Initial cloud-services repo - gateway service + pkg modules

pkg/testhelper/json_compare.go

@@ -0,0 +1,78 @@
+package testhelper
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type JSONComparer struct {
+	result      map[string]interface{}
+	IgnoreProps []string
+}
+
+func (j *JSONComparer) Close() {
+	j.result = nil
+	j.IgnoreProps = nil
+}
+
+func (j *JSONComparer) GetDiff(reference []byte, compare []byte) (map[string]interface{}, error) {
+	j.result = map[string]interface{}{}
+	objRef := map[string]interface{}{}
+	objComp := map[string]interface{}{}
+
+	err := json.Unmarshal(reference, &objRef)
+	if err != nil {
+		return j.result, err
+	}
+
+	err = json.Unmarshal(compare, &objComp)
+	if err != nil {
+		return j.result, err
+	}
+
+	j.compare("", objRef, objComp)
+
+	return j.result, nil
+}
+
+func (j *JSONComparer) isMap(obj interface{}) (converted map[string]interface{}, isMap bool) {
+	converted, isMap = obj.(map[string]interface{})
+	return
+}
+
+func (j *JSONComparer) isIgnored(key string) bool {
+	for _, ignored := range j.IgnoreProps {
+		if ignored == key {
+			return true
+		}
+	}
+	return false
+}
+
+func (j JSONComparer) processMap(key string, refVal interface{}, compVal interface{}) bool {
+	if convRef, isRefMap := j.isMap(refVal); isRefMap {
+		if convCom, isComMap := j.isMap(compVal); isComMap {
+			j.compare(fmt.Sprintf("%s.", key), convRef, convCom)
+			return true
+		}
+	}
+	return false
+}
+
+func (j *JSONComparer) compare(prefix string, reference map[string]interface{}, compare map[string]interface{}) {
+	for key, refVal := range reference {
+		if j.isIgnored(key) {
+			continue
+		}
+		if comVal, ok := compare[key]; !ok {
+			j.result[key] = "missing"
+		} else {
+			if j.processMap(key, refVal, comVal) {
+				continue
+			}
+			if comVal != refVal {
+				j.result[prefix+key] = refVal
+			}
+		}
+	}
+}