From: Ian Lance Taylor <iant@golang.org>
Date: Tue, 8 Aug 2017 22:50:43 +0000 (-0700)
Subject: testing: don't fail all tests after racy test failure
X-Git-Tag: go1.10beta1~1533
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=a1371756c368e4d85cfb84ac8ffc53180aa4d2f2;p=gostls13.git

testing: don't fail all tests after racy test failure

The code was adding race.Errors to t.raceErrors before checking
Failed, but Failed was using t.raceErrors+race.Errors. We don't want
to change Failed, since that would affect tests themselves, so modify
the harness to not unnecessarily change t.raceErrors.

Updates #19851
Fixes #21338
Change-Id: I7bfdf281f90e045146c92444f1370d55c45221d4
Reviewed-on: https://go-review.googlesource.com/54050
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
---

diff --git a/src/runtime/race/output_test.go b/src/runtime/race/output_test.go
index e73e6b3bfc..13dfc33b47 100644
--- a/src/runtime/race/output_test.go
+++ b/src/runtime/race/output_test.go
@@ -259,4 +259,25 @@ Goroutine [0-9] \(running\) created at:
   runtime\.newextram\(\)
       .*/runtime/proc.go:[0-9]+ \+0x[0-9,a-f]+
 ==================`},
+	{"second_test_passes", "test", "", "atexit_sleep_ms=0", `
+package main_test
+import "testing"
+func TestFail(t *testing.T) {
+	done := make(chan bool)
+	x := 0
+	go func() {
+		x = 42
+		done <- true
+	}()
+	x = 43
+	<-done
+}
+
+func TestPass(t *testing.T) {
+}
+`, `
+==================
+--- FAIL: TestFail \(0...s\)
+.*testing.go:.*: race detected during execution of test
+FAIL`},
 }
diff --git a/src/testing/testing.go b/src/testing/testing.go
index 02b2d730eb..93297b2dca 100644
--- a/src/testing/testing.go
+++ b/src/testing/testing.go
@@ -697,8 +697,7 @@ func tRunner(t *T, fn func(t *T)) {
 	// a call to runtime.Goexit, record the duration and send
 	// a signal saying that the test is done.
 	defer func() {
-		t.raceErrors += race.Errors()
-		if t.raceErrors > 0 {
+		if t.raceErrors+race.Errors() > 0 {
 			t.Errorf("race detected during execution of test")
 		}