Adds destroy def to activity controller, and unit tests

app/controllers/api/v1/activities_controller.rb

 class Api::V1::ActivitiesController < ApplicationController
   before_action :set_activity, only: %i[show update destroy]
   before_action :check_login
-  before_action :check_owner, only: %i[update]
+  before_action :check_owner, only: %i[update destroy]
 
   def index
     render json: Activity.all
     end
   end
 
+  def destroy
+    @activity.destroy
+    head 204
+  end
+
   private
 
   # Only allow a trusted parameter "white list" through.

test/controllers/api/v1/activities_controller_test.rb

     assert_response :success
   end
 
-  test "should forbid update activity - not connected" do
+  test "should forbid update activity - not logged in" do
     patch api_v1_activity_url(@activity),
     params: { activity: { name: "Updated name" } },
     as: :json
     assert_response :forbidden
   end
 
-  test "should forbid update activity - not owner" do
+  test "should forbid update activity - not owner or admin" do
     patch api_v1_activity_url(@activity),
     params: { activity: { name: "Updated name" } },
     headers: { Authorization: JsonWebToken.encode(user_id: users(:two).id) },
     as: :json
     assert_response :forbidden
   end
+
+  #DESTROY
+  test "should destroy activity" do
+    assert_difference "Activity.count", -1 do
+    delete api_v1_activity_url(@activity),
+    headers: { Authorization: JsonWebToken.encode(user_id: @activity.author_id) },
+    as: :json
+    end
+    assert_response :no_content
+  end
+
+  test "should forbid destroy activity - not logged in" do
+    assert_no_difference('Activity.count') do
+      delete api_v1_activity_url(@activity), as: :json
+    end
+    assert_response :forbidden
+  end
+
+  test "should forbid destroy activity - not owner or admin" do
+    assert_no_difference('Activity.count') do
+    delete api_v1_activity_url(@activity),
+    headers: { Authorization: JsonWebToken.encode(user_id: users(:two).id) },
+    as: :json
+    end
+    assert_response :forbidden
+  end
 end