diff --git a/t/README b/t/README
index 0e4e8d8862c96383a6f6f22a1b6bb01044925620..fecb76e599cee2643e4f6c05c44fa2585e807284 100644 (file)
--- a/t/README
+++ b/t/README
Merges the given rev using the given message. Like test_commit,
creates a tag and calls test_tick before committing.
+ - test_must_fail <git-command>
+
+ Run a git command and ensure it fails in a controlled way. Use
+ this instead of "! <git-command>". When git-command dies due to a
+ segfault, test_must_fail diagnoses it as an error; "! <git-command>"
+ treats it as just another expected failure, which would let such a
+ bug go unnoticed.
+
Tips for Writing Tests
----------------------