Merge pull request go-gremlin#8 from cbinsights/113/Vertex-compare-me…

…thod

Compare vertexes

types.go

@@ -19,17 +19,44 @@ type Vertex struct {
 	Value VertexValue `json:"@value"`
 }
 
+func (v1 Vertex) Equals(v2 Vertex) bool {
+	return v1.Type == v2.Type && v1.Value.Equals(v2.Value)
+}
+
 type VertexValue struct {
 	ID         string                      `json:"id"`
 	Label      string                      `json:"label"`
 	Properties map[string][]VertexProperty `json:"properties"`
 }
 
+func (v1 VertexValue) Equals(v2 VertexValue) bool {
+	if v1.ID != v2.ID || v1.Label != v2.Label || len(v1.Properties) != len(v2.Properties) {
+		return false
+	}
+	for k, val1Slice := range v1.Properties {
+		val2Slice, ok := v2.Properties[k]
+		if !ok || len(val1Slice) != len(val2Slice) {
+			return false
+		}
+		for i, val1 := range val1Slice {
+			val2 := val2Slice[i]
+			if !val1.Equals(val2) {
+				return false
+			}
+		}
+	}
+	return true
+}
+
 type VertexProperty struct {
 	Type  string              `json:"@type"`
 	Value VertexPropertyValue `json:"@value"`
 }
 
+func (v1 VertexProperty) Equals(v2 VertexProperty) bool {
+	return v1.Type == v2.Type && v1.Value.Equals(v2.Value)
+}
+
 type EdgeProperty struct {
 	Type  string            `json:"@type"`
 	Value EdgePropertyValue `json:"@value"`
@@ -41,6 +68,10 @@ type VertexPropertyValue struct {
 	Value interface{}  `json:"value"`
 }
 
+func (v1 VertexPropertyValue) Equals(v2 VertexPropertyValue) bool {
+	return v1.ID.Equals(v2.ID) && v1.Label == v2.Label && InterfacesMatch(v1.Value, v2.Value)
+}
+
 type EdgePropertyValue struct {
 	Label string      `json:"key"`
 	Value interface{} `json:"value"`
@@ -53,6 +84,10 @@ type GenericValue struct {
 	Value interface{} `json:"@value"`
 }
 
+func (g1 GenericValue) Equals(g2 GenericValue) bool {
+	return g1.Type == g2.Type && InterfacesMatch(g1.Value, g2.Value)
+}
+
 type Edges []Edge
 
 type Edge struct {