129 lines
3.5 KiB
Go
129 lines
3.5 KiB
Go
// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package fields
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// This file was copied from https://go.googlesource.com/go/+/go1.7.3/src/encoding/json/fold_test.go.
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// Only the license and package were changed.
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import (
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"bytes"
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"strings"
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"testing"
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"unicode/utf8"
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)
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var foldTests = []struct {
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fn func(s, t []byte) bool
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s, t string
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want bool
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}{
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{equalFoldRight, "", "", true},
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{equalFoldRight, "a", "a", true},
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{equalFoldRight, "", "a", false},
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{equalFoldRight, "a", "", false},
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{equalFoldRight, "a", "A", true},
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{equalFoldRight, "AB", "ab", true},
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{equalFoldRight, "AB", "ac", false},
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{equalFoldRight, "sbkKc", "ſbKKc", true},
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{equalFoldRight, "SbKkc", "ſbKKc", true},
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{equalFoldRight, "SbKkc", "ſbKK", false},
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{equalFoldRight, "e", "é", false},
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{equalFoldRight, "s", "S", true},
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{simpleLetterEqualFold, "", "", true},
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{simpleLetterEqualFold, "abc", "abc", true},
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{simpleLetterEqualFold, "abc", "ABC", true},
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{simpleLetterEqualFold, "abc", "ABCD", false},
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{simpleLetterEqualFold, "abc", "xxx", false},
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{asciiEqualFold, "a_B", "A_b", true},
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{asciiEqualFold, "aa@", "aa`", false}, // verify 0x40 and 0x60 aren't case-equivalent
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}
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func TestFold(t *testing.T) {
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for i, tt := range foldTests {
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if got := tt.fn([]byte(tt.s), []byte(tt.t)); got != tt.want {
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t.Errorf("%d. %q, %q = %v; want %v", i, tt.s, tt.t, got, tt.want)
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}
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truth := strings.EqualFold(tt.s, tt.t)
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if truth != tt.want {
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t.Errorf("strings.EqualFold doesn't agree with case %d", i)
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}
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}
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}
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func TestFoldAgainstUnicode(t *testing.T) {
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const bufSize = 5
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buf1 := make([]byte, 0, bufSize)
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buf2 := make([]byte, 0, bufSize)
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var runes []rune
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for i := 0x20; i <= 0x7f; i++ {
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runes = append(runes, rune(i))
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}
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runes = append(runes, kelvin, smallLongEss)
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funcs := []struct {
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name string
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fold func(s, t []byte) bool
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letter bool // must be ASCII letter
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simple bool // must be simple ASCII letter (not 'S' or 'K')
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}{
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{
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name: "equalFoldRight",
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fold: equalFoldRight,
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},
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{
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name: "asciiEqualFold",
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fold: asciiEqualFold,
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simple: true,
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},
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{
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name: "simpleLetterEqualFold",
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fold: simpleLetterEqualFold,
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simple: true,
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letter: true,
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},
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}
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for _, ff := range funcs {
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for _, r := range runes {
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if r >= utf8.RuneSelf {
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continue
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}
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if ff.letter && !isASCIILetter(byte(r)) {
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continue
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}
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if ff.simple && (r == 's' || r == 'S' || r == 'k' || r == 'K') {
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continue
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}
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for _, r2 := range runes {
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buf1 := append(buf1[:0], 'x')
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buf2 := append(buf2[:0], 'x')
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buf1 = buf1[:1+utf8.EncodeRune(buf1[1:bufSize], r)]
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buf2 = buf2[:1+utf8.EncodeRune(buf2[1:bufSize], r2)]
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buf1 = append(buf1, 'x')
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buf2 = append(buf2, 'x')
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want := bytes.EqualFold(buf1, buf2)
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if got := ff.fold(buf1, buf2); got != want {
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t.Errorf("%s(%q, %q) = %v; want %v", ff.name, buf1, buf2, got, want)
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}
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}
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}
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}
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}
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func isASCIILetter(b byte) bool {
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return ('A' <= b && b <= 'Z') || ('a' <= b && b <= 'z')
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}
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