Skip empty example (#270)

* skip empty examples that contain no tf files

* refactor code

test/e2e/quickstart_test.go

@@ -1,15 +1,17 @@
 package e2e
 
 import (
-	"github.com/gruntwork-io/terratest/modules/files"
+	"fmt"
-	"github.com/gruntwork-io/terratest/modules/packer"
-	test_structure "github.com/gruntwork-io/terratest/modules/test-structure"
-	"github.com/stretchr/testify/require"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 
+	"github.com/gruntwork-io/terratest/modules/files"
+	"github.com/gruntwork-io/terratest/modules/packer"
+	test_structure "github.com/gruntwork-io/terratest/modules/test-structure"
+	"github.com/stretchr/testify/require"
+
 	helper "github.com/Azure/terraform-module-test-helper"
 	"github.com/gruntwork-io/terratest/modules/terraform"
 )
@@ -35,14 +37,11 @@ func Test_Quickstarts(t *testing.T) {
 	folders = removeDuplicates(folders)
 	for _, f := range folders {
 		f = strings.TrimSpace(f)
-		if filepath.Dir(f) != "quickstart" {
-			continue
-		}
 		rootPath := filepath.Join("..", "..")
-		path := filepath.Join(rootPath, f)
+		if skip(rootPath, f) {
-		if !files.IsExistingDir(path) {
 			continue
 		}
+
 		test, ok := speicalTests[f]
 		if !ok {
 			test = func(t *testing.T) {
@@ -63,14 +62,35 @@ func allExamples() ([]string, error) {
 	}
 	var r []string
 	for _, f := range examples {
-		if !f.IsDir() {
-			continue
-		}
 		r = append(r, filepath.Join("quickstart", f.Name()))
 	}
 	return r, nil
 }
 
+func skip(rootPath string, f string) bool {
+	f = filepath.Join(rootPath, f)
+	if !files.IsExistingDir(f) {
+		return true
+	}
+	if !strings.HasSuffix(filepath.Dir(f), fmt.Sprintf("%squickstart", string(os.PathSeparator))) {
+		return true
+	}
+	return !containsTerraformFile(f)
+}
+
+func containsTerraformFile(f string) bool {
+	dir, err := os.ReadDir(f)
+	if err != nil {
+		return false
+	}
+	for _, entry := range dir {
+		if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".tf") {
+			return true
+		}
+	}
+	return false
+}
+
 func test201VmssPackerJumpbox(t *testing.T) {
 	examplePath := filepath.Join("..", "..", "quickstart", "201-vmss-packer-jumpbox")
 	examplePath = test_structure.CopyTerraformFolderToTemp(t, examplePath, "")