Add test for option.from_yaml() with missing env not required

Author: rmk135

tests/unit/providers/test_configuration_py2_py3.py

@@ -905,6 +905,32 @@ def test_missing_envs(self):
  self.assertIsNone(self.config.section1.value1())
  self.assertEqual(self.config.section1.value2(), '/path')
 
+ @unittest.skipIf(sys.version_info[:2] == (3, 4), 'PyYAML does not support Python 3.4')
+ def test_option_missing_envs(self):
+ del os.environ['CONFIG_TEST_ENV']
+ del os.environ['CONFIG_TEST_PATH']
+
+ self.config.option.from_yaml(self.config_file)
+
+ self.assertEqual(
+ self.config.option(),
+ {
+ 'section1': {
+ 'value1': None,
+ 'value2': '/path',
+ },
+ },
+ )
+ self.assertEqual(
+ self.config.option.section1(),
+ {
+ 'value1': None,
+ 'value2': '/path',
+ },
+ )
+ self.assertIsNone(self.config.option.section1.value1())
+ self.assertEqual(self.config.option.section1.value2(), '/path')
+
  @unittest.skipIf(sys.version_info[:2] == (3, 4), 'PyYAML does not support Python 3.4')
  def test_default_values(self):
  os.environ['DEFINED'] = 'defined'