Add error check

Thrown an error if no key is given when secret has mutliple values

template/interpolate/aws/secretsmanager/secretsmanager.go

@@ -83,7 +83,11 @@ func getSecretValue(s *SecretString, spec *SecretSpec) (string, error) {
 		return "", err
 	}
 
-	// If key is not set then return first value stored in secret
+	// If key is not set and secret has multiple keys, return error
+	if spec.Key == "" && len(secretValue) > 1 {
+		return "", errors.New("Secret has multiple values and no key was set")
+	}
+
 	if spec.Key == "" {
 		for _, v := range secretValue {
 			return v, nil

template/interpolate/aws/secretsmanager/secretsmanager_test.go

@@ -20,13 +20,15 @@ func (m mockedSecret) GetSecretValue(in *secretsmanager.GetSecretValueInput) (*s
 
 func TestGetSecret(t *testing.T) {
 	testCases := []struct {
-		arg  *SecretSpec
-		mock secretsmanager.GetSecretValueOutput
-		want string
-		ok   bool
+		description string
+		arg         *SecretSpec
+		mock        secretsmanager.GetSecretValueOutput
+		want        string
+		ok          bool
 	}{
 		{
-			arg: &SecretSpec{Name: "test/secret"},
+			description: "input has valid secret name, secret has single key",
+			arg:         &SecretSpec{Name: "test/secret"},
 			mock: secretsmanager.GetSecretValueOutput{
 				Name:         aws.String("test/secret"),
 				SecretString: aws.String(`{"key": "test"}`),
@@ -35,6 +37,7 @@ func TestGetSecret(t *testing.T) {
 			ok:   true,
 		},
 		{
+			description: "input has valid secret name and key, secret has single key",
 			arg: &SecretSpec{
 				Name: "test/secret",
 				Key:  "key",
@@ -47,6 +50,7 @@ func TestGetSecret(t *testing.T) {
 			ok:   true,
 		},
 		{
+			description: "input has valid secret name and key, secret has multiple keys",
 			arg: &SecretSpec{
 				Name: "test/secret",
 				Key:  "second_key",
@@ -59,6 +63,7 @@ func TestGetSecret(t *testing.T) {
 			ok:   true,
 		},
 		{
+			description: "input has valid secret name and no key, secret has multiple keys",
 			arg: &SecretSpec{
 				Name: "test/secret",
 			},
@@ -66,10 +71,10 @@ func TestGetSecret(t *testing.T) {
 				Name:         aws.String("test/secret"),
 				SecretString: aws.String(`{"first_key": "first_val", "second_key": "second_val"}`),
 			},
-			want: "first_val",
-			ok:   true,
+			ok: false,
 		},
 		{
+			description: "input has valid secret name and invalid key, secret has single key",
 			arg: &SecretSpec{
 				Name: "test/secret",
 				Key:  "nonexistent",
@@ -81,6 +86,7 @@ func TestGetSecret(t *testing.T) {
 			ok: false,
 		},
 		{
+			description: "input has valid secret name and invalid key, secret has multiple keys",
 			arg: &SecretSpec{
 				Name: "test/secret",
 				Key:  "nonexistent",
@@ -92,6 +98,7 @@ func TestGetSecret(t *testing.T) {
 			ok: false,
 		},
 		{
+			description: "input has secret and key, secret is empty",
 			arg: &SecretSpec{
 				Name: "test/secret",
 				Key:  "nonexistent",