Hooks: Before and After
Knapsack Pro hooks are only available in Queue Mode.
If you are using RSpec or percy-capybara, read the dedicated sections below.
Knapsack exposes four hooks to execute arbitrary code before or after certain events:
KnapsackPro::Hooks::Queue.before_queue do |queue_id|
puts 'before_queue - run before the test suite'
end
KnapsackPro::Hooks::Queue.before_subset_queue do |queue_id, subset_queue_id|
puts 'before_subset_queue - run before the next subset of tests'
end
KnapsackPro::Hooks::Queue.after_subset_queue do |queue_id, subset_queue_id|
puts 'after_subset_queue - run after the previous subset of tests'
end
KnapsackPro::Hooks::Queue.after_queue do |queue_id|
puts 'after_queue - run after the test suite'
end
RSpec
If you are using Knapsack Pro in Queue Mode with RSpec, replace:
before(:suite) { ... }
after(:suite) { ... }
with:
KnapsackPro::Hooks::Queue.before_queue(:suite) { ... }
KnapsackPro::Hooks::Queue.after_queue(:suite) { ... }
Otherwise, Knapsack Pro would call before(:suite) and after(:suite) for each subset of tests.
For example, what follows are the hooks run with two subsets of tests:
before_queue
# First subset of tests from Knapsack Pro API
before :suite
first_spec.rb
second_spec.rb
after :suite
# Second subset of tests from Knapsack Pro API
before :suite
third_spec.rb
fourth_spec.rb
after :suite
after_queue
percy-capybara
percy-capybara < 4
If you are using Knapsack Pro in Queue Mode with percy-capybara < 4, replace:
before(:suite) { Percy::Capybara.initialize_build }
after(:suite) { Percy::Capybara.finalize_build }
with:
KnapsackPro::Hooks::Queue.before_queue { |queue_id| Percy::Capybara.initialize_build }
KnapsackPro::Hooks::Queue.after_queue { |queue_id| Percy::Capybara.finalize_build }
Otherwise, Knapsack Pro would call before(:suite) and after(:suite) for each subset of tests.
percy-capybara >= 4
If you are using Knapsack Pro in Queue Mode with percy-capybara >= 4, you need to configure the environment variables as explained in Percy's docs.
After that, you can use the following command:
npx percy exec -- rake knapsack_pro:queue:rspec
# or
npx percy exec -- knapsack_pro queue:rspec
Here you can find the docs for the knapsack_pro binary.