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