integration: Add tempdir()HEADmain

This utility function centralizes the creation and error handling for
temporary test directories to run native sim firmware or scripts to
start a real DUT (device under test).

2 files changed, 16 insertions, 5 deletions

diff --git a/integration/execution_test.go b/integration/execution_test.go
index 82fa2b9..3492fa3 100644
--- a/integration/execution_test.go
+++ b/integration/execution_test.go
@@ -22,16 +22,13 @@ func TestExecuteDUT(t *testing.T) {
 		t.Skip("Environment variable '" + ENV_NATIVE_SIM_FIRMWARE + "' not set")
 	}
 
-	dir, err := os.MkdirTemp("", "iot-contact-go-*")
-	if err != nil {
-		t.Skip("Could not create temporary directory")
-	}
+	dir := tempdir(t)
 	defer os.RemoveAll(dir)
 
 	cmd := exec.Command(firmware)
 	cmd.Dir = dir
 
-	err = cmd.Start()
+	err := cmd.Start()
 	if err != nil {
 		t.Fatalf("Could not start native sim firmware: %v", err)
 	}
diff --git a/integration/utils.go b/integration/utils.go
new file mode 100644
index 0000000..12e1f62
--- /dev/null
+++ b/integration/utils.go
@@ -0,0 +1,14 @@
+package integration
+
+import (
+	"os"
+	"testing"
+)
+
+func tempdir(t *testing.T) string {
+	dir, err := os.MkdirTemp("", "iot-contact-go-integration-test-*")
+	if err != nil {
+		t.Skip("Could not create temporary directory for integration test.")
+	}
+	return dir
+}