{"id":12567,"date":"2025-06-16T04:51:28","date_gmt":"2025-06-16T04:51:28","guid":{"rendered":"https:\/\/www.bacancytechnology.com\/qanda\/?p=12567"},"modified":"2025-06-16T04:51:28","modified_gmt":"2025-06-16T04:51:28","slug":"test-controller-with-sign-in-user-on-rails-8-authentication","status":"publish","type":"post","link":"https:\/\/www.bacancytechnology.com\/qanda\/ruby-on-rails\/test-controller-with-sign-in-user-on-rails-8-authentication","title":{"rendered":"How to Test Controller with Sign in User on Rails 8 Authentication"},"content":{"rendered":"

Rails 8 ships with built-in authentication,<\/strong> which simplifies login flows without requiring third-party gems like Devise. But with any new convention, there’s a learning curve\u2014especially when writing tests.<\/p>\n

If you’re writing controller tests with Minitest <\/strong>and running into issues after enabling authentication, you’re not alone. Here\u2019s what you might see:<\/p>\n

Problem: Unexpected Redirect to Login<\/h2>\n

You might get a test failure like this:<\/p>\n

bash<\/code>
\nCopyEdit<\/strong><\/p>\n

\r\nFailure:\r\nTicketsControllerTest#test_should_get_index:\r\nExpected response to be a <2XX: success>, but was a <302: Found> redirect to <http:\/\/www.example.com\/session\/new>\r\n<\/pre>\n
The Mistake<\/h2>\n
A common pitfall is using the wrong route for signing in<\/strong>. In Rails 8’s built-in auth, the route for signing in is:<\/p>\n
sh<\/code>
\nCopyEdit<\/strong>
\nPOST \/session<\/code>
\nBut many developers mistakenly use new_session_url, which is a GET request for the login form<\/strong>, not the login action<\/strong>.<\/p>\n
The Fix: Use the Correct Route and Parameters<\/h2>\n
Update your test helper or controller test to use the proper login route like this:<\/p>\n
ruby<\/code>
\nCopyEdit<\/strong><\/p>\n
\r\ndef sign_in(user)\r\n  post session_url, params: { email_address: user.email_address, password: \"password\" }\r\nend\r\n<\/pre>\n
Make sure this sign_in method is called before making authenticated requests in your tests.<\/p>\n
Example Controller Test (Minitest)<\/h3>\n
ruby<\/code>
\nCopyEdit<\/strong><\/p>\n
\r\nrequire \"test_helper\"\r\nclass TicketsControllerTest < ActionDispatch::IntegrationTest\r\n  setup do\r\n    @user = users(:one)\r\n    sign_in(@user)\r\n  end\r\n\r\n  test \"should get index\" do\r\n    get tickets_url\r\n    assert_response :success\r\n  end\r\n  private\r\n  def sign_in(user)\r\n    post session_url, params: {\r\n      email_address: user.email_address,\r\n      password: \"password\"\r\n    }\r\n  end\r\nend\r\n<\/pre>\n
\"Also
<\/p>
Also Read:<\/h3>Design Patterns in Rails<\/a><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"
Rails 8 ships with built-in authentication, which simplifies login flows without requiring third-party gems like Devise. But with any new convention, there’s a learning curve\u2014especially when writing tests. If you’re writing controller tests with Minitest and running into issues after enabling authentication, you’re not alone. Here\u2019s what you might see: Problem: Unexpected Redirect to Login […]<\/p>\n","protected":false},"author":1,"featured_media":12568,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-12567","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ruby-on-rails"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/posts\/12567"}],"collection":[{"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/comments?post=12567"}],"version-history":[{"count":1,"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/posts\/12567\/revisions"}],"predecessor-version":[{"id":12569,"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/posts\/12567\/revisions\/12569"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/media\/12568"}],"wp:attachment":[{"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/media?parent=12567"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/categories?post=12567"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/qanda\/wp-json\/wp\/v2\/tags?post=12567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}