This directory contains the CTS tests for the Perfetto library.

Background

For information about what CTS is, please go to https://source.android.com/compatibility/cts/ where you will find information on the purpose of CTS and how to run these tests.

Test contents

The single GTest target (CtsPerfettoTestCases) contains the following notable test suites:

• PerfettoCtsTest - verifies that any Android app can operate as a perfetto producer.
• HeapprofdCtsTest - verifies that Android apps can be heap-profiled, and that the manifest-based opt-in is respected.
• The contents of perfetto/test/end_to_end_integrationtest.cc.

PerfettoCtsTest

The GTest suite is both the consumer of data as well as the driver the actual tests we wish to run. This target drives the tracing system by requesting tracing to start/stop and ensures the data it receives is correct. This mimics the role of real consumers acting as the driver for tracing on device. This suite is compiled and pushed to device and subsequently run using a shell account which gives us permissions to access the perfetto consumer socket.

The mock producer is an Android app with a thin Java wrapping around the C++ library interfaced using JNI. The purpose of this target is to ensure that the TraceProto received from the consumer is valid and then push some fake data. This ensures that any arbitrary app can push data to the Perfetto socket which can then be decoded by the GTest consumer.

HeapprofdCtsTest

The tests cover the intersection of profiling from-startup/at-runtime, and whether the target app is debuggable. The GTest binary handles the targets' lifetimes, acts as a profiling consumer, and asserts the contents of the resultant traces.