test: cover test_dispatch_emits_process_action_event_with_status

test/test_application_mount.rb

@@ -0,0 +1,52 @@
+require 'minitest/autorun'
+require 'prism'
+require 'support'
+
+class EchoMountedApp
+  def call(env)
+    [200, { 'Content-Type' => 'text/plain' },
+     ["script_name=#{env['SCRIPT_NAME']} path_info=#{env['PATH_INFO']}"]]
+  end
+end
+
+class MountApp < Prism::Application
+  mount '/admin', EchoMountedApp.new
+
+  get '/host-route' do
+    'host app route'
+  end
+end
+
+class MountPrecedenceApp < Prism::Application
+  mount '/shared', EchoMountedApp.new
+
+  get '/shared' do
+    'host app route wins'
+  end
+end
+
+class ApplicationMountTest < Minitest::Test
+  include TestSupport
+
+  def test_mounted_app_receives_rewritten_script_name_and_path_info
+    status, _, body = MountApp.call(env_for('GET', '/admin/users/1'))
+    assert_equal 200, status
+    assert_equal 'script_name=/admin path_info=/users/1', body.join
+  end
+
+  def test_mounted_app_receives_root_path_info_at_bare_prefix
+    _, _, body = MountApp.call(env_for('GET', '/admin'))
+    assert_equal 'script_name=/admin path_info=/', body.join
+  end
+
+  def test_host_applications_own_routes_take_precedence_over_mounts
+    status, _, body = MountPrecedenceApp.call(env_for('GET', '/shared'))
+    assert_equal 200, status
+    assert_equal 'host app route wins', body.join
+  end
+
+  def test_unmatched_path_outside_any_mount_still_404s
+    status, = MountApp.call(env_for('GET', '/nowhere'))
+    assert_equal 404, status
+  end
+end