How to run google tests completely isolated from each other?

Question

I want to use Address Sanitizer to detect runtime errors while unit tests are running. However, Address Sanitizer terminates the app when it finds the first error so I can't see an information of all found runtime errors in one report. It would be possible if I could run google tests isolated from each other, and termination of one test woudn't influence other ones.

Answer 1

You can run specific test cases in Google Test, one by one.

From: https://github.com/google/googletest/blob/master/googletest/docs/advanced.md#running-a-subset-of-the-tests

By default, a Google Test program runs all tests the user has defined. Sometimes, you want to run only a subset of the tests (e.g. for debugging or quickly verifying a change). If you set the GTEST_FILTER environment variable or the --gtest_filter flag to a filter string, Google Test will only run the tests whose full names (in the form of TestCaseName.TestName) match the filter.

The format of a filter is a ':'-separated list of wildcard patterns (called the positive patterns) optionally followed by a '-' and another ':'-separated pattern list (called the negative patterns). A test matches the filter if and only if it matches any of the positive patterns but does not match any of the negative patterns.

A pattern may contain '' (matches any string) or '?' (matches any single character). For convenience, the filter '-NegativePatterns' can be also written as '-NegativePatterns'.

For example:

./foo_test Has no flag, and thus runs all its tests.

./foo_test --gtest_filter=* Also runs everything, due to the single match-everything * value.

./foo_test --gtest_filter=FooTest.* Runs everything in test case FooTest.

./foo_test --gtest_filter=Null:Constructor Runs any test whose full name contains either "Null" or "Constructor".

./foo_test --gtest_filter=-DeathTest. Runs all non-death tests.

./foo_test --gtest_filter=FooTest.*-FooTest.Bar Runs everything in test case FooTest except FooTest.Bar.