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restructure_test.go
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restructure_test.go
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package restructure
import (
"encoding/json"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func assertRegion(t *testing.T, s string, begin int, end int, r *Submatch) {
assert.NotNil(t, r)
assert.Equal(t, s, string(r.Bytes))
assert.EqualValues(t, begin, r.Begin)
assert.EqualValues(t, end, r.End)
}
type DotName struct {
Dot string `regexp:"\\."`
Name string `regexp:"\\w+"`
}
type DotExpr struct {
_ struct{} `regexp:"^"`
Head string `regexp:"\\w+"`
Tail *DotName `regexp:"?"`
_ struct{} `regexp:"$"`
}
func TestMatchNameDotName(t *testing.T) {
pattern, err := Compile(DotExpr{}, Options{})
require.NoError(t, err)
var v DotExpr
assert.True(t, pattern.Find(&v, "foo.bar"))
assert.Equal(t, "foo", v.Head)
require.NotNil(t, v.Tail)
assert.Equal(t, ".", v.Tail.Dot)
assert.Equal(t, "bar", v.Tail.Name)
}
func TestMatchNameDotNameHeadOnly(t *testing.T) {
pattern, err := Compile(DotExpr{}, Options{})
require.NoError(t, err)
var v DotExpr
assert.True(t, pattern.Find(&v, "head"))
assert.Equal(t, "head", v.Head)
assert.Nil(t, v.Tail)
}
func TestMatchNameDotNameFails(t *testing.T) {
pattern, err := Compile(DotExpr{}, Options{})
require.NoError(t, err)
var v DotExpr
assert.False(t, pattern.Find(&v, ".oops"))
}
type URL struct {
_ string `regexp:"^"`
Scheme string `regexp:"[[:alpha:]]+" json:"scheme"`
_ string `regexp:"://"`
Host string `regexp:".*" json:"host"`
_ string `regexp:"$"`
}
func TestMatchURL(t *testing.T) {
pattern, err := Compile(URL{}, Options{})
require.NoError(t, err)
var v URL
require.True(t, pattern.Find(&v, "http://example.com"))
assert.Equal(t, "http", v.Scheme)
assert.Equal(t, "example.com", v.Host)
}
func TestCombinationWithJSONTags(t *testing.T) {
pattern, err := Compile(URL{}, Options{})
require.NoError(t, err)
var v URL
require.True(t, pattern.Find(&v, "http://example.com"))
js, err := json.Marshal(&v)
require.NoError(t, err)
assert.Equal(t, "{\"scheme\":\"http\",\"host\":\"example.com\"}", string(js))
}
type PtrURL struct {
_ struct{} `regexp:"^"`
Scheme *string `regexp:"[[:alpha:]]+"`
_ struct{} `regexp:"://"`
Host *string `regexp:".*"`
_ struct{} `regexp:"$"`
}
func TestMatchPtrURL(t *testing.T) {
pattern, err := Compile(PtrURL{}, Options{})
require.NoError(t, err)
var v PtrURL
require.True(t, pattern.Find(&v, "http://example.com"))
require.NotNil(t, v.Scheme)
require.NotNil(t, v.Host)
assert.Equal(t, "http", *v.Scheme)
assert.Equal(t, "example.com", *v.Host)
}
func TestMatchPtrURLFailed(t *testing.T) {
pattern, err := Compile(PtrURL{}, Options{})
require.NoError(t, err)
var v PtrURL
require.False(t, pattern.Find(&v, "oops"))
assert.Nil(t, v.Scheme)
assert.Nil(t, v.Host)
}
type NakedURL struct {
_ string `^`
Scheme string `[[:alpha:]]+`
_ string `://`
Host string `.*`
_ string `$`
}
func TestMatchNakedURL(t *testing.T) {
pattern, err := Compile(NakedURL{}, Options{})
require.NoError(t, err)
var v NakedURL
require.True(t, pattern.Find(&v, "http://example.com"))
assert.Equal(t, "http", v.Scheme)
assert.Equal(t, "example.com", v.Host)
}
type Nothing struct {
X string
}
func TestEmptyPattern(t *testing.T) {
pattern, err := Compile(Nothing{}, Options{})
require.NoError(t, err)
var v Nothing
require.True(t, pattern.Find(&v, "abc"))
}
type Malformed struct {
X string `regexp:"\w"` // this is malformed because \w is not a valid escape sequence
}
func TestErrorOnMalformedTag(t *testing.T) {
_, err := Compile(Malformed{}, Options{})
assert.Error(t, err)
}
type HasSubcaptures struct {
Name string `a(bc)?d`
}
func TestRemoveSubcaptures(t *testing.T) {
pattern, err := Compile(HasSubcaptures{}, Options{})
require.NoError(t, err)
var v HasSubcaptures
require.True(t, pattern.Find(&v, "abcd"))
assert.Equal(t, "abcd", v.Name)
}
type DotNameRegion struct {
Dot *Submatch `regexp:"\\."`
Name *Submatch `regexp:"\\w+"`
}
type DotExprRegion struct {
_ struct{} `regexp:"^"`
Head Submatch `regexp:"\\w+"`
Tail *DotNameRegion `regexp:"?"`
_ struct{} `regexp:"$"`
}
func TestMatchNameDotNameRegion(t *testing.T) {
pattern, err := Compile(DotExprRegion{}, Options{})
require.NoError(t, err)
var v DotExprRegion
assert.True(t, pattern.Find(&v, "foo.bar"))
assertRegion(t, "foo", 0, 3, &v.Head)
assert.NotNil(t, v.Tail)
assertRegion(t, ".", 3, 4, v.Tail.Dot)
assertRegion(t, "bar", 4, 7, v.Tail.Name)
}
type DotNamePos struct {
Begin Pos
Dot string `regexp:"\\."`
Middle Pos
Name string `regexp:"\\w+"`
End Pos
}
type DotExprPos struct {
Begin Pos
_ struct{} `regexp:"^"`
Head string `regexp:"\\w+"`
Middle Pos
Tail *DotNamePos `regexp:"?"`
_ struct{} `regexp:"$"`
End Pos
}
func TestMatchNameDotNamePos(t *testing.T) {
pattern, err := Compile(DotExprPos{}, Options{})
require.NoError(t, err)
var v DotExprPos
assert.True(t, pattern.Find(&v, "foo.bar"))
assert.EqualValues(t, 0, v.Begin)
assert.EqualValues(t, 3, v.Middle)
assert.EqualValues(t, 3, v.Tail.Begin)
assert.EqualValues(t, 4, v.Tail.Middle)
assert.EqualValues(t, 7, v.Tail.End)
assert.EqualValues(t, 7, v.End)
}
type DegeneratePos struct {
X Pos
Y Pos
}
func TestDegeneratePos(t *testing.T) {
// This tests what happens if there are degenerate position captures
pattern, err := Compile(DegeneratePos{}, Options{})
require.NoError(t, err)
var v DegeneratePos
assert.True(t, pattern.Find(&v, "abc"))
assert.EqualValues(t, 0, v.X)
assert.EqualValues(t, 0, v.Y)
}
type UnexportedPos struct {
Exported Pos
unexported Pos
_ struct{} `regexp:"$"`
}
func TestUnexportedPos(t *testing.T) {
// This tests what happens if there are non-exported Pos fields
pattern, err := Compile(UnexportedPos{}, Options{})
require.NoError(t, err)
var v UnexportedPos
assert.True(t, pattern.Find(&v, "abc"))
assert.EqualValues(t, 3, v.Exported)
assert.EqualValues(t, 0, v.unexported) // should be ignored
}
type Word struct {
S string `\w+`
}
func TestFindAllWords_Simple(t *testing.T) {
pattern := MustCompile(Word{}, Options{})
var words []Word
pattern.FindAll(&words, "ham is spam", -1)
require.Len(t, words, 3)
assert.EqualValues(t, "ham", words[0].S)
assert.EqualValues(t, "is", words[1].S)
assert.EqualValues(t, "spam", words[2].S)
}
func TestFindAllWords_Ptr(t *testing.T) {
pattern := MustCompile(Word{}, Options{})
var words []*Word
pattern.FindAll(&words, "ham is spam", -1)
require.Len(t, words, 3)
assert.EqualValues(t, "ham", words[0].S)
assert.EqualValues(t, "is", words[1].S)
assert.EqualValues(t, "spam", words[2].S)
}
func TestFindAllWords_NoMatches(t *testing.T) {
pattern := MustCompile(Word{}, Options{})
var words []*Word
pattern.FindAll(&words, "*&!", -1)
require.Empty(t, words)
}
func TestFindAllWords_ByValueSlicePanics(t *testing.T) {
pattern := MustCompile(Word{}, Options{})
var words []*Word
// This should panic because words is passed by value not by pointer:
assert.Panics(t, func() { pattern.FindAll(words, "*&!", -1) })
}
type WordSubmatch struct {
S *Submatch `\w+`
}
func TestFindAllWords_Regions(t *testing.T) {
pattern := MustCompile(WordSubmatch{}, Options{})
var words []*WordSubmatch
pattern.FindAll(&words, "ham is spam", -1)
require.Len(t, words, 3)
assertRegion(t, "ham", 0, 3, words[0].S)
assertRegion(t, "is", 4, 6, words[1].S)
assertRegion(t, "spam", 7, 11, words[2].S)
}