diff options
Diffstat (limited to 'modules/charset/charset_test.go')
| -rw-r--r-- | modules/charset/charset_test.go | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/modules/charset/charset_test.go b/modules/charset/charset_test.go new file mode 100644 index 0000000..42c8415 --- /dev/null +++ b/modules/charset/charset_test.go @@ -0,0 +1,385 @@ +// Copyright 2019 The Gitea Authors. All rights reserved. +// SPDX-License-Identifier: MIT + +package charset + +import ( + "bytes" + "io" + "strings" + "testing" + + "code.gitea.io/gitea/modules/setting" + + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" +) + +func resetDefaultCharsetsOrder() { + defaultDetectedCharsetsOrder := make([]string, 0, len(setting.Repository.DetectedCharsetsOrder)) + for _, charset := range setting.Repository.DetectedCharsetsOrder { + defaultDetectedCharsetsOrder = append(defaultDetectedCharsetsOrder, strings.ToLower(strings.TrimSpace(charset))) + } + setting.Repository.DetectedCharsetScore = map[string]int{} + i := 0 + for _, charset := range defaultDetectedCharsetsOrder { + canonicalCharset := strings.ToLower(strings.TrimSpace(charset)) + if _, has := setting.Repository.DetectedCharsetScore[canonicalCharset]; !has { + setting.Repository.DetectedCharsetScore[canonicalCharset] = i + i++ + } + } +} + +func TestMaybeRemoveBOM(t *testing.T) { + res := MaybeRemoveBOM([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) + assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) + + res = MaybeRemoveBOM([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) + assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) +} + +func TestToUTF8(t *testing.T) { + resetDefaultCharsetsOrder() + var res string + var err error + + // Note: golang compiler seems so behave differently depending on the current + // locale, so some conversions might behave differently. For that reason, we don't + // depend on particular conversions but in expected behaviors. + + res, err = ToUTF8([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) + require.NoError(t, err) + assert.Equal(t, "ABC", res) + + // "áéíóú" + res, err = ToUTF8([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) + require.NoError(t, err) + assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res)) + + // "áéíóú" + res, err = ToUTF8([]byte{ + 0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, + 0xc3, 0xba, + }, ConvertOpts{}) + require.NoError(t, err) + assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res)) + + res, err = ToUTF8([]byte{ + 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, + 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, + }, ConvertOpts{}) + require.NoError(t, err) + stringMustStartWith(t, "Hola,", res) + stringMustEndWith(t, "AAA.", res) + + res, err = ToUTF8([]byte{ + 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, + 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, + }, ConvertOpts{}) + require.NoError(t, err) + stringMustStartWith(t, "Hola,", res) + stringMustEndWith(t, "AAA.", res) + + res, err = ToUTF8([]byte{ + 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, + 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, + }, ConvertOpts{}) + require.NoError(t, err) + stringMustStartWith(t, "Hola,", res) + stringMustEndWith(t, "AAA.", res) + + // Japanese (Shift-JIS) + // 日属秘ぞしちゅ。 + res, err = ToUTF8([]byte{ + 0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, + 0xBF, 0x82, 0xE3, 0x81, 0x42, + }, ConvertOpts{}) + require.NoError(t, err) + assert.Equal(t, []byte{ + 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, + 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, + }, + []byte(res)) + + res, err = ToUTF8([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) + require.NoError(t, err) + assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, []byte(res)) +} + +func TestToUTF8WithFallback(t *testing.T) { + resetDefaultCharsetsOrder() + // "ABC" + res := ToUTF8WithFallback([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) + assert.Equal(t, []byte{0x41, 0x42, 0x43}, res) + + // "áéíóú" + res = ToUTF8WithFallback([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) + assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) + + // UTF8 BOM + "áéíóú" + res = ToUTF8WithFallback([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) + assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) + + // "Hola, así cómo ños" + res = ToUTF8WithFallback([]byte{ + 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, + 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73, + }, ConvertOpts{}) + assert.Equal(t, []byte{ + 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, + 0xC3, 0xB3, 0x6D, 0x6F, 0x20, 0xC3, 0xB1, 0x6F, 0x73, + }, res) + + // "Hola, así cómo " + minmatch := []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20} + + res = ToUTF8WithFallback([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73}, ConvertOpts{}) + // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those + assert.Equal(t, minmatch, res[0:len(minmatch)]) + + res = ToUTF8WithFallback([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73}, ConvertOpts{}) + // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those + assert.Equal(t, minmatch, res[0:len(minmatch)]) + + // Japanese (Shift-JIS) + // "日属秘ぞしちゅ。" + res = ToUTF8WithFallback([]byte{0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 0xBF, 0x82, 0xE3, 0x81, 0x42}, ConvertOpts{}) + assert.Equal(t, []byte{ + 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, + 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, + }, res) + + res = ToUTF8WithFallback([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) + assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res) +} + +func TestToUTF8DropErrors(t *testing.T) { + resetDefaultCharsetsOrder() + // "ABC" + res := ToUTF8DropErrors([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) + assert.Equal(t, []byte{0x41, 0x42, 0x43}, res) + + // "áéíóú" + res = ToUTF8DropErrors([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) + assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) + + // UTF8 BOM + "áéíóú" + res = ToUTF8DropErrors([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) + assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) + + // "Hola, así cómo ños" + res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73}, ConvertOpts{}) + assert.Equal(t, []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73}, res[:8]) + assert.Equal(t, []byte{0x73}, res[len(res)-1:]) + + // "Hola, así cómo " + minmatch := []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20} + + res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73}, ConvertOpts{}) + // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those + assert.Equal(t, minmatch, res[0:len(minmatch)]) + + res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73}, ConvertOpts{}) + // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those + assert.Equal(t, minmatch, res[0:len(minmatch)]) + + // Japanese (Shift-JIS) + // "日属秘ぞしちゅ。" + res = ToUTF8DropErrors([]byte{0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 0xBF, 0x82, 0xE3, 0x81, 0x42}, ConvertOpts{}) + assert.Equal(t, []byte{ + 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, + 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, + }, res) + + res = ToUTF8DropErrors([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) + assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res) +} + +func TestDetectEncoding(t *testing.T) { + resetDefaultCharsetsOrder() + testSuccess := func(b []byte, expected string) { + encoding, err := DetectEncoding(b) + require.NoError(t, err) + assert.Equal(t, expected, encoding) + } + // utf-8 + b := []byte("just some ascii") + testSuccess(b, "UTF-8") + + // utf-8-sig: "hey" (with BOM) + b = []byte{0xef, 0xbb, 0xbf, 0x68, 0x65, 0x79} + testSuccess(b, "UTF-8") + + // utf-16: "hey<accented G>" + b = []byte{0xff, 0xfe, 0x68, 0x00, 0x65, 0x00, 0x79, 0x00, 0xf4, 0x01} + testSuccess(b, "UTF-16LE") + + // iso-8859-1: d<accented e>cor<newline> + b = []byte{0x44, 0xe9, 0x63, 0x6f, 0x72, 0x0a} + encoding, err := DetectEncoding(b) + require.NoError(t, err) + assert.Contains(t, encoding, "ISO-8859-1") + + old := setting.Repository.AnsiCharset + setting.Repository.AnsiCharset = "placeholder" + defer func() { + setting.Repository.AnsiCharset = old + }() + testSuccess(b, "placeholder") + + // invalid bytes + b = []byte{0xfa} + _, err = DetectEncoding(b) + require.Error(t, err) +} + +func stringMustStartWith(t *testing.T, expected, value string) { + assert.Equal(t, expected, value[:len(expected)]) +} + +func stringMustEndWith(t *testing.T, expected, value string) { + assert.Equal(t, expected, value[len(value)-len(expected):]) +} + +func TestToUTF8WithFallbackReader(t *testing.T) { + resetDefaultCharsetsOrder() + + for testLen := 0; testLen < 2048; testLen++ { + pattern := " test { () }\n" + input := "" + for len(input) < testLen { + input += pattern + } + input = input[:testLen] + input += "// Выключаем" + rd := ToUTF8WithFallbackReader(bytes.NewReader([]byte(input)), ConvertOpts{}) + r, _ := io.ReadAll(rd) + assert.EqualValuesf(t, input, string(r), "testing string len=%d", testLen) + } + + truncatedOneByteExtension := failFastBytes + encoding, _ := DetectEncoding(truncatedOneByteExtension) + assert.Equal(t, "UTF-8", encoding) + + truncatedTwoByteExtension := failFastBytes + truncatedTwoByteExtension[len(failFastBytes)-1] = 0x9b + truncatedTwoByteExtension[len(failFastBytes)-2] = 0xe2 + + encoding, _ = DetectEncoding(truncatedTwoByteExtension) + assert.Equal(t, "UTF-8", encoding) + + truncatedThreeByteExtension := failFastBytes + truncatedThreeByteExtension[len(failFastBytes)-1] = 0x92 + truncatedThreeByteExtension[len(failFastBytes)-2] = 0x9f + truncatedThreeByteExtension[len(failFastBytes)-3] = 0xf0 + + encoding, _ = DetectEncoding(truncatedThreeByteExtension) + assert.Equal(t, "UTF-8", encoding) +} + +var failFastBytes = []byte{ + 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70, 0x61, 0x63, 0x68, 0x65, 0x2e, 0x74, 0x6f, + 0x6f, 0x6c, 0x73, 0x2e, 0x61, 0x6e, 0x74, 0x2e, 0x74, 0x61, 0x73, 0x6b, 0x64, 0x65, 0x66, 0x73, 0x2e, 0x63, 0x6f, 0x6e, + 0x64, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x4f, 0x73, 0x0a, 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x6f, 0x72, 0x67, + 0x2e, 0x73, 0x70, 0x72, 0x69, 0x6e, 0x67, 0x66, 0x72, 0x61, 0x6d, 0x65, 0x77, 0x6f, 0x72, 0x6b, 0x2e, 0x62, 0x6f, 0x6f, + 0x74, 0x2e, 0x67, 0x72, 0x61, 0x64, 0x6c, 0x65, 0x2e, 0x74, 0x61, 0x73, 0x6b, 0x73, 0x2e, 0x72, 0x75, 0x6e, 0x2e, 0x42, + 0x6f, 0x6f, 0x74, 0x52, 0x75, 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