Add tests

tests/test_post.py

@@ -0,0 +1,24 @@
+import pytest
+from unittest.mock import AsyncMock, patch
+from app import post_image
+
+
+@pytest.mark.asyncio
+@patch("app.bot.send_photo", new_callable=AsyncMock)
+@patch("app.fetch_image", return_value=(
+    "https://example.com/full.png",
+    "tester",
+    "https://derpibooru.org/images/123",
+    ["gay", "cute"]
+))
+async def test_post_image_success(mock_fetch, mock_send_photo, tmp_path, monkeypatch):
+    """Тестируем успешную публикацию картинки"""
+
+    # временный файл для sent_images
+    monkeypatch.setattr("app.SENT_IMAGES_FILE", tmp_path / "sent.json")
+    monkeypatch.setattr("app.sent_images", set())
+
+    await post_image(tags=["gay"])
+
+    mock_fetch.assert_called_once()
+    mock_send_photo.assert_awaited_once()