2 files changed, 79 insertions, 35 deletions
diff --git a/tests/bot/cogs/test_snekbox.py b/tests/bot/cogs/test_snekbox.py
index 343e37db9..f22952931 100644
--- a/tests/bot/cogs/test_snekbox.py
+++ b/tests/bot/cogs/test_snekbox.py
@@ -1,5 +1,4 @@
 import asyncio
-import logging
 import unittest
 from unittest.mock import AsyncMock, MagicMock, Mock, call, create_autospec, patch
 
@@ -39,43 +38,14 @@ class SnekboxTests(unittest.IsolatedAsyncioTestCase):
         result = await self.cog.upload_output("-" * (snekbox.MAX_PASTE_LEN + 1))
         self.assertEqual(result, "too long to upload")
 
-    async def test_upload_output(self):
+    @patch("bot.cogs.snekbox.send_to_paste_service")
+    async def test_upload_output(self, mock_paste_util):
         """Upload the eval output to the URLs.paste_service.format(key="documents") endpoint."""
-        key = "MarkDiamond"
-        resp = MagicMock()
-        resp.json = AsyncMock(return_value={"key": key})
-
-        context_manager = MagicMock()
-        context_manager.__aenter__.return_value = resp
-        self.bot.http_session.post.return_value = context_manager
-
-        self.assertEqual(
-            await self.cog.upload_output("My awesome output"),
-            constants.URLs.paste_service.format(key=key)
-        )
-        self.bot.http_session.post.assert_called_with(
-            constants.URLs.paste_service.format(key="documents"),
-            data="My awesome output",
-            raise_for_status=True
+        await self.cog.upload_output("Test output.")
+        mock_paste_util.assert_called_once_with(
+            self.bot.http_session, "Test output.", extension="txt"
         )
 
-    async def test_upload_output_gracefully_fallback_if_exception_during_request(self):
-        """Output upload gracefully fallback if the upload fail."""
-        resp = MagicMock()
-        resp.json = AsyncMock(side_effect=Exception)
-
-        context_manager = MagicMock()
-        context_manager.__aenter__.return_value = resp
-        self.bot.http_session.post.return_value = context_manager
-
-        log = logging.getLogger("bot.cogs.snekbox")
-        with self.assertLogs(logger=log, level='ERROR'):
-            await self.cog.upload_output('My awesome output!')
-
-    async def test_upload_output_gracefully_fallback_if_no_key_in_response(self):
-        """Output upload gracefully fallback if there is no key entry in the response body."""
-        self.assertEqual((await self.cog.upload_output('My awesome output!')), None)
-
     def test_prepare_input(self):
         cases = (
             ('print("Hello world!")', 'print("Hello world!")', 'non-formatted'),
diff --git a/tests/bot/utils/test_services.py b/tests/bot/utils/test_services.py
new file mode 100644
index 000000000..5e0855704
--- /dev/null
+++ b/tests/bot/utils/test_services.py
@@ -0,0 +1,74 @@
+import logging
+import unittest
+from unittest.mock import AsyncMock, MagicMock, Mock, patch
+
+from aiohttp import ClientConnectorError
+
+from bot.utils.services import FAILED_REQUEST_ATTEMPTS, send_to_paste_service
+
+
+class PasteTests(unittest.IsolatedAsyncioTestCase):
+    def setUp(self) -> None:
+        self.http_session = MagicMock()
+
+    @patch("bot.utils.services.URLs.paste_service", "https://paste_service.com/{key}")
+    async def test_url_and_sent_contents(self):
+        """Correct url was used and post was called with expected data."""
+        response = MagicMock(
+            json=AsyncMock(return_value={"key": ""})
+        )
+        self.http_session.post().__aenter__.return_value = response
+        self.http_session.post.reset_mock()
+        await send_to_paste_service(self.http_session, "Content")
+        self.http_session.post.assert_called_once_with("https://paste_service.com/documents", data="Content")
+
+    @patch("bot.utils.services.URLs.paste_service", "https://paste_service.com/{key}")
+    async def test_paste_returns_correct_url_on_success(self):
+        """Url with specified extension is returned on successful requests."""
+        key = "paste_key"
+        test_cases = (
+            (f"https://paste_service.com/{key}.txt", "txt"),
+            (f"https://paste_service.com/{key}.py", "py"),
+            (f"https://paste_service.com/{key}", ""),
+        )
+        response = MagicMock(
+            json=AsyncMock(return_value={"key": key})
+        )
+        self.http_session.post().__aenter__.return_value = response
+
+        for expected_output, extension in test_cases:
+            with self.subTest(msg=f"Send contents with extension {repr(extension)}"):
+                self.assertEqual(
+                    await send_to_paste_service(self.http_session, "", extension=extension),
+                    expected_output
+                )
+
+    async def test_request_repeated_on_json_errors(self):
+        """Json with error message and invalid json are handled as errors and requests repeated."""
+        test_cases = ({"message": "error"}, {"unexpected_key": None}, {})
+        self.http_session.post().__aenter__.return_value = response = MagicMock()
+        self.http_session.post.reset_mock()
+
+        for error_json in test_cases:
+            with self.subTest(error_json=error_json):
+                response.json = AsyncMock(return_value=error_json)
+                result = await send_to_paste_service(self.http_session, "")
+                self.assertEqual(self.http_session.post.call_count, FAILED_REQUEST_ATTEMPTS)
+                self.assertIsNone(result)
+
+            self.http_session.post.reset_mock()
+
+    async def test_request_repeated_on_connection_errors(self):
+        """Requests are repeated in the case of connection errors."""
+        self.http_session.post = MagicMock(side_effect=ClientConnectorError(Mock(), Mock()))
+        result = await send_to_paste_service(self.http_session, "")
+        self.assertEqual(self.http_session.post.call_count, FAILED_REQUEST_ATTEMPTS)
+        self.assertIsNone(result)
+
+    async def test_general_error_handled_and_request_repeated(self):
+        """All `Exception`s are handled, logged and request repeated."""
+        self.http_session.post = MagicMock(side_effect=Exception)
+        result = await send_to_paste_service(self.http_session, "")
+        self.assertEqual(self.http_session.post.call_count, FAILED_REQUEST_ATTEMPTS)
+        self.assertLogs("bot.utils", logging.ERROR)
+        self.assertIsNone(result)