added s examples.

solid/single_responsability/file_manager_test.py

@@ -0,0 +1,24 @@
+from pathlib import Path
+
+from _pytest._py.path import LocalPath
+
+from solid.single_responsability.file_manager import FileManager
+
+
+class TestFileManagerTest:
+
+    def test_happy_path(self, tmpdir: LocalPath):
+        file_ = Path(tmpdir) / "something"
+        service = FileManager(file_)
+        service.write("le petit canard")
+        assert file_.is_file()
+        assert service.read() == "le petit canard"
+
+    def test_compressed_happy_path(self, tmpdir: LocalPath):
+        file_ = Path(tmpdir) / "something"
+        service = FileManager(file_)
+        service.write("le petit canard")
+        service.compress()
+        assert file_.read_bytes() != "le petit canard".encode('utf-8')
+        service.decompress()
+        assert service.read() == "le petit canard"