added vendor files

backend/vendor/github.com/smartystreets/assertions/equal_method.go

@@ -0,0 +1,75 @@
+package assertions
+
+import "reflect"
+
+type equalityMethodSpecification struct {
+	a interface{}
+	b interface{}
+
+	aType reflect.Type
+	bType reflect.Type
+
+	equalMethod reflect.Value
+}
+
+func newEqualityMethodSpecification(a, b interface{}) *equalityMethodSpecification {
+	return &equalityMethodSpecification{
+		a: a,
+		b: b,
+	}
+}
+
+func (this *equalityMethodSpecification) IsSatisfied() bool {
+	if !this.bothAreSameType() {
+		return false
+	}
+	if !this.typeHasEqualMethod() {
+		return false
+	}
+	if !this.equalMethodReceivesSameTypeForComparison() {
+		return false
+	}
+	if !this.equalMethodReturnsBool() {
+		return false
+	}
+	return true
+}
+
+func (this *equalityMethodSpecification) bothAreSameType() bool {
+	this.aType = reflect.TypeOf(this.a)
+	if this.aType == nil {
+		return false
+	}
+	if this.aType.Kind() == reflect.Ptr {
+		this.aType = this.aType.Elem()
+	}
+	this.bType = reflect.TypeOf(this.b)
+	return this.aType == this.bType
+}
+func (this *equalityMethodSpecification) typeHasEqualMethod() bool {
+	aInstance := reflect.ValueOf(this.a)
+	this.equalMethod = aInstance.MethodByName("Equal")
+	return this.equalMethod != reflect.Value{}
+}
+
+func (this *equalityMethodSpecification) equalMethodReceivesSameTypeForComparison() bool {
+	signature := this.equalMethod.Type()
+	return signature.NumIn() == 1 && signature.In(0) == this.aType
+}
+
+func (this *equalityMethodSpecification) equalMethodReturnsBool() bool {
+	signature := this.equalMethod.Type()
+	return signature.NumOut() == 1 && signature.Out(0) == reflect.TypeOf(true)
+}
+
+func (this *equalityMethodSpecification) AreEqual() bool {
+	a := reflect.ValueOf(this.a)
+	b := reflect.ValueOf(this.b)
+	return areEqual(a, b) && areEqual(b, a)
+}
+func areEqual(receiver reflect.Value, argument reflect.Value) bool {
+	equalMethod := receiver.MethodByName("Equal")
+	argumentList := []reflect.Value{argument}
+	result := equalMethod.Call(argumentList)
+	return result[0].Bool()
+}