Merge pull request #283 from instrumenta/issue-246

fix: do not fail on empty lists

Author: carlossg

fixtures/list_empty_valid.yaml

@@ -0,0 +1,4 @@
+---
+apiVersion: v1
+kind: List
+items: []

kubeval/kubeval.go

@@ -284,7 +284,7 @@ func ValidateWithCache(input []byte, schemaCache map[string]*gojsonschema.Schema
 	}{}
 
 	unmarshalErr := yaml.Unmarshal(input, &list)
-	isYamlList := unmarshalErr == nil && list.Items != nil && len(list.Items) > 0
+	isYamlList := unmarshalErr == nil && list.Items != nil
 
 	var bits [][]byte
 	if isYamlList {

kubeval/kubeval_test.go

@@ -36,6 +36,7 @@ func TestValidateValidInputs(t *testing.T) {
 		"full_domain_group.yaml",
 		"unconventional_keys.yaml",
 		"list_valid.yaml",
+		"list_empty_valid.yaml",
 		"same-object-different-namespace.yaml",
 		"same-object-different-namespace-default.yaml",
 		"duplicates-skipped-kinds.yaml",