Add index and show defs to activities controller and test units

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
+  
+  def index
+    render json: Activity.all
+  end
+
+  def show
+    render json: Activity.find(params[:id])
+  end
+
+  private
+
+  # Only allow a trusted parameter "white list" through.
+  def activity_params
+    params.require(:user).permit(:name, :author_id, :description, :client)
+  end
+
+  def set_activity
+    @activity = Activity.find(params[:id])
+  end
+end

config/routes.rb

     namespace :v1 do
       resources :users
       resources :tokens, only: %i[create]
+      resources :activities
     end
   end
 end

test/controllers/api/v1/activities_controller_test.rb

+require "test_helper"
+
+class Api::V1::ActivitiesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    @activity = activities(:one)
+  end
+  
+  #INDEX
+  test "should access index" do
+    get api_v1_activities_url,
+    headers: { Authorization: JsonWebToken.encode(user_id: @activity.author_id) },
+    as: :json
+    assert_response :success
+  end
+
+  test "should not access index" do
+    get api_v1_activities_url, as: :json
+    assert_response :forbidden
+  end
+
+  #SHOW
+  test "should access show" do
+    get api_v1_activity_url(@activity),
+    headers: { Authorization: JsonWebToken.encode(user_id: @activity.author_id) },
+    as: :json
+    assert_response :success
+  end
+
+  test "should not access show" do
+    get api_v1_activity_url(@activity),
+    as: :json
+    assert_response :forbidden
+  end
+end