Function is_test_path 

pub fn is_test_path(path: &str) -> bool

True when a repository-relative path looks like a test file. Directory rules and file-name rules are kept apart: a test, tests, autotests, or __tests__ directory anywhere including the repository root, or a file name that starts with Qt’s tst_, starts with test_ in Python or Ruby, contains _test., .test., or .spec., is exactly test.rs or tests.rs, or ends with the C# Tests.cs (case-sensitive, so Contests.cs is a production file).