#!/usr/bin/env python3
#
# Copyright 2019 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Main entrypoint for all of atest's unittest."""

from importlib import import_module
import os
import sys
import unittest


def get_test_modules():
  """Returns a list of test modules.

  Finds all the test files (*_test.py) and get their relative
  path (internal/lib/utils_test.py) and translate it to an import path and
  strip the py ext (internal.lib.utils_test).

  Returns:
      List of strings (the testable module import path).
  """
  testable_modules = []
  package = os.path.dirname(os.path.realpath(__file__))
  base_path = os.path.dirname(package)

  for dirpath, _, files in os.walk(package):
    for f in files:
      if f.endswith('_test.py'):
        # Now transform it into a relative import path.
        full_file_path = os.path.join(dirpath, f)
        rel_file_path = os.path.relpath(full_file_path, base_path)
        rel_file_path, _ = os.path.splitext(rel_file_path)
        rel_file_path = rel_file_path.replace(os.sep, '.')
        testable_modules.append(rel_file_path)

  return testable_modules


def main(_):
  """Main unittest entry.

  Args:
      argv: A list of system arguments. (unused)

  Returns:
      0 if success. None-zero if fails.
  """
  test_modules = get_test_modules()
  for mod in test_modules:
    import_module(mod)

  loader = unittest.defaultTestLoader
  test_suite = loader.loadTestsFromNames(test_modules)
  runner = unittest.TextTestRunner(verbosity=2)
  result = runner.run(test_suite)
  sys.exit(not result.wasSuccessful())


if __name__ == '__main__':
  main(sys.argv[1:])