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Testing Tag Management Controller Integration in Maybe Finance

This test suite validates the TagsController functionality in a Ruby on Rails application using Minitest. It covers essential CRUD operations for tag management, including listing, creating, editing, and updating tags within a family-based user context.

Test Coverage Overview

The test suite provides comprehensive coverage of the TagsController endpoints and actions.

Index action verification with DOM element checking
New tag form accessibility testing
Tag creation with count assertion
Edit form accessibility validation
Tag update functionality verification

Implementation Analysis

The implementation follows Rails integration testing patterns using ActionDispatch::IntegrationTest. The suite employs user authentication setup and family-scoped tag management, utilizing fixtures for test data. DOM testing is implemented through assert_select helpers.

Technical Details

Testing Framework: Minitest
Integration Layer: ActionDispatch
Authentication: Custom sign_in helper
Fixtures: User and tag data
DOM Testing: Rails assert_select
Flash Message Validation

Best Practices Demonstrated

The test suite demonstrates several testing best practices for Rails applications.

Proper test setup with authentication
Atomic test cases for each controller action
Assertion of both response codes and side effects
Flash message verification
DOM element presence validation
Database count assertions for mutations

maybe-finance/maybe

test/controllers/tags_controller_test.rb

            
require "test_helper"

class TagsControllerTest < ActionDispatch::IntegrationTest
  setup do
    sign_in @user = users(:family_admin)
  end

  test "should get index" do
    get tags_url
    assert_response :success

    @user.family.tags.each do |tag|
      assert_select "#" + dom_id(tag), count: 1
    end
  end

  test "should get new" do
    get new_tag_url
    assert_response :success
  end

  test "should create tag" do
    assert_difference("Tag.count") do
      post tags_url, params: { tag: { name: "Test Tag" } }
    end

    assert_redirected_to tags_url
    assert_equal "Tag created", flash[:notice]
  end

  test "should get edit" do
    get edit_tag_url(tags.first)
    assert_response :success
  end

  test "should update tag" do
    patch tag_url(tags.first), params: { tag: { name: "Test Tag" } }

    assert_redirected_to tags_url
    assert_equal "Tag updated", flash[:notice]
  end
end