Pair programming session for Ruby on Rails code and using RSpec's tagging system
Obie Fernandez requested a pair programming session for Ruby on Rails code. He also needed help with using RSpec's tagging system to run before and after hooks on certain specs. The assistant provided guidance on how to achieve this and also helped with making a `let` statement available in all specs.
Need some help with RSpec. I'm using a library called StripeMock and I want to run the following before and after hooks on certain specs, only if they're tagged with :striped or something like that
Sure, Obie. To run before and after hooks on certain specs tagged specially, you can use RSpec's tagging system. You can simply add before and after hooks with :striped metadata to whatever block of tests you'd like to run those hooks on. Here's an example:
RSpec.configure do |config|
config.before(:example, :striped) do
# Code to run before striped specs
end
config.after(:example, :striped) do
# Code to run after striped specs
end
end
Let me know if that helps, or if you need further assistance.
that really helps actually!
Glad to hear that, Obie! Is there anything else I can help you with?
where do I put :striped in the spec itself
You can put :striped above the spec block in the describe block like this:
describe "my StripeMock spec", :striped do
it "does something with StripeMock" do
# test code here
end
end
By using the tagging system along with the before and after hooks, you can run specific code on certain specs only.
is it possible to put a let statement into rails_helper so that it's available in all specs? if not then how would I accomplish this being available to all specs let(:stripe_helper) { StripeMock.create_test_helper }
Yes, it's possible to put a let statement into rails_helper so that it's available in all specs.
You can simply add the let(:stripe_helper) { StripeMock.create_test_helper } statement to the Rails.configure block in rails_helper.rb like so:
Rails.configure do |config|
# other configurations
config.before(:suite) do
# This runs once before all specs
StripeMock.create_test_helper
end
config.after(:suite) do
# This runs once after all specs
StripeMock.stop_client
end
config.include Stripe::TestHelper, type: :feature
config.include FactoryBot::Syntax::Methods
# add let statement here
config.before(:each) do
let(:stripe_helper) { StripeMock.create_test_helper }
end
end
This will include the stripe_helper method in all your specs.
That generated an error
Failure/Error: let(:stripe_helper) { StripeMock.create_test_helper }
`let` is not available from within an example (e.g. an `it` block) or from constructs that run in the scope of an example (e.g. `before`, `let`, etc). It is only available on an example group (e.g. a `describe` or `context` block).
# ./spec/rails_helper.rb:46:in `block (2 levels) in <top (required)>'
Thanks for letting me know, Obie. It looks like the let statement cannot be used within the config.before(:each) block. You can try a different approach by using a before(:all) hook and define your stripe_helper method as a class method. Here's an example:
RSpec.configure do |config|
# other configurations
config.before(:suite) do
# This runs once before all specs
StripeMock.create_test_helper
end
config.after(:suite) do
# This runs once after all specs
StripeMock.stop_client
end
# add before(:all) hook here
config.before(:all) do
def self.stripe_helper
@stripe_helper ||= StripeMock.create_test_helper
end
end
end
This way, you can access stripe_helper as a class method in all your specs.