Test Redirection with RSpec and Capybara (Rails)

Try current_path.should == "/projects/show"

Capybara also implements a current_url method for the fully qualified URL.

More info in the docs.

EDIT

Capybara now has a RSpec matcher called have_current_path, which you can use like: expect(page).to have_current_path(some_other_page_path) (thanks @bjliu)

Im not sure that this can be what you need, but in my tests I prefer such approach:

...
subject { page }
...
before do
    visit some_path_path
    # do anything else you need to be redirected
end
it "should redirect to some other page" do
    expect(page.current_path).to eq some_other_page_path
end