feat(scrapers): total refactor

tests/scrapers/test_registry.py

@@ -0,0 +1,58 @@
+import pytest
+
+from scrapers import ALL_SCRAPERS, get_scraper, list_platforms
+from scrapers.base import BaseScraper
+from scrapers.codeforces import CodeforcesScraper
+
+
+class TestScraperRegistry:
+    def test_get_scraper_valid_platform(self):
+        scraper_class = get_scraper("codeforces")
+        assert scraper_class == CodeforcesScraper
+        assert issubclass(scraper_class, BaseScraper)
+
+        scraper = scraper_class()
+        assert isinstance(scraper, BaseScraper)
+        assert scraper.platform_name == "codeforces"
+
+    def test_get_scraper_invalid_platform(self):
+        with pytest.raises(KeyError) as exc_info:
+            get_scraper("nonexistent")
+
+        error_msg = str(exc_info.value)
+        assert "nonexistent" in error_msg
+        assert "Available platforms" in error_msg
+
+    def test_list_platforms(self):
+        platforms = list_platforms()
+
+        assert isinstance(platforms, list)
+        assert len(platforms) > 0
+        assert "codeforces" in platforms
+
+        assert set(platforms) == set(ALL_SCRAPERS.keys())
+
+    def test_all_scrapers_registry(self):
+        assert isinstance(ALL_SCRAPERS, dict)
+        assert len(ALL_SCRAPERS) > 0
+
+        for platform_name, scraper_class in ALL_SCRAPERS.items():
+            assert isinstance(platform_name, str)
+            assert platform_name.islower()
+
+            assert issubclass(scraper_class, BaseScraper)
+
+            scraper = scraper_class()
+            assert scraper.platform_name == platform_name
+
+    def test_registry_import_consistency(self):
+        from scrapers.codeforces import CodeforcesScraper as DirectImport
+
+        registry_class = get_scraper("codeforces")
+        assert registry_class == DirectImport
+
+    def test_all_scrapers_can_be_instantiated(self):
+        for platform_name, scraper_class in ALL_SCRAPERS.items():
+            scraper = scraper_class()
+            assert isinstance(scraper, BaseScraper)
+            assert scraper.platform_name == platform_name