[#97] object: Refactor Patch related structs

* Add getters and setters for related types;
* Fix unit-tests.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

object/types.go

@@ -356,17 +356,17 @@ type PatchRequestBodyPatch struct {
 }
 
 type PatchRequestBody struct {
-	Address *refs.Address
+	address *refs.Address
 
-	NewAttributes []Attribute
+	newAttributes []Attribute
 
-	ReplaceAttributes bool
+	replaceAttributes bool
 
-	Patch *PatchRequestBodyPatch
+	patch *PatchRequestBodyPatch
 }
 
 type PatchRequest struct {
-	Body *PatchRequestBody
+	body *PatchRequestBody
 
 	session.RequestHeaders
 }
@@ -1543,6 +1543,78 @@ func (r *PutSingleResponse) SetBody(v *PutSingleResponseBody) {
 	r.body = v
 }
 
+func (r *PatchRequest) GetBody() *PatchRequestBody {
+	if r != nil {
+		return r.body
+	}
+
+	return nil
+}
+
+func (r *PatchRequest) SetBody(v *PatchRequestBody) {
+	r.body = v
+}
+
+func (r *PatchRequestBody) GetAddress() *refs.Address {
+	if r != nil {
+		return r.address
+	}
+
+	return nil
+}
+
+func (r *PatchRequestBody) SetAddress(addr *refs.Address) {
+	r.address = addr
+}
+
+func (r *PatchRequestBody) GetNewAttributes() []Attribute {
+	if r != nil {
+		return r.newAttributes
+	}
+
+	return nil
+}
+
+func (r *PatchRequestBody) SetNewAttributes(attrs []Attribute) {
+	r.newAttributes = attrs
+}
+
+func (r *PatchRequestBody) GetReplaceAttributes() bool {
+	if r != nil {
+		return r.replaceAttributes
+	}
+
+	return false
+}
+
+func (r *PatchRequestBody) SetReplaceAttributes(replace bool) {
+	r.replaceAttributes = replace
+}
+
+func (r *PatchRequestBody) GetPatch() *PatchRequestBodyPatch {
+	if r != nil {
+		return r.patch
+	}
+
+	return nil
+}
+
+func (r *PatchRequestBody) SetPatch(patch *PatchRequestBodyPatch) {
+	r.patch = patch
+}
+
+func (r *PatchResponse) GetBody() *PatchResponseBody {
+	if r != nil {
+		return r.Body
+	}
+
+	return nil
+}
+
+func (r *PatchResponse) SetBody(v *PatchResponseBody) {
+	r.Body = v
+}
+
 func (s *ECInfo) getObjectPart() {}
 
 func (s *ECInfo) getHeaderPart() {}