add test for missing apiVersion - better error message

acceptance.bats

@@ -85,13 +85,19 @@
 @test "Fail when parsing a config that is missing a Kind" {
    run bin/kubeconform -summary fixtures/missing_kind.yaml
    [ "$status" -eq 1 ]
-   [[ "$output" == *"resource missing a Kind"* ]]
+   [[ "$output" == *"missing 'kind' key"* ]]
+}
+
+@test "Fail when parsing a config that is missing an apiVersion" {
+   run bin/kubeconform -summary fixtures/missing_apiversion.yaml
+   [ "$status" -eq 1 ]
+   [[ "$output" == *"missing 'apiVersion' key"* ]]
 }
 
 @test "Fail when parsing a config that is missing a Kind value" {
    run bin/kubeconform -summary fixtures/missing_kind_value.yaml
    [ "$status" -eq 1 ]
-   [[ "$output" == *"resource missing a Kind"* ]]
+   [[ "$output" == *"missing 'kind' key"* ]]
 }
 
 @test "Fail when parsing a config with CRD" {

fixtures/missing_apiversion.yaml

@@ -0,0 +1,18 @@
+kind: ReplicationController
+metadata:
+  name: "bob"
+spec:
+  replicas: 2
+  selector:
+    app: nginx
+  template:
+    metadata:
+      name: nginx
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx
+        ports:
+        - containerPort: 80

pkg/resource/resource.go

@@ -1,6 +1,8 @@
 package resource
 
 import (
+	"fmt"
+
 	"sigs.k8s.io/yaml"
 )
 
@@ -40,6 +42,19 @@ func (res *Resource) Signature() (*Signature, error) {
 
 	// We cache the result to not unmarshall every time we want to access the signature
 	res.sig = &Signature{Kind: resource.Kind, Version: resource.APIVersion, Namespace: resource.Metadata.Namespace, Name: name}
+
+	if err != nil { // Exit if there was an error unmarshalling
+		return res.sig, err
+	}
+
+	if resource.Kind == "" {
+		return res.sig, fmt.Errorf("missing 'kind' key")
+	}
+
+	if resource.APIVersion == "" {
+		return res.sig, fmt.Errorf("missing 'apiVersion' key")
+	}
+
 	return res.sig, err
 }
 
@@ -48,8 +63,15 @@ func (res *Resource) SignatureFromMap(m map[string]interface{}) (*Signature, err
 		return res.sig, nil
 	}
 
-	APIVersion, _ := m["apiVersion"].(string)
-	Kind, _ := m["kind"].(string)
+	Kind, ok := m["kind"].(string)
+	if !ok {
+		return res.sig, fmt.Errorf("missing 'kind' key")
+	}
+
+	APIVersion, ok := m["apiVersion"].(string)
+	if !ok {
+		return res.sig, fmt.Errorf("missing 'apiVersion' key")
+	}
 
 	var name, ns string
 	Metadata, ok := m["metadata"].(map[string]interface{})

pkg/validator/validator.go

@@ -123,10 +123,6 @@ func (val *v) ValidateResource(res resource.Resource) Result {
 		return Result{Resource: res, Err: fmt.Errorf("error while parsing: %s", err), Status: Error}
 	}
 
-	if sig.Kind == "" { // Resource contains key/values but no Kind
-		return Result{Resource: res, Err: fmt.Errorf("resource missing a Kind"), Status: Error}
-	}
-
 	if skip(*sig) {
 		return Result{Resource: res, Err: nil, Status: Skipped}
 	}

pkg/validator/validator_test.go

@@ -19,6 +19,7 @@ func TestValidate(t *testing.T) {
 			"valid resource",
 			[]byte(`
 kind: name
+apiVersion: v1
 firstName: foo
 lastName: bar
 `),
@@ -49,6 +50,7 @@ lastName: bar
 			"invalid resource",
 			[]byte(`
 kind: name
+apiVersion: v1
 firstName: foo
 lastName: bar
 `),
@@ -79,6 +81,7 @@ lastName: bar
 			"missing required field",
 			[]byte(`
 kind: name
+apiVersion: v1
 firstName: foo
 `),
 			[]byte(`{
@@ -108,6 +111,7 @@ firstName: foo
 			"resource has invalid yaml",
 			[]byte(`
 kind: name
+apiVersion: v1
 firstName foo
 lastName: bar
 `),
@@ -118,6 +122,9 @@ lastName: bar
     "kind": {
       "type": "string"
     },
+    "apiVersion": {
+      "type": "string"
+    },
     "firstName": {
       "type": "number"
     },