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replace_test.go
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replace_test.go
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package regexp2
import (
"strconv"
"testing"
)
func TestReplace_Basic(t *testing.T) {
re := MustCompile(`test`, 0)
str, err := re.Replace("this is a test", "unit", -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "this is a unit", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_NamedGroup(t *testing.T) {
re := MustCompile(`[^ ]+\s(?<time>)`, 0)
str, err := re.Replace("08/10/99 16:00", "${time}", -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "16:00", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_IgnoreCaseUpper(t *testing.T) {
re := MustCompile(`dog`, IgnoreCase)
str, err := re.Replace("my dog has fleas", "CAT", -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "my CAT has fleas", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_IgnoreCaseLower(t *testing.T) {
re := MustCompile(`olang`, IgnoreCase)
str, err := re.Replace("GoLAnG", "olang", -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "Golang", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_NumberGroup(t *testing.T) {
re := MustCompile(`D\.(.+)`, None)
str, err := re.Replace("D.Bau", "David $1", -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "David Bau", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_LimitCount(t *testing.T) {
re := MustCompile(`a`, None)
str, err := re.Replace("aaaaa", "b", 0, 2)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "bbaaa", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_LimitCountSlice(t *testing.T) {
re := MustCompile(`a`, None)
myStr := "aaaaa"
str, err := re.Replace(myStr, "b", 3, 2)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "aaabb", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_BeginBeforeAfterEnd(t *testing.T) {
re := MustCompile(`a`, None)
myStr := "a test a blah and a"
str, err := re.Replace(myStr, "stuff", -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "stuff test stuff blstuffh stuffnd stuff", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_BadSyntax(t *testing.T) {
re := MustCompile(`a`, None)
myStr := "this is a test"
_, err := re.Replace(myStr, `$5000000000`, -1, -1)
if err == nil {
t.Fatalf("Expected err")
}
}
func TestReplaceFunc_Basic(t *testing.T) {
re := MustCompile(`test`, None)
str, err := re.ReplaceFunc("this is a test", func(m Match) string { return "unit" }, -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "this is a unit", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplaceFunc_Multiple(t *testing.T) {
re := MustCompile(`test`, None)
count := 0
str, err := re.ReplaceFunc("This test is another test for stuff", func(m Match) string {
count++
return strconv.Itoa(count)
}, -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "This 1 is another 2 for stuff", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplaceFunc_Groups(t *testing.T) {
re := MustCompile(`test(?<sub>ing)?`, None)
count := 0
str, err := re.ReplaceFunc("This testing is another test testingly junk", func(m Match) string {
count++
if m.GroupByName("sub").Length > 0 {
// we have an "ing", make it negative
return strconv.Itoa(count * -1)
}
return strconv.Itoa(count)
}, -1, -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "This -1 is another 2 -3ly junk", str; want != got {
t.Fatalf("Replace failed, wanted %v, got %v", want, got)
}
}
func TestReplace_RefNumsDollarAmbiguous(t *testing.T) {
re := MustCompile("(123)hello(789)", None)
res, err := re.Replace("123hello789", "$1456$2", -1, -1)
if err != nil {
t.Fatal(err)
}
if want, got := "$1456789", res; want != got {
t.Fatalf("Wrong result: %s", got)
}
}
func TestReplace_NestedGroups(t *testing.T) {
re := MustCompile(`(\p{Sc}\s?)?(\d+\.?((?<=\.)\d+)?)(?(1)|\s?\p{Sc})?`, None)
res, err := re.Replace("$17.43 €2 16.33 £0.98 0.43 £43 12€ 17", "$2", -1, -1)
if err != nil {
t.Fatal(err)
}
if want, got := "17.43 2 16.33 0.98 0.43 43 12 17", res; want != got {
t.Fatalf("Wrong result: %s", got)
}
}