feat: Implement issue link type PUT

Author: johanmeiring

issuelinktype.go

@@ -78,3 +78,20 @@ func (s *IssueLinkTypeService) Create(linkType *IssueLinkType) (*IssueLinkType,
 	}
 	return linkType, resp, nil
 }
+
+// Update updates an issue link type.  The issue is found by key.
+//
+// JIRA API docs: https://developer.atlassian.com/cloud/jira/platform/rest/v2/#api-rest-api-2-issueLinkType-issueLinkTypeId-put
+func (s *IssueLinkTypeService) Update(linkType *IssueLinkType) (*IssueLinkType, *Response, error) {
+	apiEndpoint := fmt.Sprintf("rest/api/2/issueLinkType/%s", linkType.ID)
+	req, err := s.client.NewRequest("PUT", apiEndpoint, linkType)
+	if err != nil {
+		return nil, nil, err
+	}
+	resp, err := s.client.Do(req, nil)
+	if err != nil {
+		return nil, resp, NewJiraError(resp, err)
+	}
+	ret := *linkType
+	return &ret, resp, nil
+}

issuelinktype_test.go

@@ -73,3 +73,27 @@ func TestIssueLinkTypeService_Create(t *testing.T) {
 		t.Error("Expected linkType. LinkType is nil")
 	}
 }
+
+func TestIssueLinkTypeService_Update(t *testing.T) {
+	setup()
+	defer teardown()
+	testMux.HandleFunc("/rest/api/2/issueLinkType/100", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "PUT")
+		testRequestURL(t, r, "/rest/api/2/issueLinkType/100")
+
+		w.WriteHeader(http.StatusNoContent)
+	})
+
+	lt := &IssueLinkType{
+		ID:      "100",
+		Name:    "Problem/Incident",
+		Inward:  "is caused by",
+		Outward: "causes",
+	}
+
+	if linkType, _, err := testClient.IssueLinkType.Update(lt); err != nil {
+		t.Errorf("Error given: %s", err)
+	} else if linkType == nil {
+		t.Error("Expected linkType. LinkType is nil")
+	}
+}