1 package regexp2
2
3 import "testing"
4
5 func TestRightToLeft_Basic(t *testing.T) {
6 re := MustCompile(`foo\d+`, RightToLeft)
7 s := "0123456789foo4567890foo1foo 0987"
8
9 m, err := re.FindStringMatch(s)
10 if err != nil {
11 t.Fatalf("Unexpected err: %v", err)
12 }
13 if want, got := "foo1", m.String(); want != got {
14 t.Fatalf("Match 0 failed, wanted %v, got %v", want, got)
15 }
16
17 m, err = re.FindNextMatch(m)
18 if err != nil {
19 t.Fatalf("Unexpected err: %v", err)
20 }
21 if want, got := "foo4567890", m.String(); want != got {
22 t.Fatalf("Match 1 failed, wanted %v, got %v", want, got)
23 }
24 }
25
26 func TestRightToLeft_StartAt(t *testing.T) {
27 re := MustCompile(`\d`, RightToLeft)
28
29 m, err := re.FindStringMatchStartingAt("0123", -1)
30 if err != nil {
31 t.Fatalf("Unexpected err: %v", err)
32 }
33 if m == nil {
34 t.Fatalf("Expected match")
35 }
36 if want, got := "3", m.String(); want != got {
37 t.Fatalf("Find failed, wanted '%v', got '%v'", want, got)
38 }
39
40 }
41
42 func TestRightToLeft_Replace(t *testing.T) {
43 re := MustCompile(`\d`, RightToLeft)
44 s := "0123456789foo4567890foo "
45 str, err := re.Replace(s, "#", -1, 7)
46 if err != nil {
47 t.Fatalf("Unexpected err: %v", err)
48 }
49 if want, got := "0123456789foo#######foo ", str; want != got {
50 t.Fatalf("Replace failed, wanted '%v', got '%v'", want, got)
51 }
52 }
53
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