Add __fspath__ method to SimpleSQLite class: #86

Signed-off-by: Tsuyoshi Hombashi <[email protected]>

simplesqlite/core.py

@@ -198,6 +198,15 @@ def __enter__(self):  # type: ignore
     def __exit__(self, exc_type, exc_value, traceback) -> None:  # type: ignore
         self.close()
 
+    def __fspath__(self) -> str:
+        if not self.database_path:
+            raise ValueError("database is not connected")
+
+        if self.database_path == MEMORY_DB_NAME:
+            raise ValueError("database is in-memory")
+
+        return self.database_path
+
     def is_connected(self) -> bool:
         """
         :return: |True| if the connection to a database is valid.

test/test_simplesqlite.py

@@ -125,6 +125,13 @@ def test_exception_invalid_file(self, tmpdir, mode, expected):
             SimpleSQLite(str(p), mode).connection
 
 
+class Test_SimpleSQLite_fpath:
+    def test_normal_path(self, tmpdir):
+        p = tmpdir.join("test.sqlite3")
+        db_path = str(p)
+        assert os.fspath(SimpleSQLite(db_path, "w"))
+
+
 class Test_SimpleSQLite_is_connected:
     def test_normal(self, con):
         assert con.is_connected()