fixed deepl tests

deep_translator/deepl.py

@@ -12,7 +12,7 @@ class DeepL(object):
     """
     _languages = DEEPL_LANGUAGE_TO_CODE
 
-    def __init__(self, api_key=None, source="auto", target="en"):
+    def __init__(self, api_key=None, source="en", target="en"):
         """
         @param api_key: your DeepL api key.
         Get one here: https://www.deepl.com/docs-api/accessing-the-api/

deep_translator/tests/test_deepl.py

@@ -6,7 +6,7 @@ from deep_translator.exceptions import AuthorizationException
 
 @patch('deep_translator.deepl.requests')
 def test_simple_translation(mock_requests):
-    translator = DeepL(api_key='imagine-this-is-an-valid-api-key')
+    translator = DeepL(api_key='imagine-this-is-an-valid-api-key', source='en', target='es')
     # Set the request response mock.
     mock_response = Mock()
     mock_response.status_code = 200
@@ -16,14 +16,14 @@ def test_simple_translation(mock_requests):
         }]
     }
     mock_requests.get.return_value = mock_response
-    translation = translator.translate('en', 'es', 'hello')
+    translation = translator.translate('hello')
     assert translation == 'hola'
 
 
 @patch('deep_translator.deepl.requests.get')
 def test_wrong_api_key(mock_requests):
-    translator = DeepL(api_key='this-is-a-wrong-api-key!')
+    translator = DeepL(api_key='this-is-a-wrong-api-key!', source="en", target="es")
     # Set the response status_code only.
     mock_requests.return_value = Mock(status_code=403)
     with pytest.raises(AuthorizationException):
-        translator.translate('en', 'es', 'Hello')
+        translator.translate('Hello')