Add ComponentService.Get methods

component.go

@@ -1,6 +1,9 @@
 package jira
 
-import "context"
+import (
+	"context"
+	"fmt"
+)
 
 // ComponentService handles components for the Jira instance / API.//
 // Jira API docs: https://docs.atlassian.com/software/jira/docs/api/REST/7.10.1/#api/2/component
@@ -42,3 +45,26 @@ func (s *ComponentService) CreateWithContext(ctx context.Context, options *Creat
 func (s *ComponentService) Create(options *CreateComponentOptions) (*ProjectComponent, *Response, error) {
 	return s.CreateWithContext(context.Background(), options)
 }
+
+// GetWithContext returns a full representation of the JIRA component for the given component ID.
+// Jira API docs: https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-project-components/
+func (s *ComponentService) GetWithContext(ctx context.Context, componentID string) (*ProjectComponent, *Response, error) {
+	apiEndpoint := fmt.Sprintf("rest/api/2/component/%s", componentID)
+	req, err := s.client.NewRequestWithContext(ctx, "GET", apiEndpoint, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	component := new(ProjectComponent)
+	resp, err := s.client.Do(req, component)
+	if err != nil {
+		return nil, resp, NewJiraError(resp, err)
+	}
+
+	return component, resp, nil
+}
+
+// Get wraps GetWithContext using the background context.
+func (s *ComponentService) Get(componentID string) (*ProjectComponent, *Response, error) {
+	return s.GetWithContext(context.Background(), componentID)
+}

component_test.go

@@ -2,6 +2,7 @@ package jira
 
 import (
 	"fmt"
+	"io/ioutil"
 	"net/http"
 	"testing"
 )
@@ -27,3 +28,52 @@ func TestComponentService_Create_Success(t *testing.T) {
 		t.Errorf("Error given: %s", err)
 	}
 }
+
+func TestComponentService_Get(t *testing.T) {
+	setup()
+	defer teardown()
+	testAPIEdpoint := "/rest/api/2/component/42102"
+
+	raw, err := ioutil.ReadFile("./mocks/component.json")
+	if err != nil {
+		t.Error(err.Error())
+	}
+	testMux.HandleFunc(testAPIEdpoint, func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		testRequestURL(t, r, testAPIEdpoint)
+		fmt.Fprint(w, string(raw))
+	})
+
+	component, _, err := testClient.Component.Get("42102")
+	if err != nil {
+		t.Errorf("Error given: %s", err)
+	}
+	if component == nil {
+		t.Error("Expected component. Component is nil")
+		return
+	}
+}
+
+func TestComponentService_Get_NoComponent(t *testing.T) {
+	setup()
+	defer teardown()
+	testAPIEdpoint := "/rest/api/2/component/99999999"
+
+	testMux.HandleFunc(testAPIEdpoint, func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "GET")
+		testRequestURL(t, r, testAPIEdpoint)
+		fmt.Fprint(w, nil)
+	})
+
+	component, resp, err := testClient.Component.Get("99999999")
+	if component != nil {
+		t.Errorf("Expected nil. Got %+v", component)
+	}
+
+	if resp.Status == "404" {
+		t.Errorf("Expected status 404. Got %s", resp.Status)
+	}
+	if err == nil {
+		t.Errorf("Error given: %s", err)
+	}
+}

mocks/component.json

@@ -0,0 +1,50 @@
+{
+  "self": "https://issues.apache.org/jira/rest/api/2/component/42102",
+  "id": "42102",
+  "name": "Some Component",
+  "lead": {
+    "self": "https://issues.apache.org/jira/rest/api/2/[email protected]",
+    "key": "firstname.lastname",
+    "name": "[email protected]",
+    "avatarUrls": {
+      "48x48": "https://issues.apache.org/jira/secure/useravatar?ownerId=firstname.lastname&avatarId=31851",
+      "24x24": "https://issues.apache.org/jira/secure/useravatar?size=small&ownerId=firstname.lastname&avatarId=31851",
+      "16x16": "https://issues.apache.org/jira/secure/useravatar?size=xsmall&ownerId=firstname.lastname&avatarId=31851",
+      "32x32": "https://issues.apache.org/jira/secure/useravatar?size=medium&ownerId=firstname.lastname&avatarId=31851"
+    },
+    "displayName": "Firstname Lastname",
+    "active": true
+  },
+  "assigneeType": "COMPONENT_LEAD",
+  "assignee": {
+    "self": "https://issues.apache.org/jira/rest/api/2/[email protected]",
+    "key": "firstname.lastname",
+    "name": "[email protected]",
+    "avatarUrls": {
+      "48x48": "https://issues.apache.org/jira/secure/useravatar?ownerId=firstname.lastname&avatarId=31851",
+      "24x24": "https://issues.apache.org/jira/secure/useravatar?size=small&ownerId=firstname.lastname&avatarId=31851",
+      "16x16": "https://issues.apache.org/jira/secure/useravatar?size=xsmall&ownerId=firstname.lastname&avatarId=31851",
+      "32x32": "https://issues.apache.org/jira/secure/useravatar?size=medium&ownerId=firstname.lastname&avatarId=31851"
+    },
+    "displayName": "Firstname Lastname",
+    "active": true
+  },
+  "realAssigneeType": "COMPONENT_LEAD",
+  "realAssignee": {
+    "self": "https://issues.apache.org/jira/rest/api/2/[email protected]",
+    "key": "firstname.lastname",
+    "name": "[email protected]",
+    "avatarUrls": {
+      "48x48": "https://issues.apache.org/jira/secure/useravatar?ownerId=firstname.lastname&avatarId=31851",
+      "24x24": "https://issues.apache.org/jira/secure/useravatar?size=small&ownerId=firstname.lastname&avatarId=31851",
+      "16x16": "https://issues.apache.org/jira/secure/useravatar?size=xsmall&ownerId=firstname.lastname&avatarId=31851",
+      "32x32": "https://issues.apache.org/jira/secure/useravatar?size=medium&ownerId=firstname.lastname&avatarId=31851"
+    },
+    "displayName": "Firstname Lastname",
+    "active": true
+  },
+  "isAssigneeTypeValid": true,
+  "project": "ABC",
+  "projectId": 12345,
+  "archived": false
+}