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package regexp2
import "testing"
func TestRightToLeft_Basic(t *testing.T) {
re := MustCompile(`foo\d+`, RightToLeft)
s := "0123456789foo4567890foo1foo 0987"
m, err := re.FindStringMatch(s)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "foo1", m.String(); want != got {
t.Fatalf("Match 0 failed, wanted %v, got %v", want, got)
}
m, err = re.FindNextMatch(m)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "foo4567890", m.String(); want != got {
t.Fatalf("Match 1 failed, wanted %v, got %v", want, got)
}
}
func TestRightToLeft_StartAt(t *testing.T) {
re := MustCompile(`\d`, RightToLeft)
m, err := re.FindStringMatchStartingAt("0123", -1)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if m == nil {
t.Fatalf("Expected match")
}
if want, got := "3", m.String(); want != got {
t.Fatalf("Find failed, wanted '%v', got '%v'", want, got)
}
}
func TestRightToLeft_Replace(t *testing.T) {
re := MustCompile(`\d`, RightToLeft)
s := "0123456789foo4567890foo "
str, err := re.Replace(s, "#", -1, 7)
if err != nil {
t.Fatalf("Unexpected err: %v", err)
}
if want, got := "0123456789foo#######foo ", str; want != got {
t.Fatalf("Replace failed, wanted '%v', got '%v'", want, got)
}
}
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