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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,190 @@ | ||
| // +build big | ||
| // | ||
| // Copyright (c) 2018 Uber Technologies, Inc. | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
|
|
||
| package index | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math/rand" | ||
| "os" | ||
| "regexp" | ||
| "regexp/syntax" | ||
| "strings" | ||
| "testing" | ||
| "time" | ||
| "unicode" | ||
|
|
||
| "github.com/leanovate/gopter" | ||
| "github.com/leanovate/gopter/gen" | ||
| "github.com/leanovate/gopter/prop" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| func TestRegexpCompilationProperty(t *testing.T) { | ||
| parameters := gopter.DefaultTestParameters() | ||
| seed := time.Now().UnixNano() | ||
| parameters.MinSuccessfulTests = 100000 | ||
| parameters.MaxSize = 40 | ||
| parameters.Rng = rand.New(rand.NewSource(seed)) | ||
| properties := gopter.NewProperties(parameters) | ||
|
|
||
| properties.Property("Regexp matches same strings after modifications", prop.ForAll( | ||
| func(x *inputCase) (bool, error) { | ||
| compiled := compileRegexp(x.re, t) | ||
|
|
||
| re, err := regexp.Compile(x.re) | ||
| if err != nil { | ||
| return false, fmt.Errorf("unable to compile re [%v]: %v", x.re, err) | ||
| } | ||
| input := []byte(x.str) | ||
|
|
||
| originalMatch := re.Match(input) | ||
| compiledMatch := compiled.Match(input) | ||
| if originalMatch != compiledMatch { | ||
| return false, fmt.Errorf("don't match %v %v %+v", originalMatch, compiled, x) | ||
| } | ||
|
|
||
| return true, nil | ||
| }, | ||
| genInputCase(), | ||
| )) | ||
|
|
||
| reporter := gopter.NewFormatedReporter(true, 160, os.Stdout) | ||
| if !properties.Run(reporter) { | ||
| t.Errorf("failed with initial seed: %d", seed) | ||
| } | ||
| } | ||
|
|
||
| func compileRegexp(x string, t *testing.T) *regexp.Regexp { | ||
| ast, err := parseRegexp(x) | ||
| require.NoError(t, err) | ||
| astp, err := ensureRegexpUnanchored(ast) | ||
| require.NoError(t, err) | ||
| ast2p, err := ensureRegexpAnchored(astp) | ||
| require.NoError(t, err) | ||
| re, err := regexp.Compile(ast2p.String()) | ||
| require.NoError(t, err) | ||
| return re | ||
| } | ||
|
|
||
| func genInputCase() gopter.Gen { | ||
| return genRegexp(unicode.ASCII_Hex_Digit).Map( | ||
| func(reString string, params *gopter.GenParameters) *inputCase { | ||
| val := gen.RegexMatch(reString)(params) | ||
| strAny, ok := val.Retrieve() | ||
| if !ok { | ||
| return nil | ||
| } | ||
| return &inputCase{ | ||
| re: reString, | ||
| str: strAny.(string), | ||
| } | ||
| }).SuchThat(func(ic *inputCase) bool { | ||
| return ic != nil | ||
| }) | ||
| } | ||
|
|
||
| type inputCase struct { | ||
| re string | ||
| str string | ||
| } | ||
|
|
||
| const regexpFlags = syntax.Perl | ||
|
|
||
| func genRegexp(language *unicode.RangeTable) gopter.Gen { | ||
| return genRegexpAst(language).Map(func(r *syntax.Regexp) string { | ||
| return strings.Replace(r.Simplify().String(), "\\", "\\\\", -1) | ||
| }) | ||
| } | ||
|
|
||
| func genRegexpAst(language *unicode.RangeTable) gopter.Gen { | ||
| return gen.OneGenOf( | ||
| genRegexpNoOperands(language), | ||
| genRegexpLiteral(language), | ||
| genRegexpSingleOperands(language), | ||
| genRegexpAnyOperands(language), | ||
| ) | ||
| } | ||
|
|
||
| func genRegexpNoOperands(l *unicode.RangeTable) gopter.Gen { | ||
| return gen.OneConstOf( | ||
| syntax.OpEmptyMatch, | ||
| syntax.OpAnyChar, | ||
| syntax.OpBeginText, | ||
| syntax.OpEndText, | ||
| syntax.OpWordBoundary, | ||
| syntax.OpNoWordBoundary, | ||
| ).Map(func(op syntax.Op) *syntax.Regexp { | ||
| return &syntax.Regexp{ | ||
| Op: op, | ||
| Flags: regexpFlags, | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| func genRegexpLiteral(language *unicode.RangeTable) gopter.Gen { | ||
| return gen.UnicodeString(language).Map(func(s string) *syntax.Regexp { | ||
| return &syntax.Regexp{ | ||
| Op: syntax.OpLiteral, | ||
| Flags: regexpFlags, | ||
| Rune: []rune(s), | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| func genRegexpSingleOperands(l *unicode.RangeTable) gopter.Gen { | ||
| return gopter.CombineGens( | ||
| gen.OneGenOf(genRegexpLiteral(l), genRegexpNoOperands(l)), | ||
| gen.OneConstOf( | ||
| syntax.OpCapture, | ||
| syntax.OpStar, | ||
| syntax.OpPlus, | ||
| syntax.OpQuest, | ||
| syntax.OpRepeat), | ||
| ).Map(func(vals []interface{}) *syntax.Regexp { | ||
| return &syntax.Regexp{ | ||
| Op: vals[1].(syntax.Op), | ||
| Flags: regexpFlags, | ||
| Sub: []*syntax.Regexp{vals[0].(*syntax.Regexp)}, | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| func genRegexpAnyOperands(l *unicode.RangeTable) gopter.Gen { | ||
| return gopter.CombineGens( | ||
| gen.SliceOf( | ||
| gen.OneGenOf( | ||
| genRegexpLiteral(l), | ||
| genRegexpNoOperands(l), | ||
| genRegexpSingleOperands(l), | ||
| )), | ||
| gen.OneConstOf( | ||
| syntax.OpConcat, | ||
| syntax.OpAlternate), | ||
| ).Map(func(vals []interface{}) *syntax.Regexp { | ||
| return &syntax.Regexp{ | ||
| Op: vals[1].(syntax.Op), | ||
| Flags: regexpFlags, | ||
| Sub: vals[0].([]*syntax.Regexp), | ||
| } | ||
| }) | ||
| } |
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