old_contents: import os
  import requests
  import requests_mock
  import unittest
  
  from .. import Client
  
  @requests_mock.Mocker()
  class TestClient(unittest.TestCase):
      """Tests the Acquia Cloud API client class."""
  
      req = None
  
      """
          def setup(self, ):
              " ""
              Set up the tests with the mock requests handler.
              " ""
              session = requests.Session()
              adapter = requests_mock.Adapter()
              session.mount('mock', adapter)
      """
  
      def test_find_credentials(self, m):
          """
          Tests finding the credentials in environment variables
          """
          os.environ['ACQUIA_CLOUD_API_USER'] = 'user'
          os.environ['ACQUIA_CLOUD_API_TOKEN'] = 'token'
          client = Client(cache=None)
          (user, token) = client._Client__find_credentials()
          self.assertEqual(user, 'user')
          self.assertEqual(token, 'token')
  
      def test_user(self, m):
          email = 'user@example.com'
          m.register_uri('GET',
                         'https://cloudapi.acquia.com/v1/me.json',
                         json={"authenticated_as": email}
                        )
          client = Client(email, 'token')
          user = client.user().get()
          self.assertEqual(user['authenticated_as'], email)
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import os
  import requests
  import requests_mock
  import unittest
  
  from .. import Client
  from ..exceptions import AcquiaCloudException
  
  @requests_mock.Mocker()
  class TestClient(unittest.TestCase):
      """Tests the Acquia Cloud API client class."""
  
      req = None
  
      """
          def setup(self, ):
              " ""
              Set up the tests with the mock requests handler.
              " ""
              session = requests.Session()
              adapter = requests_mock.Adapter()
              session.mount('mock', adapter)
      """
  
      def test_find_credentials(self, m):
          """
          Tests finding the credentials in environment variables
          """
          os.environ['ACQUIA_CLOUD_API_USER'] = 'user'
          os.environ['ACQUIA_CLOUD_API_TOKEN'] = 'token'
          client = Client(cache=None)
          (user, token) = client._Client__find_credentials()
          self.assertEqual(user, 'user')
          self.assertEqual(token, 'token')
  
      def test_find_credentials_none_set(self, m):
          """
          Tests finding the credentials in environment variables with empty credentials
          """
          os.environ['ACQUIA_CLOUD_API_USER'] = ''
          os.environ['ACQUIA_CLOUD_API_TOKEN'] = ''
          with self.assertRaises(AcquiaCloudException) as cm:
              client = Client(cache=None)
  
          self.assertEqual(str(cm.exception), 'Credentials not provided')
  
      def test_user(self, m):
          email = 'user@example.com'
          m.register_uri('GET',
                         'https://cloudapi.acquia.com/v1/me.json',
                         json={"authenticated_as": email}
                        )
          client = Client(email, 'token')
          user = client.user().get()
          self.assertEqual(user['authenticated_as'], email)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add test for failing to find credentials