Test Budget: Time Constrained CI Feedback

Test Budget: Time Constrained CI Feedback

摘要

At Shopify we run more than 170,000 tests in our core monolith. Naturally, we're constantly exploring ways to make this faster, and the Test Infrastructure team analyzed the feasibility of introducing a test budget: a fixed amount of time for tests to run. The goal is to speed up the continuous integration (CI) test running phase by accepting more risk. To achieve that goal we used prioritization to reorder the test execution plan in order to increase the probability of a fast failure. Our analysis provided insights into the effectiveness of executing prioritized tests under a time constraint. The single most important finding was that we were able to find failures after we had run only 70% of the test-selection suite.