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+End-to-end and integration testing approaches, patterns and examples
+A collection of recipes for testing applications with testcontainers.
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+Use cases
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[ ] PlantUML-C4 - use icons for technologies
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[ ] SQL databases. For testing SQL, we could use SQLite, but ORMs actually don't ensure that the code is portable between different database versions.
+ Test the system with a real database that you're using in production.
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Testing integration with SFTP
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AWS mocks like Moto and LocalStack. DynamoDB, S3, SNS SQS etc.
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SQS in, SQS out
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Stubbing collaborator services with WireMock
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Webhooks. WireMock verified
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Testing scheduled jobs. Tomodachi jobs (separate REST endpoint for testing), k8 jobs running as a Python script (with DockerContainer.exec)
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Real infra/supporting services like bank-holidays or leader election
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+- Internal services - start real versions of them, but not try to test them
+- External services - mock them
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+Controlling the system state
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+- Start containers in parallel
+- Pre-pull required docker images in CI
+- Start containers only once, isolate the state with application means
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+Techniques
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+Misc
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+- Debugging. Stop the time by placing a breakpoint and inspect containers
+- Attach the debugger
+- Export test coverage
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