Fix failed when resource has generateName only

acceptance.bats

@@ -48,6 +48,12 @@
   [ "$output" = "PASS - fixtures/null_string.yaml contains a valid Service (frontend)" ]
 }
 
+@test "Pass when parsing a valid Kubernetes config YAML file with generate name" {
+  run bin/kubeval fixtures/generate_name.yaml
+  [ "$status" -eq 0 ]
+  [ "$output" = "PASS - fixtures/generate_name.yaml contains a valid Job (pi-{{ generateName }})" ]
+}
+
 @test "Pass when parsing a multi-document config file" {
   run bin/kubeval fixtures/multi_valid.yaml
   [ "$status" -eq 0 ]

fixtures/generate_name.yaml

@@ -0,0 +1,13 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  generateName: pi-
+spec:
+  template:
+    spec:
+      containers:
+      - name: pi
+        image: perl
+        command: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]
+      restartPolicy: Never
+  backoffLimit: 4

kubeval/kubeval.go

@@ -122,17 +122,19 @@ func validateResource(data []byte, schemaCache map[string]*gojsonschema.Schema,
 		return result, body, nil
 	}
 
-	name, err := getStringAt(body, []string{"metadata", "name"})
-	if err != nil {
-		return result, body, fmt.Errorf("%s: %s", result.FileName, err.Error())
-	}
-	result.ResourceName = name
-
-	namespace, err := getStringAt(body, []string{"metadata", "namespace"})
-	if err != nil {
-		result.ResourceNamespace = "default"
+	metadata, _ := getObject(body, "metadata")
+	if metadata != nil {
+		namespace, _ := getString(metadata, "namespace")
+		name, _ := getString(metadata, "name")
+		generateName, _ := getString(metadata, "generateName")
+
+		if len(name) == 0 && len(generateName) > 0 {
+			result.ResourceName = fmt.Sprintf("%s{{ generateName }}", generateName)
+		} else {
+			result.ResourceName = name
+		}
+		result.ResourceNamespace = namespace
 	}
-	result.ResourceNamespace = namespace
 
 	kind, err := getString(body, "kind")
 	if err != nil {

kubeval/kubeval_test.go

@@ -27,6 +27,7 @@ func TestValidateValidInputs(t *testing.T) {
 		"comment.yaml",
 		"valid.yaml",
 		"valid.json",
+		"generate_name.yaml",
 		"multi_valid.yaml",
 		"int_or_string.yaml",
 		"null_array.yaml",
@@ -60,6 +61,7 @@ func TestValidateValidInputsWithCache(t *testing.T) {
 		"comment.yaml",
 		"valid.yaml",
 		"valid.json",
+		"generate_name.yaml",
 		"multi_valid.yaml",
 		"int_or_string.yaml",
 		"null_array.yaml",