Tests can be good. Tests can be bad. - If you are writing a heavy algorithmic code, then write unit tests. - If you are writing glue code joining services,

Tests can be good. Tests can be bad. - If you are writing a heavy algorithmic code, then write unit tests. - If you are writing glue code joining services, then write integration tests. - Integrating with third-party services means you prefer circuit-breakers and production monitoring over tests. The tests should ideally be written along the axis of minimum change. Or the test code churn alone would slow down the product.