External script: run all gtest C++ tests from a given build target

[Carlos Knippschild]

Sharing this hoping it might be useful to others: I created a script that assists one in running all Google Test tests from a given test build target (the closed I could get to running all tests from a chromium folder). It can be found here:

https://github.com/chuim/chromium-dev-helpers/blob/master/tests-from-target.py

For further details, this is it's current documentation:

# Have you ever been annoyed by having to manually harvest test class names so

# that you can run a comprehensive set of tests from a Chromium subcomponent?

# Yes, well, me too! And here's the solution for it.

#

# This script generates a Google Test formatted filter string using all C++ test

# classes it can find given an output dir and one or more GN targets. For

# instance this call:

#

# tests-from-target.py out_linux/Debug components/offline_pages/core/background:unit_tests

#

# Generates this output as of today:

#

# AddRequestTaskTest.*:ChangeRequestsStateTaskTest.*:CleanupTaskTest.*:

# GetRequestsTaskTest.*:InitializeStoreTaskTest.*:MarkAttemptAbortedTaskTest.*:

# MarkAttemptCompletedTaskTest.*:MarkAttemptStartedTaskTest.*:

# PickRequestTaskTest.*:ReconcileTaskTest.*:RemoveRequestsTaskTest.*:

# RequestCoordinatorEventLoggerTest.*:RequestCoordinatorTest.*:

# RequestQueueStoreSQLTest.*:RequestQueueTest.*:SavePageRequestTest.*

#

# The most common usage case will be to use your shell's command substitution so

# that the script populates the filter argument of your test execution call.

# For Bash it would be something like this (if you are cool and use cr! ;):

#

# cr run components_unittests --gtest_filter=$(tests-from-target.py <OUT_DIR> <GN_TEST_TARGET>)