# Which Problems Are Solved
Integration tests are flaky due to eventual consistency.
# How the Problems Are Solved
Remove t.Parallel so that less concurrent requests on multiple instance
happen. This allows the projections to catch up more easily.
# Additional Changes
- none
# Additional Context
- none
# Which Problems Are Solved
We identified the need of caching.
Currently we have a number of places where we use different ways of
caching, like go maps or LRU.
We might also want shared chaches in the future, like Redis-based or in
special SQL tables.
# How the Problems Are Solved
Define a generic Cache interface which allows different implementations.
- A noop implementation is provided and enabled as.
- An implementation using go maps is provided
- disabled in defaults.yaml
- enabled in integration tests
- Authz middleware instance objects are cached using the interface.
# Additional Changes
- Enabled integration test command raceflag
- Fix a race condition in the limits integration test client
- Fix a number of flaky integration tests. (Because zitadel is super
fast now!) 🎸🚀
# Additional Context
Related to https://github.com/zitadel/zitadel/issues/8648
# Which Problems Are Solved
Use a single server instance for API integration tests. This optimizes
the time taken for the integration test pipeline,
because it allows running tests on multiple packages in parallel. Also,
it saves time by not start and stopping a zitadel server for every
package.
# How the Problems Are Solved
- Build a binary with `go build -race -cover ....`
- Integration tests only construct clients. The server remains running
in the background.
- The integration package and tested packages now fully utilize the API.
No more direct database access trough `query` and `command` packages.
- Use Makefile recipes to setup, start and stop the server in the
background.
- The binary has the race detector enabled
- Init and setup jobs are configured to halt immediately on race
condition
- Because the server runs in the background, races are only logged. When
the server is stopped and race logs exist, the Makefile recipe will
throw an error and print the logs.
- Makefile recipes include logic to print logs and convert coverage
reports after the server is stopped.
- Some tests need a downstream HTTP server to make requests, like quota
and milestones. A new `integration/sink` package creates an HTTP server
and uses websockets to forward HTTP request back to the test packages.
The package API uses Go channels for abstraction and easy usage.
# Additional Changes
- Integration test files already used the `//go:build integration`
directive. In order to properly split integration from unit tests,
integration test files need to be in a `integration_test` subdirectory
of their package.
- `UseIsolatedInstance` used to overwrite the `Tester.Client` for each
instance. Now a `Instance` object is returned with a gRPC client that is
connected to the isolated instance's hostname.
- The `Tester` type is now `Instance`. The object is created for the
first instance, used by default in any test. Isolated instances are also
`Instance` objects and therefore benefit from the same methods and
values. The first instance and any other us capable of creating an
isolated instance over the system API.
- All test packages run in an Isolated instance by calling
`NewInstance()`
- Individual tests that use an isolated instance use `t.Parallel()`
# Additional Context
- Closes#6684
- https://go.dev/doc/articles/race_detector
- https://go.dev/doc/build-cover
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Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>
