Forem: Malki Davis

Passings args into Rspec Shared Examples

Malki Davis — Tue, 20 Apr 2021 22:07:03 +0000

It is convenient to have shared examples for testing to DRY up our tests and tests models or controllers that share code. An example could be an extend or include in a model or a before action in a controller.

Create your shared example in the support directory (make sure it auto loads by adding Dir[Rails.root.join('spec', 'support', '**', '*.rb')].sort.each { |f| require f } to your spec_helper)

RSpec.shared_examples 'good stuff' do
  it 'runs some tests' do
    expect(arg).to be_valid
  end
end

Then pass in args as a block in your test:

  it_behaves_like "good stuff" do
    let(:arg) { create(:something) }
  end

Now you've got yourself a bunch of green tests with little effort!

Make remove column a reversible migration

Malki Davis — Tue, 20 Apr 2021 09:05:17 +0000

Today I learned in order to make a remove_column migration reversible (which I need often when tinkering in development with the perfect database setup) we need to add the the type which is not required for migrating the database.

remove_column :table, :column, :type

For just a few more characters, the investment definitely pays off in case of the need to reverse the migration (even if it's not only in development).

Redirecting to an external URL within React Router

Malki Davis — Tue, 18 Feb 2020 06:48:30 +0000

TIL: How to redirect to an external URL within react-router-dom

At my current development position at Astrolabe Diagnostics
I was tasked with a route loading a React component if the user was signed in, or redirecting to an external site. I wanted to do this from the route level instead of handling the redirect from the component.

We simply need to render a function assigning the window.location to the new site, and the user is redirected.

{this.state.session.user ? (
  <Route exact path="/" component={MyComponent} />
  ) : (
  <Route exact path="/" render={() => (window.location = "https://redirectsite.com")} />
)}