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What's the proper way to force an RSpec test to fail?
I'm considering 1.should == 2 however there's probably something better.
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How to stop running tests on the first failed test (fail fast tests in RSpec)? You may add a parameter to tell RSpec to stop running the test suite after N failed tests, for example: --fail-fast=3 . There is a downside to it.
RSpec is a Behavior-Driven Development tool for Ruby programmers. BDD is an approach to software development that combines Test-Driven Development, Domain Driven Design and Acceptance Test-Driven Planning. RSpec helps you do the TDD part of that equation, focusing on the documentation and design aspects of TDD.
I use the database_cleaner gem to scrub my test database before each test runs, ensuring a clean slate and stable baseline every time. By default, RSpec will actually do this for you, running every test with a database transaction and then rolling back that transaction after it finishes.
Capybara helps you test web applications by simulating how a real user would interact with your app. It is agnostic about the driver running your tests and comes with Rack::Test and Selenium support built in.
fail/raise will do the trick (they are aliases of each other).
specify "this test fails" do raise "this is my failure message" end Fails with:
1) failing this test fails Failure/Error: raise "this is my failure message" RuntimeError: this is my failure message If you are thinking of using raise/fail in a spec, you should consider that there are probably more explicit ways of writing your expectation.
Additionally, raise/fail doesn't play well with aggregate_failures because the exception short-circuits the block and won't run any following matchers.
If you need to mark a test as pending to make sure you get back to it, you could use the fail/raise, but you can also use pending.
# 🚫 Instead of this: it "should do something" do # ... raise "this needs to be implemented" end # ✅ Try this: it "should do something" do pending "this needs to be implemented" end If you need to ensure a block is not being executed, consider using the yield matchers. For example:
describe "Enumerable#any?" do # 🚫 Instead of this: it "doesn't yield to the block if the collection is empty" do [].any? { raise "it should not call this block" } end # ✅ Try this: it "doesn't yield to the block if the collection is empty" do expect { |b| [].any?(&b) }.not_to yield_control end end If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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