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.