1 files changed, 114 insertions, 0 deletions
diff --git a/src/regexp/syntax/prog_test.go b/src/regexp/syntax/prog_test.go
new file mode 100644
index 000000000..50bfa3d4b
--- /dev/null
+++ b/src/regexp/syntax/prog_test.go
@@ -0,0 +1,114 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package syntax
+
+import "testing"
+
+var compileTests = []struct {
+	Regexp string
+	Prog   string
+}{
+	{"a", `  0	fail
+  1*	rune1 "a" -> 2
+  2	match
+`},
+	{"[A-M][n-z]", `  0	fail
+  1*	rune "AM" -> 2
+  2	rune "nz" -> 3
+  3	match
+`},
+	{"", `  0	fail
+  1*	nop -> 2
+  2	match
+`},
+	{"a?", `  0	fail
+  1	rune1 "a" -> 3
+  2*	alt -> 1, 3
+  3	match
+`},
+	{"a??", `  0	fail
+  1	rune1 "a" -> 3
+  2*	alt -> 3, 1
+  3	match
+`},
+	{"a+", `  0	fail
+  1*	rune1 "a" -> 2
+  2	alt -> 1, 3
+  3	match
+`},
+	{"a+?", `  0	fail
+  1*	rune1 "a" -> 2
+  2	alt -> 3, 1
+  3	match
+`},
+	{"a*", `  0	fail
+  1	rune1 "a" -> 2
+  2*	alt -> 1, 3
+  3	match
+`},
+	{"a*?", `  0	fail
+  1	rune1 "a" -> 2
+  2*	alt -> 3, 1
+  3	match
+`},
+	{"a+b+", `  0	fail
+  1*	rune1 "a" -> 2
+  2	alt -> 1, 3
+  3	rune1 "b" -> 4
+  4	alt -> 3, 5
+  5	match
+`},
+	{"(a+)(b+)", `  0	fail
+  1*	cap 2 -> 2
+  2	rune1 "a" -> 3
+  3	alt -> 2, 4
+  4	cap 3 -> 5
+  5	cap 4 -> 6
+  6	rune1 "b" -> 7
+  7	alt -> 6, 8
+  8	cap 5 -> 9
+  9	match
+`},
+	{"a+|b+", `  0	fail
+  1	rune1 "a" -> 2
+  2	alt -> 1, 6
+  3	rune1 "b" -> 4
+  4	alt -> 3, 6
+  5*	alt -> 1, 3
+  6	match
+`},
+	{"A[Aa]", `  0	fail
+  1*	rune1 "A" -> 2
+  2	rune "A"/i -> 3
+  3	match
+`},
+	{"(?:(?:^).)", `  0	fail
+  1*	empty 4 -> 2
+  2	anynotnl -> 3
+  3	match
+`},
+}
+
+func TestCompile(t *testing.T) {
+	for _, tt := range compileTests {
+		re, _ := Parse(tt.Regexp, Perl)
+		p, _ := Compile(re)
+		s := p.String()
+		if s != tt.Prog {
+			t.Errorf("compiled %#q:\n--- have\n%s---\n--- want\n%s---", tt.Regexp, s, tt.Prog)
+		}
+	}
+}
+
+func BenchmarkEmptyOpContext(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		var r1 rune = -1
+		for _, r2 := range "foo, bar, baz\nsome input text.\n" {
+			EmptyOpContext(r1, r2)
+			r1 = r2
+		}
+		EmptyOpContext(r1, -1)
+	}
+}