Validate json content before parsing (#70)

CHANGELOG.md

@@ -7,9 +7,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-
 ### Changed
 
+### Added
+
+## [0.8.3] - 2023-03-20
+
+### Added
+
+- Validates json content before parsing.
+
 ## [0.8.2] - 2023-03-01
 
 ### Added

json_parse_node.go

@@ -27,6 +27,9 @@ func NewJsonParseNode(content []byte) (*JsonParseNode, error) {
 	if len(content) == 0 {
 		return nil, errors.New("content is empty")
 	}
+	if !json.Valid(content) {
+		return nil, errors.New("invalid json type")
+	}
 	decoder := json.NewDecoder(bytes.NewReader(content))
 	value, err := loadJsonTree(decoder)
 	return value, err

json_parse_node_factory_test.go

@@ -12,3 +12,12 @@ func TestJsonParseNodeFactoryHonoursInterface(t *testing.T) {
 	instance := NewJsonParseNodeFactory()
 	assert.Implements(t, (*absser.ParseNodeFactory)(nil), instance)
 }
+
+func TestInvalidContentShouldFail(t *testing.T) {
+	source := "3 [ }"
+	sourceArray := []byte(source)
+
+	parseNode, err := NewJsonParseNode(sourceArray)
+	assert.Error(t, err)
+	assert.Nil(t, parseNode)
+}