Dev Tools · 1h ago
Integration Test Pattern Catches 3 Hidden Bugs in MCP Failure Library
A developer wrote integration tests for an MCP failure library that stores crash patterns for AI agents. The tests caught three bugs that had survived unit tests with 90%+ coverage. The harness uses real STDIO transport, SQLite database, and production retry logic without mocks.
Meridian48 take
The story underscores a common pitfall: high unit test coverage doesn't guarantee system reliability, especially in AI tooling where component interactions are critical.
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I Wrote Integration Tests for My MCP Failure Library. Here's the Pattern That Caught 3 Hidden Bugs. →
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