Add def update and unit tests

test/controllers/api/v1/tasks_controller_test.rb

@@ -51,7 +51,7 @@ class Api::V1::TasksControllerTest < ActionDispatch::IntegrationTest
     assert_response :created
   end
 
-  test "should forbid create task" do
+  test "should not create task" do
     assert_no_difference("Task.count") do
       post api_v1_activity_tasks_url(@activity),
       params: { task: { name: @task.name, description: @task.description, user_id: @user, activity_id: @activity } },
@@ -59,4 +59,20 @@ class Api::V1::TasksControllerTest < ActionDispatch::IntegrationTest
     end
     assert_response :forbidden
   end
+
+  # UPDATE
+  test "should update task" do
+    patch api_v1_activity_task_url(@activity, @task),
+    params: { task: { name: "New name", description: "New description" } },
+    headers: { Authorization: JsonWebToken.encode(user_id: @user.id) },
+    as: :json
+    assert_response :success
+  end
+
+  test "should not update task" do
+    patch api_v1_activity_task_url(@activity, @task),
+    params: { task: { name: "New name", description: "New description" } },
+    as: :json
+    assert_response :forbidden
+  end
 end