add dtail health check unit test.

1 files changed, 23 insertions, 10 deletions

diff --git a/integrationtests/commons.go b/integrationtests/commons.go
index f789322..f96b532 100644
--- a/integrationtests/commons.go
+++ b/integrationtests/commons.go
@@ -2,6 +2,7 @@ package integrationtests
 
 import (
 	"bufio"
+	"context"
 	"crypto/sha256"
 	"encoding/base64"
 	"fmt"
@@ -9,29 +10,41 @@ import (
 	"os"
 	"os/exec"
 	"strings"
+	"syscall"
 	"testing"
 )
 
-func runCommand(t *testing.T, cmd string, args []string, stdoutFile string) error {
+func runCommand(t *testing.T, cmd string, args []string, stdoutFile string) (int, error) {
+	return runCommandContext(t, context.TODO(), cmd, args, stdoutFile)
+}
+
+func runCommandContext(t *testing.T, ctx context.Context, cmd string, args []string, stdoutFile string) (int, error) {
 	if _, err := os.Stat(cmd); err != nil {
-		return fmt.Errorf("No such binary %s, please compile first (%v)", cmd, err)
+		return -1, fmt.Errorf("No such binary %s, please compile first (%v)", cmd, err)
 	}
 
-	t.Log("Executing command:", cmd, strings.Join(args, " "))
-	bytes, err := exec.Command(cmd, args...).Output()
-	if err != nil {
-		return err
-	}
+	t.Log("Running command:", cmd, strings.Join(args, " "))
+	bytes, cmdErr := exec.CommandContext(ctx, cmd, args...).Output()
 
 	t.Log("Writing stdout to file", stdoutFile)
 	fd, err := os.Create(stdoutFile)
 	if err != nil {
-		return err
+		return -1, err
 	}
+	defer fd.Close()
 	fd.Write(bytes)
-	fd.Close()
 
-	return nil
+	return exitCodeFromError(cmdErr), err
+}
+
+func exitCodeFromError(err error) int {
+	if err != nil {
+		if exitError, ok := err.(*exec.ExitError); ok {
+			ws := exitError.Sys().(syscall.WaitStatus)
+			return ws.ExitStatus()
+		}
+	}
+	return 0
 }
 
 // Checks whether both files have the same lines (order doesn't matter)