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Generally, I think tests are used to validate changes to your service code (often as a gate to release it to production). Whereas monitoring is used to detect i

Generally, I think tests are used to validate changes to your service code (often as a gate to release it to production). Whereas monitoring is used to detect issues external to your code (often operated in production). Edit: That is to say, what distinguishes testing from monitoring isn’t content, but purpose.

joshribakoff 5y ago
Monitoring can catch issues in the code. For example if an event is dead lettered or the application crashes unexpectedly, it triggers an alert, which may make you aware of some edge case you forgot to test. Both tests and monitoring can encompass validating code is running correctly, some even run their tests against production at regular intervals as a form of monitoring, for example see “datadog synthetic tests”, which could be characterized as both a test and a monitor. Many companies opting not to do traditional e2e tests actually still have them, they’re just running them against production instead of blocking CI (with the rationale they will prioritize fast detection and mitigation rather than trying to prevent bugs from entering prod)