1// Copyright 2017 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package testing
6
7import (
8	"bytes"
9	"regexp"
10	"strings"
11)
12
13func TestTBHelper(t *T) {
14	var buf bytes.Buffer
15	ctx := newTestContext(1, newMatcher(regexp.MatchString, "", ""))
16	t1 := &T{
17		common: common{
18			signal: make(chan bool),
19			w:      &buf,
20		},
21		context: ctx,
22	}
23	t1.Run("Test", testHelper)
24
25	want := `--- FAIL: Test (?s)
26helperfuncs_test.go:12: 0
27helperfuncs_test.go:33: 1
28helperfuncs_test.go:21: 2
29helperfuncs_test.go:35: 3
30helperfuncs_test.go:42: 4
31--- FAIL: Test/sub (?s)
32helperfuncs_test.go:45: 5
33helperfuncs_test.go:21: 6
34helperfuncs_test.go:44: 7
35helperfuncs_test.go:56: 8
36--- FAIL: Test/sub2 (?s)
37helperfuncs_test.go:71: 11
38helperfuncs_test.go:75: recover 12
39helperfuncs_test.go:64: 9
40helperfuncs_test.go:60: 10
41`
42	lines := strings.Split(buf.String(), "\n")
43	durationRE := regexp.MustCompile(`\(.*\)$`)
44	for i, line := range lines {
45		line = strings.TrimSpace(line)
46		line = durationRE.ReplaceAllString(line, "(?s)")
47		lines[i] = line
48	}
49	got := strings.Join(lines, "\n")
50	if got != want {
51		t.Errorf("got output:\n\n%s\nwant:\n\n%s", got, want)
52	}
53}
54
55func TestTBHelperParallel(t *T) {
56	var buf bytes.Buffer
57	ctx := newTestContext(1, newMatcher(regexp.MatchString, "", ""))
58	t1 := &T{
59		common: common{
60			signal: make(chan bool),
61			w:      &buf,
62		},
63		context: ctx,
64	}
65	t1.Run("Test", parallelTestHelper)
66
67	lines := strings.Split(strings.TrimSpace(buf.String()), "\n")
68	if len(lines) != 6 {
69		t.Fatalf("parallelTestHelper gave %d lines of output; want 6", len(lines))
70	}
71	want := "helperfuncs_test.go:21: parallel"
72	if got := strings.TrimSpace(lines[1]); got != want {
73		t.Errorf("got output line %q; want %q", got, want)
74	}
75}
76
77type noopWriter int
78
79func (nw *noopWriter) Write(b []byte) (int, error) { return len(b), nil }
80
81func BenchmarkTBHelper(b *B) {
82	w := noopWriter(0)
83	ctx := newTestContext(1, newMatcher(regexp.MatchString, "", ""))
84	t1 := &T{
85		common: common{
86			signal: make(chan bool),
87			w:      &w,
88		},
89		context: ctx,
90	}
91	f1 := func() {
92		t1.Helper()
93	}
94	f2 := func() {
95		t1.Helper()
96	}
97	b.ResetTimer()
98	b.ReportAllocs()
99	for i := 0; i < b.N; i++ {
100		if i&1 == 0 {
101			f1()
102		} else {
103			f2()
104		}
105	}
106}
107