[CIFuzz][NFC] Add tests for config_utils and do some minor refactoring (#6128)

infra/cifuzz/config_utils.py

@@ -20,11 +20,20 @@ import json
 
 import environment
 
+DEFAULT_LANGUAGE = 'c++'
+DEFAULT_SANITIZER = 'address'
+
 
 def _get_project_repo_owner_and_name():
-  # Includes owner and repo name.
-  github_repository = os.getenv('GITHUB_REPOSITORY', '')
-  return os.path.split(github_repository)
+  """Returns a tuple containing the project repo owner and the name of the
+  repo."""
+  # On GitHub this includes owner and repo name.
+  repository = os.getenv('GITHUB_REPOSITORY', '')
+  # Use os.path.split. When GITHUB_REPOSITORY just contains the name of the
+  # repo, this will return a tuple containing an empty string and the repo name.
+  # When GITHUB_REPOSITORY contains the repo owner followed by a slash and then
+  # the repo name, it will return a tuple containing the owner and repo name.
+  return os.path.split(repository)
 
 
 def _get_pr_ref(event):
@@ -34,7 +43,7 @@ def _get_pr_ref(event):
 
 
 def _get_sanitizer():
-  return os.getenv('SANITIZER', 'address').lower()
+  return os.getenv('SANITIZER', DEFAULT_SANITIZER).lower()
 
 
 def _is_dry_run():
@@ -59,9 +68,6 @@ def get_project_src_path(workspace):
   return os.path.join(workspace, path)
 
 
-DEFAULT_LANGUAGE = 'c++'
-
-
 def _get_language():
   """Returns the project language."""
   # Get language from environment. We took this approach because the convenience
@@ -90,8 +96,10 @@ class BaseConfig:
     self.oss_fuzz_project_name = os.getenv('OSS_FUZZ_PROJECT_NAME')
     self.project_repo_owner, self.project_repo_name = (
         _get_project_repo_owner_and_name())
+
     # Check if failures should not be reported.
     self.dry_run = _is_dry_run()
+
     self.sanitizer = _get_sanitizer()
     # TODO(ochang): Error out if both oss_fuzz and build_integration_path is not
     # set.

infra/cifuzz/config_utils_test.py

@@ -18,7 +18,7 @@ import unittest
 import config_utils
 import test_helpers
 
-# pylint: disable=no-self-use
+# pylint: disable=no-self-use,protected-access
 
 
 class BaseConfigTest(unittest.TestCase):
@@ -105,5 +105,60 @@ class RunFuzzersConfigTest(unittest.TestCase):
     self.assertEqual(config.run_fuzzers_mode, run_fuzzers_mode)
 
 
+class GetProjectRepoOwnerAndNameTest(unittest.TestCase):
+  """Tests for _get_project_repo_owner_and_name."""
+
+  def setUp(self):
+    test_helpers.patch_environ(self)
+    self.repo_owner = 'repo-owner'
+    self.repo_name = 'repo-name'
+
+  def test_unset_repository(self):
+    """Tests that the correct result is returned when repository is not set."""
+    self.assertEqual(config_utils._get_project_repo_owner_and_name(), ('', ''))
+
+  def test_empty_repository(self):
+    """Tests that the correct result is returned when repository is an empty
+    string."""
+    os.environ['GITHUB_REPOSITORY'] = ''
+    self.assertEqual(config_utils._get_project_repo_owner_and_name(), ('', ''))
+
+  def test_github_repository(self):
+    """Tests that the correct result is returned when repository contains the
+    owner and repo name (as it does on GitHub)."""
+    os.environ['GITHUB_REPOSITORY'] = f'{self.repo_owner}/{self.repo_name}'
+    self.assertEqual(config_utils._get_project_repo_owner_and_name(),
+                     (self.repo_owner, self.repo_name))
+
+  def test_nongithub_repository(self):
+    """Tests that the correct result is returned when repository contains the
+    just the repo name (as it does outside of GitHub)."""
+    os.environ['GITHUB_REPOSITORY'] = self.repo_name
+    self.assertEqual(config_utils._get_project_repo_owner_and_name(),
+                     ('', self.repo_name))
+
+
+class GetSanitizerTest(unittest.TestCase):
+  """Tests for _get_sanitizer."""
+
+  def setUp(self):
+    test_helpers.patch_environ(self)
+    self.sanitizer = 'memory'
+
+  def test_default_value(self):
+    """Tests that the default value returned by _get_sanitizer is correct."""
+    self.assertEqual(config_utils._get_sanitizer(), 'address')
+
+  def test_normal_case(self):
+    """Tests that _get_sanitizer returns the correct value in normal cases."""
+    os.environ['SANITIZER'] = self.sanitizer
+    self.assertEqual(config_utils._get_sanitizer(), self.sanitizer)
+
+  def test_capitalization(self):
+    """Tests that that _get_sanitizer handles capitalization properly."""
+    os.environ['SANITIZER'] = self.sanitizer.upper()
+    self.assertEqual(config_utils._get_sanitizer(), self.sanitizer)
+
+
 if __name__ == '__main__':
   unittest.main()