1package regexp2 2 3import "testing" 4 5func 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 26func 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 42func 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