Initial release

Set default HTTP headers in Rails integration tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ursm

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    tags: ['v*']
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    permissions:
+      id-token: write
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.4'
+
+      - uses: rubygems/release-gem@v1

.github/workflows/test.yml

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+name: Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ['3.3', '3.4']
+        rails: ['7.1', '7.2', '8.0']
+
+    env:
+      RAILS_VERSION: ${{ matrix.rails }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+
+      - run: bundle exec ruby test/minitest/default_http_header_test.rb

.gitignore

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+Gemfile.lock

Gemfile

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+source 'https://rubygems.org'
+
+gemspec
+
+if (rails_version = ENV['RAILS_VERSION'])
+  gem 'actionpack',    "~> #{rails_version}.0"
+  gem 'activesupport', "~> #{rails_version}.0"
+end

LICENSE.txt

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+Copyright (c) 2026 Keita Urashima
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Minitest::DefaultHttpHeader
+
+Set default HTTP headers in Rails integration tests.
+
+Minitest version of [rspec-default_http_header](https://github.com/kenchan/rspec-default_http_header).
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'minitest-default_http_header'
+```
+
+## Usage
+
+Use `default_headers` to set HTTP headers that are automatically included in every request:
+
+```ruby
+class UsersApiTest < ActionDispatch::IntegrationTest
+  setup do
+    user = create(:user)
+    default_headers['Authorization'] = user.token
+  end
+
+  test 'index' do
+    get '/api/users.json'
+    # Authorization header is sent automatically
+
+    assert_response :success
+  end
+end
+```
+
+Per-request headers are merged with default headers:
+
+```ruby
+class UsersApiTest < ActionDispatch::IntegrationTest
+  setup do
+    default_headers['Authorization'] = 'your-authorization-token'
+  end
+
+  test 'index as JSON' do
+    get '/api/users', headers: {'Accept' => 'application/json'}
+    # Both Authorization and Accept headers are sent
+
+    assert_response :success
+  end
+end
+```
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

lib/minitest-default_http_header.rb

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+require 'minitest/default_http_header'

lib/minitest/default_http_header.rb

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+require 'minitest/default_http_header/version'
+require 'active_support/concern'
+require 'active_support/lazy_load_hooks'
+
+module Minitest
+  module DefaultHttpHeader
+    extend ActiveSupport::Concern
+
+    HTTP_METHODS = %w(get post put patch delete).freeze
+
+    def default_headers
+      @default_headers ||= {}
+    end
+
+    HTTP_METHODS.each do |m|
+      define_method(m) do |path, *args, **kwargs|
+        kwargs[:headers] = default_headers.merge(kwargs[:headers] || {})
+
+        super(path, *args, **kwargs)
+      end
+    end
+  end
+end
+
+ActiveSupport.on_load(:action_dispatch_integration_test) do
+  include Minitest::DefaultHttpHeader
+end

lib/minitest/default_http_header/version.rb

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+module Minitest
+  module DefaultHttpHeader
+    VERSION = '0.1.0'
+  end
+end

minitest-default_http_header.gemspec

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+require_relative 'lib/minitest/default_http_header/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = 'minitest-default_http_header'
+  spec.version       = Minitest::DefaultHttpHeader::VERSION
+  spec.authors       = ['Keita Urashima']
+  spec.email         = ['ursm@ursm.jp']
+  spec.summary       = 'Set default HTTP headers in integration tests'
+  spec.homepage      = 'https://github.com/ursm/minitest-default_http_header'
+  spec.license       = 'MIT'
+
+  spec.required_ruby_version = '>= 3.3'
+
+  spec.files         = Dir['lib/**/*.rb', 'LICENSE.txt', 'README.md']
+  spec.require_paths = ['lib']
+
+  spec.add_dependency 'actionpack', '>= 7.1'
+  spec.add_dependency 'activesupport', '>= 7.1'
+end