如何在Rails测试中指定POST参数？

test "should create post with specified parameters" do
  post :create, params: { post: { title: "My Title", content: "My Content" } }
  assert_response :redirect
  assert_redirected_to post_path(assigns(:post))
  assert_equal "My Title", assigns(:post).title
  assert_equal "My Content", assigns(:post).content
end