Tests Timekeeper interactions against fake time sources and fake RTC devices. During an integration test, Timekeeper launches and connects to dev_time_source, a fake time source that forwards connections to the integration test.
The test component implements a number of services:
fuchsia.time.Maintenance - provides timekeeper with a handle to a clock created by the test component.test.time.TimeSourceControl - allows a dev_time_source launched by Timekeeper to forward the fuchsia.time.external.* connections it receives from Timekeeper to the test component.In addition, the test launches a mock Cobalt component, which makes fuchsia.metrics.MetricEventLoggerFactory available to Timekeeper.
The tests in tests/faketime also use //src/lib/fake-clock. This allows the test to control the monotonic time as observed by Timekeeper under test. To support this, the fake-clock tests additionally launch the fake clock manager component, which makes fuchsia.testing.FakeClock available to Timekeeper.
Timekeeper and the timekeeper integration tests are currently components v1 components. As v2 provides significantly more support for injecting dependencies, much of the testing harness can be removed when migrating.