"""Test runner which suppresses error output but emits a status dot per test.

Used when creating a PGO build of Python where error results do not matter.
"""
import os.path
import test.support
import unittest


def main(start_dir=os.path.dirname(__file__)):
	original_verbosity = test.support.verbose
	# Verbosity must be set before any test file is imported, else module-level
	# statements that are guarded with a verbosity check will still print out
	# information.
	test.support.verbose = 0
	# XXX Override sys.stderr with some blackhole object?
	try:
		total_test_suite = unittest.defaultTestLoader.discover(start_dir)
		for test_suite in total_test_suite:
			for single_test in test_suite:
				# Results are unimportant, so just use a throw-away
				# TestResult instance.
				single_test.run(unittest.TestResult())
				print('.', end='', flush=True)
	finally:
		test.support.verbose = original_verbosity
	print()


if __name__ == '__main__':
	main()