is to summarize successes and failures in the test script and
exit with an appropriate error code.
+ - test_tick
+
+ Make commit and tag names consistent by setting the author and
+ committer times to defined stated. Subsequent calls will
+ advance the times by a fixed amount.
+
+ - test_commit <message> [<filename> [<contents>]]
+
+ Creates a commit with the given message, committing the given
+ file with the given contents (default for both is to reuse the
+ message string), and adds a tag (again reusing the message
+ string as name). Calls test_tick to make the SHA-1s
+ reproducible.
+
+ - test_merge <message> <commit-or-tag>
+
+ Merges the given rev using the given message. Like test_commit,
+ creates a tag and calls test_tick before committing.
Tips for Writing Tests
----------------------