Add get task/id (#30)

Closes #22

Reviewed-on: #30

backend/api_test.go

@@ -313,15 +313,17 @@ func TestGetTaskWhenNoTasks(t *testing.T) {
 	result.Length().IsEqual(0)
 }
 
-func TestGetTaskWhenTasks(t *testing.T) {
-	e := startServer(t)
-
-	// Create a new task
+func createTestTask(e *httpexpect.Expect) {
 	requestBody := map[string]interface{}{
 		"name":   "Test Task",
 		"reward": 100,
 	}
 	e.POST("/tasks").WithJSON(requestBody).Expect().Status(201)
+}
+
+func TestGetTaskSWhenTasks(t *testing.T) {
+	e := startServer(t)
+	createTestTask(e)
 
 	// Get the task
 	result := e.GET("/tasks").Expect().Status(200).JSON().Array()
@@ -332,3 +334,20 @@ func TestGetTaskWhenTasks(t *testing.T) {
 	item.Value("reward").IsEqual(100)
 	item.Value("assigned").IsNull()
 }
+
+func TestGetTask(t *testing.T) {
+	e := startServer(t)
+	createTestTask(e)
+
+	result := e.GET("/task/1").Expect().Status(200).JSON().Object()
+	result.Value("id").IsEqual(1)
+	result.Value("name").IsEqual("Test Task")
+	result.Value("reward").IsEqual(100)
+	result.Value("assigned").IsNull()
+}
+
+func TestGetTaskInvalidId(t *testing.T) {
+	e := startServer(t)
+	createTestTask(e)
+	e.GET("/task/2").Expect().Status(404)
+}