tests(api): add more tests to improve coverage

Author: vchrombie

tests/api/encoding_test.py

@@ -2,6 +2,7 @@
 import os
 import subprocess
 import unittest
+from unittest import mock
 
 from coveralls import Coveralls
 
@@ -54,3 +55,29 @@ def test_malformed_encoding_declaration_py3_or_coverage4():
             '    return 1'
         )
         assert 'branches' not in result[0]
+
+    def test_debug_bad_encoding(self):
+        """Test debug_bad_encoding handles UnicodeDecodeError."""
+        data = {
+            'source_files': [
+                {
+                    'name': 'bad_file.py',
+                    'source': 'def foo():\n    return "foo"\n',
+                    'coverage': [1, 1, 1],
+                }
+            ]
+        }
+
+        # Save the original json.dumps function
+        original_json_dumps = json.dumps
+
+        def mock_json_dumps(value):
+            if value == 'def foo():\n    return "foo"\n':
+                raise UnicodeDecodeError('utf8', b'', 0, 1, 'bad data')
+            else:
+                return original_json_dumps(value)
+
+        with mock.patch('coveralls.api.json.dumps', side_effect=mock_json_dumps):
+            with mock.patch('coveralls.api.log') as mock_log:
+                Coveralls.debug_bad_encoding(data)
+                mock_log.error.assert_called()

tests/api/reporter_test.py

@@ -1,6 +1,7 @@
 import os
 import subprocess
 import unittest
+from unittest import mock
 
 import pytest
 
@@ -267,3 +268,17 @@ def test_not_python(self):
                 match=r"Couldn't parse .* as Python",
         ):
             Coveralls(repo_token='xxx').get_coverage()
+
+    @mock.patch('requests.post')
+    def test_submit_report_422_github(self, mock_post):
+        """Test submit_report handles 422 status code with github service_name."""
+        response_mock = mock.Mock()
+        response_mock.status_code = 422
+        mock_post.return_value = response_mock
+
+        cov = Coveralls(repo_token='test_token', service_name='github')
+        cov.config['service_name'] = 'github'
+
+        with mock.patch('builtins.print') as mock_print:
+            cov.submit_report('{}')
+            mock_print.assert_called()