all: shorten some tests

Shorten some of the longest tests that run during all.bash.
Removes 7r 50u 21s from all.bash.

After this change, all.bash is under 5 minutes again on my laptop.

For #26473.

Change-Id: Ie0460aa935808d65460408feaed210fbaa1d5d79
Reviewed-on: https://go-review.googlesource.com/c/go/+/177559
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

1 files changed, 7 insertions, 33 deletions

diff --git a/src/runtime/semasleep_test.go b/src/runtime/semasleep_test.go
index b931095619..f5b4a50697 100644
--- a/src/runtime/semasleep_test.go
+++ b/src/runtime/semasleep_test.go
@@ -7,11 +7,7 @@
 package runtime_test
 
 import (
-	"internal/testenv"
-	"io/ioutil"
-	"os"
 	"os/exec"
-	"path/filepath"
 	"syscall"
 	"testing"
 	"time"
@@ -24,39 +20,14 @@ func TestSpuriousWakeupsNeverHangSemasleep(t *testing.T) {
 	if *flagQuick {
 		t.Skip("-quick")
 	}
-	testenv.MustHaveGoBuild(t)
-	tempDir, err := ioutil.TempDir("", "issue-27250")
-	if err != nil {
-		t.Fatalf("Failed to create the temp directory: %v", err)
-	}
-	defer os.RemoveAll(tempDir)
-
-	repro := `
-    package main
-
-    import "time"
 
-    func main() {
-        <-time.After(1 * time.Second)
-    }
-    `
-	mainPath := filepath.Join(tempDir, "main.go")
-	if err := ioutil.WriteFile(mainPath, []byte(repro), 0644); err != nil {
-		t.Fatalf("Failed to create temp file for repro.go: %v", err)
-	}
-	binaryPath := filepath.Join(tempDir, "binary")
-
-	// Build the binary so that we can send the signal to its PID.
-	out, err := exec.Command(testenv.GoToolPath(t), "build", "-o", binaryPath, mainPath).CombinedOutput()
+	exe, err := buildTestProg(t, "testprog")
 	if err != nil {
-		t.Fatalf("Failed to compile the binary: err: %v\nOutput: %s\n", err, out)
-	}
-	if err := os.Chmod(binaryPath, 0755); err != nil {
-		t.Fatalf("Failed to chmod binary: %v", err)
+		t.Fatal(err)
 	}
 
-	// Now run the binary.
-	cmd := exec.Command(binaryPath)
+	start := time.Now()
+	cmd := exec.Command(exe, "After1")
 	if err := cmd.Start(); err != nil {
 		t.Fatalf("Failed to start command: %v", err)
 	}
@@ -85,6 +56,9 @@ func TestSpuriousWakeupsNeverHangSemasleep(t *testing.T) {
 			if err != nil {
 				t.Fatalf("The program returned but unfortunately with an error: %v", err)
 			}
+			if time.Since(start) < 100*time.Millisecond {
+				t.Fatalf("The program stopped too quickly.")
+			}
 			return
 		}
 	}