1 files changed, 128 insertions, 0 deletions
diff --git a/src/testing/internal/testdeps/deps.go b/src/testing/internal/testdeps/deps.go
new file mode 100644
index 0000000..3608d33
--- /dev/null
+++ b/src/testing/internal/testdeps/deps.go
@@ -0,0 +1,128 @@
+// Copyright 2016 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 testdeps provides access to dependencies needed by test execution.
+//
+// This package is imported by the generated main package, which passes
+// TestDeps into testing.Main. This allows tests to use packages at run time
+// without making those packages direct dependencies of package testing.
+// Direct dependencies of package testing are harder to write tests for.
+package testdeps
+
+import (
+	"bufio"
+	"internal/testlog"
+	"io"
+	"regexp"
+	"runtime/pprof"
+	"strings"
+	"sync"
+)
+
+// TestDeps is an implementation of the testing.testDeps interface,
+// suitable for passing to testing.MainStart.
+type TestDeps struct{}
+
+var matchPat string
+var matchRe *regexp.Regexp
+
+func (TestDeps) MatchString(pat, str string) (result bool, err error) {
+	if matchRe == nil || matchPat != pat {
+		matchPat = pat
+		matchRe, err = regexp.Compile(matchPat)
+		if err != nil {
+			return
+		}
+	}
+	return matchRe.MatchString(str), nil
+}
+
+func (TestDeps) StartCPUProfile(w io.Writer) error {
+	return pprof.StartCPUProfile(w)
+}
+
+func (TestDeps) StopCPUProfile() {
+	pprof.StopCPUProfile()
+}
+
+func (TestDeps) WriteProfileTo(name string, w io.Writer, debug int) error {
+	return pprof.Lookup(name).WriteTo(w, debug)
+}
+
+// ImportPath is the import path of the testing binary, set by the generated main function.
+var ImportPath string
+
+func (TestDeps) ImportPath() string {
+	return ImportPath
+}
+
+// testLog implements testlog.Interface, logging actions by package os.
+type testLog struct {
+	mu  sync.Mutex
+	w   *bufio.Writer
+	set bool
+}
+
+func (l *testLog) Getenv(key string) {
+	l.add("getenv", key)
+}
+
+func (l *testLog) Open(name string) {
+	l.add("open", name)
+}
+
+func (l *testLog) Stat(name string) {
+	l.add("stat", name)
+}
+
+func (l *testLog) Chdir(name string) {
+	l.add("chdir", name)
+}
+
+// add adds the (op, name) pair to the test log.
+func (l *testLog) add(op, name string) {
+	if strings.Contains(name, "\n") || name == "" {
+		return
+	}
+
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if l.w == nil {
+		return
+	}
+	l.w.WriteString(op)
+	l.w.WriteByte(' ')
+	l.w.WriteString(name)
+	l.w.WriteByte('\n')
+}
+
+var log testLog
+
+func (TestDeps) StartTestLog(w io.Writer) {
+	log.mu.Lock()
+	log.w = bufio.NewWriter(w)
+	if !log.set {
+		// Tests that define TestMain and then run m.Run multiple times
+		// will call StartTestLog/StopTestLog multiple times.
+		// Checking log.set avoids calling testlog.SetLogger multiple times
+		// (which will panic) and also avoids writing the header multiple times.
+		log.set = true
+		testlog.SetLogger(&log)
+		log.w.WriteString("# test log\n") // known to cmd/go/internal/test/test.go
+	}
+	log.mu.Unlock()
+}
+
+func (TestDeps) StopTestLog() error {
+	log.mu.Lock()
+	defer log.mu.Unlock()
+	err := log.w.Flush()
+	log.w = nil
+	return err
+}
+
+// SetPanicOnExit0 tells the os package whether to panic on os.Exit(0).
+func (TestDeps) SetPanicOnExit0(v bool) {
+	testlog.SetPanicOnExit0(v)
+}