converted to byte
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// arrays before invoking the functions.
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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 BinOpTest struct {
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a string
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b string
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i int
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}
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var compareTests = []struct {
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a, b []byte
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i int
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}{
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{[]byte(""), []byte(""), 0},
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{[]byte("a"), []byte(""), 1},
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{[]byte(""), []byte("a"), -1},
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{[]byte("abc"), []byte("abc"), 0},
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{[]byte("ab"), []byte("abc"), -1},
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{[]byte("abc"), []byte("ab"), 1},
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{[]byte("x"), []byte("ab"), 1},
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{[]byte("ab"), []byte("x"), -1},
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{[]byte("x"), []byte("a"), 1},
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{[]byte("b"), []byte("x"), -1},
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// nil tests
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{nil, nil, 0},
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{[]byte(""), nil, 0},
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{nil, []byte(""), 0},
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{[]byte("a"), nil, 1},
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{nil, []byte("a"), -1},
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}
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func TestCompare(t *testing.T) {
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for _, tt := range compareTests {
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cmp := Compare(tt.a, tt.b)
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if cmp != tt.i {
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t.Errorf(`Compare(%q, %q) = %v`, tt.a, tt.b, cmp)
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}
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eql := Equal(tt.a, tt.b)
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if eql != (tt.i == 0) {
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t.Errorf(`Equal(%q, %q) = %v`, tt.a, tt.b, eql)
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}
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eql = EqualPortable(tt.a, tt.b)
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if eql != (tt.i == 0) {
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t.Errorf(`EqualPortable(%q, %q) = %v`, tt.a, tt.b, eql)
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}
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}
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}
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var indexTests = []BinOpTest{
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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 IndexByte and 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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{"barfoobarfooyyyzzzyyyzzzyyyzzzyyyxxxzzzyyy", "x", 33},
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{"foofyfoobarfoobar", "y", 4},
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{"oooooooooooooooooooooo", "r", -1},
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}
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var lastIndexTests = []BinOpTest{
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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 = []BinOpTest{
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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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{"ab☺c", "x☺yz", 2},
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{"aRegExp*", ".(|)*+?^$[]", 7},
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{dots + dots + dots, " ", -1},
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}
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var lastIndexAnyTests = []BinOpTest{
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{"", "", -1},
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{"", "a", -1},
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{"", "abc", -1},
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{"a", "", -1},
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{"a", "a", 0},
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{"aaa", "a", 2},
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{"abc", "xyz", -1},
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{"abc", "ab", 1},
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{"a☺b☻c☹d", "uvw☻xyz", 2 + len("☺")},
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{"a.RegExp*", ".(|)*+?^$[]", 8},
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{dots + dots + dots, " ", -1},
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}
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var indexRuneTests = []BinOpTest{
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{"", "a", -1},
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{"", "☺", -1},
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{"foo", "☹", -1},
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{"foo", "o", 1},
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{"foo☺bar", "☺", 3},
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{"foo☺☻☹bar", "☹", 9},
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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 []byte) int, funcName string, testCases []BinOpTest) {
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for _, test := range testCases {
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a := []byte(test.a)
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b := []byte(test.b)
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actual := f(a, b)
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if actual != test.i {
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t.Errorf("%s(%q,%q) = %v; want %v", funcName, a, b, actual, test.i)
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}
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}
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}
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func runIndexAnyTests(t *testing.T, f func(s []byte, chars string) int, funcName string, testCases []BinOpTest) {
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for _, test := range testCases {
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a := []byte(test.a)
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actual := f(a, test.b)
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if actual != test.i {
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t.Errorf("%s(%q,%q) = %v; want %v", funcName, a, test.b, actual, test.i)
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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) { runIndexAnyTests(t, IndexAny, "IndexAny", indexAnyTests) }
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func TestLastIndexAny(t *testing.T) {
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runIndexAnyTests(t, LastIndexAny, "LastIndexAny", lastIndexAnyTests)
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}
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func TestIndexByte(t *testing.T) {
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for _, tt := range indexTests {
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if len(tt.b) != 1 {
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continue
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}
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a := []byte(tt.a)
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b := tt.b[0]
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pos := IndexByte(a, b)
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if pos != tt.i {
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t.Errorf(`IndexByte(%q, '%c') = %v`, tt.a, b, pos)
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}
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posp := IndexBytePortable(a, b)
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if posp != tt.i {
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t.Errorf(`indexBytePortable(%q, '%c') = %v`, tt.a, b, posp)
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}
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}
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}
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// test a larger buffer with different sizes and alignments
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func TestIndexByteBig(t *testing.T) {
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var n = 1024
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if testing.Short() {
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n = 128
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}
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b := make([]byte, n)
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for i := 0; i < n; i++ {
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// different start alignments
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b1 := b[i:]
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for j := 0; j < len(b1); j++ {
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b1[j] = 'x'
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pos := IndexByte(b1, 'x')
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if pos != j {
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t.Errorf("IndexByte(%q, 'x') = %v", b1, pos)
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}
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b1[j] = 0
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pos = IndexByte(b1, 'x')
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if pos != -1 {
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t.Errorf("IndexByte(%q, 'x') = %v", b1, pos)
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}
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}
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// different end alignments
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b1 = b[:i]
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for j := 0; j < len(b1); j++ {
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b1[j] = 'x'
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pos := IndexByte(b1, 'x')
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if pos != j {
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t.Errorf("IndexByte(%q, 'x') = %v", b1, pos)
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}
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b1[j] = 0
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pos = IndexByte(b1, 'x')
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if pos != -1 {
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t.Errorf("IndexByte(%q, 'x') = %v", b1, pos)
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}
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}
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// different start and end alignments
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b1 = b[i/2 : n-(i+1)/2]
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for j := 0; j < len(b1); j++ {
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b1[j] = 'x'
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pos := IndexByte(b1, 'x')
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if pos != j {
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t.Errorf("IndexByte(%q, 'x') = %v", b1, pos)
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}
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b1[j] = 0
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pos = IndexByte(b1, 'x')
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if pos != -1 {
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t.Errorf("IndexByte(%q, 'x') = %v", b1, pos)
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}
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}
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}
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}
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func TestIndexRune(t *testing.T) {
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for _, tt := range indexRuneTests {
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a := []byte(tt.a)
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r, _ := utf8.DecodeRuneInString(tt.b)
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pos := IndexRune(a, r)
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if pos != tt.i {
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t.Errorf(`IndexRune(%q, '%c') = %v`, tt.a, r, pos)
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}
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}
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}
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var bmbuf []byte
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func BenchmarkIndexByte32(b *testing.B) { bmIndexByte(b, IndexByte, 32) }
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func BenchmarkIndexByte4K(b *testing.B) { bmIndexByte(b, IndexByte, 4<<10) }
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func BenchmarkIndexByte4M(b *testing.B) { bmIndexByte(b, IndexByte, 4<<20) }
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func BenchmarkIndexByte64M(b *testing.B) { bmIndexByte(b, IndexByte, 64<<20) }
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func BenchmarkIndexBytePortable32(b *testing.B) { bmIndexByte(b, IndexBytePortable, 32) }
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func BenchmarkIndexBytePortable4K(b *testing.B) { bmIndexByte(b, IndexBytePortable, 4<<10) }
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func BenchmarkIndexBytePortable4M(b *testing.B) { bmIndexByte(b, IndexBytePortable, 4<<20) }
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func BenchmarkIndexBytePortable64M(b *testing.B) { bmIndexByte(b, IndexBytePortable, 64<<20) }
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func bmIndexByte(b *testing.B, index func([]byte, byte) int, n int) {
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if len(bmbuf) < n {
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bmbuf = make([]byte, n)
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}
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b.SetBytes(int64(n))
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buf := bmbuf[0:n]
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buf[n-1] = 'x'
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for i := 0; i < b.N; i++ {
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j := index(buf, 'x')
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if j != n-1 {
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b.Fatal("bad index", j)
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}
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}
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buf[n-1] = '\x00'
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}
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func BenchmarkEqual32(b *testing.B) { bmEqual(b, Equal, 32) }
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func BenchmarkEqual4K(b *testing.B) { bmEqual(b, Equal, 4<<10) }
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func BenchmarkEqual4M(b *testing.B) { bmEqual(b, Equal, 4<<20) }
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func BenchmarkEqual64M(b *testing.B) { bmEqual(b, Equal, 64<<20) }
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func BenchmarkEqualPort32(b *testing.B) { bmEqual(b, EqualPortable, 32) }
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func BenchmarkEqualPort4K(b *testing.B) { bmEqual(b, EqualPortable, 4<<10) }
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func BenchmarkEqualPortable4M(b *testing.B) { bmEqual(b, EqualPortable, 4<<20) }
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func BenchmarkEqualPortable64M(b *testing.B) { bmEqual(b, EqualPortable, 64<<20) }
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func bmEqual(b *testing.B, equal func([]byte, []byte) bool, n int) {
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if len(bmbuf) < 2*n {
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bmbuf = make([]byte, 2*n)
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}
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b.SetBytes(int64(n))
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buf1 := bmbuf[0:n]
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buf2 := bmbuf[n : 2*n]
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buf1[n-1] = 'x'
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buf2[n-1] = 'x'
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for i := 0; i < b.N; i++ {
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eq := equal(buf1, buf2)
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if !eq {
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b.Fatal("bad equal")
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}
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}
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buf1[n-1] = '\x00'
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buf2[n-1] = '\x00'
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}
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func BenchmarkIndex32(b *testing.B) { bmIndex(b, Index, 32) }
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func BenchmarkIndex4K(b *testing.B) { bmIndex(b, Index, 4<<10) }
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func BenchmarkIndex4M(b *testing.B) { bmIndex(b, Index, 4<<20) }
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func BenchmarkIndex64M(b *testing.B) { bmIndex(b, Index, 64<<20) }
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func bmIndex(b *testing.B, index func([]byte, []byte) int, n int) {
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if len(bmbuf) < n {
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bmbuf = make([]byte, n)
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}
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b.SetBytes(int64(n))
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buf := bmbuf[0:n]
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buf[n-1] = 'x'
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for i := 0; i < b.N; i++ {
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j := index(buf, buf[n-7:])
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if j != n-7 {
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b.Fatal("bad index", j)
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}
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}
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buf[n-1] = '\x00'
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}
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func BenchmarkIndexEasy32(b *testing.B) { bmIndexEasy(b, Index, 32) }
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func BenchmarkIndexEasy4K(b *testing.B) { bmIndexEasy(b, Index, 4<<10) }
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func BenchmarkIndexEasy4M(b *testing.B) { bmIndexEasy(b, Index, 4<<20) }
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func BenchmarkIndexEasy64M(b *testing.B) { bmIndexEasy(b, Index, 64<<20) }
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func bmIndexEasy(b *testing.B, index func([]byte, []byte) int, n int) {
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if len(bmbuf) < n {
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bmbuf = make([]byte, n)
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}
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b.SetBytes(int64(n))
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buf := bmbuf[0:n]
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buf[n-1] = 'x'
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buf[n-7] = 'x'
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for i := 0; i < b.N; i++ {
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j := index(buf, buf[n-7:])
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if j != n-7 {
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b.Fatal("bad index", j)
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}
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}
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buf[n-1] = '\x00'
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buf[n-7] = '\x00'
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}
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func BenchmarkCount32(b *testing.B) { bmCount(b, Count, 32) }
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func BenchmarkCount4K(b *testing.B) { bmCount(b, Count, 4<<10) }
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func BenchmarkCount4M(b *testing.B) { bmCount(b, Count, 4<<20) }
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func BenchmarkCount64M(b *testing.B) { bmCount(b, Count, 64<<20) }
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func bmCount(b *testing.B, count func([]byte, []byte) int, n int) {
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if len(bmbuf) < n {
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bmbuf = make([]byte, n)
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}
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b.SetBytes(int64(n))
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buf := bmbuf[0:n]
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buf[n-1] = 'x'
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for i := 0; i < b.N; i++ {
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j := count(buf, buf[n-7:])
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if j != 1 {
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b.Fatal("bad count", j)
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}
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}
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buf[n-1] = '\x00'
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}
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func BenchmarkCountEasy32(b *testing.B) { bmCountEasy(b, Count, 32) }
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func BenchmarkCountEasy4K(b *testing.B) { bmCountEasy(b, Count, 4<<10) }
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func BenchmarkCountEasy4M(b *testing.B) { bmCountEasy(b, Count, 4<<20) }
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func BenchmarkCountEasy64M(b *testing.B) { bmCountEasy(b, Count, 64<<20) }
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func bmCountEasy(b *testing.B, count func([]byte, []byte) int, n int) {
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if len(bmbuf) < n {
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bmbuf = make([]byte, n)
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}
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b.SetBytes(int64(n))
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buf := bmbuf[0:n]
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buf[n-1] = 'x'
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buf[n-7] = 'x'
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for i := 0; i < b.N; i++ {
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j := count(buf, buf[n-7:])
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if j != 1 {
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b.Fatal("bad count", j)
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}
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}
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buf[n-1] = '\x00'
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buf[n-7] = '\x00'
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}
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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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{"", -1, []string{}},
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{abcd, -1, []string{"a", "b", "c", "d"}},
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{faces, -1, []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([]byte(tt.s), nil, tt.n)
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result := arrayOfString(a)
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if !eq(result, tt.a) {
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t.Errorf(`Explode("%s", %d) = %v; want %v`, tt.s, tt.n, result, tt.a)
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continue
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}
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s := Join(a, []byte{})
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if string(s) != tt.s {
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t.Errorf(`Join(Explode("%s", %d), "") = "%s"`, 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{"☺☻", ""}},
|
|
{faces, "~", -1, []string{faces}},
|
|
{faces, "", -1, []string{"☺", "☻", "☹"}},
|
|
{"1 2 3 4", " ", 3, []string{"1", "2", "3 4"}},
|
|
{"1 2", " ", 3, []string{"1", "2"}},
|
|
{"123", "", 2, []string{"1", "23"}},
|
|
{"123", "", 17, []string{"1", "2", "3"}},
|
|
}
|
|
|
|
func TestSplit(t *testing.T) {
|
|
for _, tt := range splittests {
|
|
a := SplitN([]byte(tt.s), []byte(tt.sep), tt.n)
|
|
result := arrayOfString(a)
|
|
if !eq(result, tt.a) {
|
|
t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, result, tt.a)
|
|
continue
|
|
}
|
|
if tt.n == 0 {
|
|
continue
|
|
}
|
|
s := Join(a, []byte(tt.sep))
|
|
if string(s) != tt.s {
|
|
t.Errorf(`Join(Split(%q, %q, %d), %q) = %q`, tt.s, tt.sep, tt.n, tt.sep, s)
|
|
}
|
|
if tt.n < 0 {
|
|
b := Split([]byte(tt.s), []byte(tt.sep))
|
|
if !reflect.DeepEqual(a, b) {
|
|
t.Errorf("Split disagrees withSplitN(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, b, a)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var splitaftertests = []SplitTest{
|
|
{abcd, "a", -1, []string{"a", "bcd"}},
|
|
{abcd, "z", -1, []string{"abcd"}},
|
|
{abcd, "", -1, []string{"a", "b", "c", "d"}},
|
|
{commas, ",", -1, []string{"1,", "2,", "3,", "4"}},
|
|
{dots, "...", -1, []string{"1...", ".2...", ".3...", ".4"}},
|
|
{faces, "☹", -1, []string{"☺☻☹", ""}},
|
|
{faces, "~", -1, []string{faces}},
|
|
{faces, "", -1, []string{"☺", "☻", "☹"}},
|
|
{"1 2 3 4", " ", 3, []string{"1 ", "2 ", "3 4"}},
|
|
{"1 2 3", " ", 3, []string{"1 ", "2 ", "3"}},
|
|
{"1 2", " ", 3, []string{"1 ", "2"}},
|
|
{"123", "", 2, []string{"1", "23"}},
|
|
{"123", "", 17, []string{"1", "2", "3"}},
|
|
}
|
|
|
|
func TestSplitAfter(t *testing.T) {
|
|
for _, tt := range splitaftertests {
|
|
a := SplitAfterN([]byte(tt.s), []byte(tt.sep), tt.n)
|
|
result := arrayOfString(a)
|
|
if !eq(result, tt.a) {
|
|
t.Errorf(`Split(%q, %q, %d) = %v; want %v`, tt.s, tt.sep, tt.n, result, tt.a)
|
|
continue
|
|
}
|
|
s := Join(a, nil)
|
|
if string(s) != tt.s {
|
|
t.Errorf(`Join(Split(%q, %q, %d), %q) = %q`, tt.s, tt.sep, tt.n, tt.sep, s)
|
|
}
|
|
if tt.n < 0 {
|
|
b := SplitAfter([]byte(tt.s), []byte(tt.sep))
|
|
if !reflect.DeepEqual(a, b) {
|
|
t.Errorf("SplitAfter disagrees withSplitAfterN(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, b, a)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
type FieldsTest struct {
|
|
s string
|
|
a []string
|
|
}
|
|
|
|
var fieldstests = []FieldsTest{
|
|
{"", []string{}},
|
|
{" ", []string{}},
|
|
{" \t ", []string{}},
|
|
{" abc ", []string{"abc"}},
|
|
{"1 2 3 4", []string{"1", "2", "3", "4"}},
|
|
{"1 2 3 4", []string{"1", "2", "3", "4"}},
|
|
{"1\t\t2\t\t3\t4", []string{"1", "2", "3", "4"}},
|
|
{"1\u20002\u20013\u20024", []string{"1", "2", "3", "4"}},
|
|
{"\u2000\u2001\u2002", []string{}},
|
|
{"\n™\t™\n", []string{"™", "™"}},
|
|
{faces, []string{faces}},
|
|
}
|
|
|
|
func TestFields(t *testing.T) {
|
|
for _, tt := range fieldstests {
|
|
a := Fields([]byte(tt.s))
|
|
result := arrayOfString(a)
|
|
if !eq(result, tt.a) {
|
|
t.Errorf("Fields(%q) = %v; want %v", tt.s, a, tt.a)
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestFieldsFunc(t *testing.T) {
|
|
pred := func(c rune) bool { return c == 'X' }
|
|
var fieldsFuncTests = []FieldsTest{
|
|
{"", []string{}},
|
|
{"XX", []string{}},
|
|
{"XXhiXXX", []string{"hi"}},
|
|
{"aXXbXXXcX", []string{"a", "b", "c"}},
|
|
}
|
|
for _, tt := range fieldsFuncTests {
|
|
a := FieldsFunc([]byte(tt.s), pred)
|
|
result := arrayOfString(a)
|
|
if !eq(result, tt.a) {
|
|
t.Errorf("FieldsFunc(%q) = %v, want %v", tt.s, a, tt.a)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Test case for any function which accepts and returns a byte array.
|
|
// For ease of creation, we write the byte arrays as strings.
|
|
type StringTest struct {
|
|
in, out string
|
|
}
|
|
|
|
var upperTests = []StringTest{
|
|
{"", ""},
|
|
{"abc", "ABC"},
|
|
{"AbC123", "ABC123"},
|
|
{"azAZ09_", "AZAZ09_"},
|
|
{"\u0250\u0250\u0250\u0250\u0250", "\u2C6F\u2C6F\u2C6F\u2C6F\u2C6F"}, // grows one byte per char
|
|
}
|
|
|
|
var lowerTests = []StringTest{
|
|
{"", ""},
|
|
{"abc", "abc"},
|
|
{"AbC123", "abc123"},
|
|
{"azAZ09_", "azaz09_"},
|
|
{"\u2C6D\u2C6D\u2C6D\u2C6D\u2C6D", "\u0251\u0251\u0251\u0251\u0251"}, // shrinks one byte per char
|
|
}
|
|
|
|
const space = "\t\v\r\f\n\u0085\u00a0\u2000\u3000"
|
|
|
|
var trimSpaceTests = []StringTest{
|
|
{"", ""},
|
|
{"abc", "abc"},
|
|
{space + "abc" + space, "abc"},
|
|
{" ", ""},
|
|
{" \t\r\n \t\t\r\r\n\n ", ""},
|
|
{" \t\r\n x\t\t\r\r\n\n ", "x"},
|
|
{" \u2000\t\r\n x\t\t\r\r\ny\n \u3000", "x\t\t\r\r\ny"},
|
|
{"1 \t\r\n2", "1 \t\r\n2"},
|
|
{" x\x80", "x\x80"},
|
|
{" x\xc0", "x\xc0"},
|
|
{"x \xc0\xc0 ", "x \xc0\xc0"},
|
|
{"x \xc0", "x \xc0"},
|
|
{"x \xc0 ", "x \xc0"},
|
|
{"x \xc0\xc0 ", "x \xc0\xc0"},
|
|
{"x ☺\xc0\xc0 ", "x ☺\xc0\xc0"},
|
|
{"x ☺ ", "x ☺"},
|
|
}
|
|
|
|
// Execute f on each test case. funcName should be the name of f; it's used
|
|
// in failure reports.
|
|
func runStringTests(t *testing.T, f func([]byte) []byte, funcName string, testCases []StringTest) {
|
|
for _, tc := range testCases {
|
|
actual := string(f([]byte(tc.in)))
|
|
if actual != tc.out {
|
|
t.Errorf("%s(%q) = %q; want %q", funcName, tc.in, actual, tc.out)
|
|
}
|
|
}
|
|
}
|
|
|
|
func tenRunes(r rune) string {
|
|
runes := make([]rune, 10)
|
|
for i := range runes {
|
|
runes[i] = r
|
|
}
|
|
return string(runes)
|
|
}
|
|
|
|
// User-defined self-inverse mapping function
|
|
func rot13(r rune) rune {
|
|
const step = 13
|
|
if r >= 'a' && r <= 'z' {
|
|
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(r rune) rune { return unicode.MaxRune }
|
|
m := Map(maxRune, []byte(a))
|
|
expect := tenRunes(unicode.MaxRune)
|
|
if string(m) != expect {
|
|
t.Errorf("growing: expected %q got %q", expect, m)
|
|
}
|
|
|
|
// 2. Shrink
|
|
minRune := func(r rune) rune { return 'a' }
|
|
m = Map(minRune, []byte(tenRunes(unicode.MaxRune)))
|
|
expect = a
|
|
if string(m) != expect {
|
|
t.Errorf("shrinking: expected %q got %q", expect, m)
|
|
}
|
|
|
|
// 3. Rot13
|
|
m = Map(rot13, []byte("a to zed"))
|
|
expect = "n gb mrq"
|
|
if string(m) != expect {
|
|
t.Errorf("rot13: expected %q got %q", expect, m)
|
|
}
|
|
|
|
// 4. Rot13^2
|
|
m = Map(rot13, Map(rot13, []byte("a to zed")))
|
|
expect = "a to zed"
|
|
if string(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, []byte("Hello, 세계"))
|
|
expect = "Hello"
|
|
if string(m) != expect {
|
|
t.Errorf("drop: expected %q got %q", expect, m)
|
|
}
|
|
}
|
|
|
|
func TestToUpper(t *testing.T) { runStringTests(t, ToUpper, "ToUpper", upperTests) }
|
|
|
|
func TestToLower(t *testing.T) { runStringTests(t, ToLower, "ToLower", lowerTests) }
|
|
|
|
func TestTrimSpace(t *testing.T) { runStringTests(t, TrimSpace, "TrimSpace", trimSpaceTests) }
|
|
|
|
type RepeatTest struct {
|
|
in, out string
|
|
count int
|
|
}
|
|
|
|
var RepeatTests = []RepeatTest{
|
|
{"", "", 0},
|
|
{"", "", 1},
|
|
{"", "", 2},
|
|
{"-", "", 0},
|
|
{"-", "-", 1},
|
|
{"-", "----------", 10},
|
|
{"abc ", "abc abc abc ", 3},
|
|
}
|
|
|
|
func TestRepeat(t *testing.T) {
|
|
for _, tt := range RepeatTests {
|
|
tin := []byte(tt.in)
|
|
tout := []byte(tt.out)
|
|
a := Repeat(tin, tt.count)
|
|
if !Equal(a, tout) {
|
|
t.Errorf("Repeat(%q, %d) = %q; want %q", tin, tt.count, a, tout)
|
|
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
|
|
}
|
|
|
|
type RunesTest struct {
|
|
in string
|
|
out []rune
|
|
lossy bool
|
|
}
|
|
|
|
var RunesTests = []RunesTest{
|
|
{"", []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 {
|
|
tin := []byte(tt.in)
|
|
a := Runes(tin)
|
|
if !runesEqual(a, tt.out) {
|
|
t.Errorf("Runes(%q) = %v; want %v", tin, 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(Runes(%q)) = %x; want %x", tin, s, tin)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
type TrimTest struct {
|
|
f string
|
|
in, cutset, out string
|
|
}
|
|
|
|
var trimTests = []TrimTest{
|
|
{"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"},
|
|
}
|
|
|
|
func TestTrim(t *testing.T) {
|
|
for _, tc := range trimTests {
|
|
name := tc.f
|
|
var f func([]byte, string) []byte
|
|
switch name {
|
|
case "Trim":
|
|
f = Trim
|
|
case "TrimLeft":
|
|
f = TrimLeft
|
|
case "TrimRight":
|
|
f = TrimRight
|
|
default:
|
|
t.Errorf("Undefined trim function %s", name)
|
|
}
|
|
actual := string(f([]byte(tc.in), tc.cutset))
|
|
if actual != tc.out {
|
|
t.Errorf("%s(%q, %q) = %q; want %q", name, tc.in, tc.cutset, actual, tc.out)
|
|
}
|
|
}
|
|
}
|
|
|
|
type predicate struct {
|
|
f func(r 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",
|
|
}
|
|
|
|
type TrimFuncTest struct {
|
|
f predicate
|
|
in, out string
|
|
}
|
|
|
|
func not(p predicate) predicate {
|
|
return predicate{
|
|
func(r rune) bool {
|
|
return !p.f(r)
|
|
},
|
|
"not " + p.name,
|
|
}
|
|
}
|
|
|
|
var trimFuncTests = []TrimFuncTest{
|
|
{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 := string(TrimFunc([]byte(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{
|
|
{"", 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},
|
|
}
|
|
|
|
func TestIndexFunc(t *testing.T) {
|
|
for _, tc := range indexFuncTests {
|
|
first := IndexFunc([]byte(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([]byte(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)
|
|
}
|
|
}
|
|
}
|
|
|
|
type ReplaceTest struct {
|
|
in string
|
|
old, new string
|
|
n int
|
|
out string
|
|
}
|
|
|
|
var ReplaceTests = []ReplaceTest{
|
|
{"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 {
|
|
in := append([]byte(tt.in), "<spare>"...)
|
|
in = in[:len(tt.in)]
|
|
out := Replace(in, []byte(tt.old), []byte(tt.new), tt.n)
|
|
if s := string(out); s != tt.out {
|
|
t.Errorf("Replace(%q, %q, %q, %d) = %q, want %q", tt.in, tt.old, tt.new, tt.n, s, tt.out)
|
|
}
|
|
if cap(in) == cap(out) && &in[:1][0] == &out[:1][0] {
|
|
t.Errorf("Replace(%q, %q, %q, %d) didn't copy", tt.in, tt.old, tt.new, tt.n)
|
|
}
|
|
}
|
|
}
|
|
|
|
type TitleTest struct {
|
|
in, out string
|
|
}
|
|
|
|
var TitleTests = []TitleTest{
|
|
{"", ""},
|
|
{"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 := string(Title([]byte(tt.in))); s != tt.out {
|
|
t.Errorf("Title(%q) = %q, want %q", tt.in, s, tt.out)
|
|
}
|
|
}
|
|
}
|
|
|
|
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([]byte(tt.s), []byte(tt.t)); out != tt.out {
|
|
t.Errorf("EqualFold(%#q, %#q) = %v, want %v", tt.s, tt.t, out, tt.out)
|
|
}
|
|
if out := EqualFold([]byte(tt.t), []byte(tt.s)); out != tt.out {
|
|
t.Errorf("EqualFold(%#q, %#q) = %v, want %v", tt.t, tt.s, out, tt.out)
|
|
}
|
|
}
|
|
}
|