Add API for updating and deactivating users

app/controllers/users_controller.rb

@@ -14,7 +14,10 @@ class UsersController < ApplicationController
 
   def update
     if @user.update(user_params)
-      redirect_to @user
+      respond_to do |format|
+        format.html { redirect_to @user }
+        format.json { head :no_content }
+      end
     else
       render :edit, status: :unprocessable_entity
     end
@@ -22,7 +25,11 @@ class UsersController < ApplicationController
 
   def destroy
     @user.deactivate
-    redirect_to users_path
+
+    respond_to do |format|
+      format.html { redirect_to users_path }
+      format.json { head :no_content }
+    end
   end
 
   private

test/controllers/users_controller_test.rb

@@ -102,4 +102,23 @@ class UsersControllerTest < ActionDispatch::IntegrationTest
     assert_response :success
     assert_equal users(:david).name, @response.parsed_body["name"]
   end
+
+  test "update as JSON" do
+    sign_in_as :kevin
+
+    put user_path(users(:david)), params: { user: { name: "New David" } }, as: :json
+
+    assert_response :no_content
+    assert_equal "New David", users(:david).reload.name
+  end
+
+  test "destroy as JSON" do
+    sign_in_as :kevin
+
+    assert_difference -> { User.active.count }, -1 do
+      delete user_path(users(:david)), as: :json
+    end
+
+    assert_response :no_content
+  end
 end