Open-source cypress for back end testing
For the past few months we’ve been building a simple jest/typescript-based high-level language for writing and running integration tests. We're open-sourcing it now and are excited to share it with you: https://github.com/traceloop/jest-opentelemetry Why we built this: - There are many solid frameworks for FE / browser testing, but none with high-level constructs for testing BE flows - We were missing a way to validate side effects for complex backend systems, especially across async queueing systems Our beta version lets you send an API call to a system and…
In plain words
This open-source tool is a Jest and TypeScript-based framework for writing and running backend integration tests. It allows developers to send API calls to a system and validate downstream effects, including calls to microservices via REST and gRPC, as well as database queries and writes. Using OpenTelemetry for observability, it addresses the gap in testing frameworks for complex backend flows and asynchronous systems, offering high-level constructs specifically designed for backend testing rather than frontend browser testing.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
For the past few months we’ve been building a simple jest/typescript-based high-level language for writing and running integration tests. We're open-sourcing it now and are excited to share it with you: https://github.com/traceloop/jest-opentelemetry Why we built this: - There are many solid frameworks for FE / browser testing, but none with high-level constructs for testing BE flows - We were missing a way to validate side effects for complex backend systems, especially across async queueing systems Our beta version lets you send an API call to a system and then: - Validate (=assert) calls to any downstream microservice in REST and GRPC - Validate queries/writes to DBs Assertions are validated through the use of OpenTelemetry, as we see it as an easy-to-use way to observe how backend systems behave. We’re still early so would love your feedback and opinions. It's all open-source with Apache 2.0 license. GitHub: https://github.com/traceloop/jest-opentelemetry
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