“Stripe has an extremely large Ruby codebase: our monorepo is the order of 50 million lines of Ruby code, backed by a correspondingly huge test suite—roughly 100,000 Ruby test files and approximately 1.2 million test units. / Selective Test Execution (STE) is how we keep CI fast and affordable"
Selective Test Execution at Stripe: Fast CI for a 50M-line Ruby monorepo
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