Implement UPath.samefile (#261)

* tests: add samefile test case

* upath: implement samefile

* tests: datapath fix samefile test

Author: ap--

upath/_stat.py

@@ -142,6 +142,12 @@ def __repr__(self):
         seq_attrs = ", ".join(map("{0[0]}={0[1]}".format, zip(self._fields, self)))
         return f"{cls_name}({seq_attrs}, info={self._info!r})"
 
+    def __eq__(self, other):
+        if not isinstance(other, UPathStatResult):
+            return NotImplemented
+        else:
+            return self._info == other._info
+
     # --- access to the fsspec info dict ------------------------------
 
     @classmethod

upath/core.py

@@ -803,7 +803,12 @@ def is_socket(self) -> bool:
         return False
 
     def samefile(self, other_path) -> bool:
-        raise NotImplementedError
+        st = self.stat()
+        if isinstance(other_path, UPath):
+            other_st = other_path.stat()
+        else:
+            other_st = self.with_segments(other_path).stat()
+        return st == other_st
 
     @overload  # type: ignore[override]
     def open(

upath/tests/cases.py

@@ -317,9 +317,6 @@ def test_rglob(self, pathlib_base):
         expected = [*pathlib_base.rglob(pattern)]
         assert len(result) == len(expected)
 
-    def test_samefile(self):
-        pass
-
     def test_symlink_to(self):
         pass
 
@@ -545,3 +542,12 @@ def test_eq(self):
         assert p0 == p1
         assert p0 != p2
         assert p1 != p2
+
+    def test_samefile(self):
+        f1 = self.path.joinpath("file1.txt")
+        f2 = self.path.joinpath("file2.txt")
+
+        assert f1.samefile(f2) is False
+        assert f1.samefile(f2.path) is False
+        assert f1.samefile(f1) is True
+        assert f1.samefile(f1.path) is True

upath/tests/implementations/test_data.py

@@ -199,3 +199,8 @@ def test_fsspec_compat(self):
     def test_rmdir_not_empty(self):
         with pytest.raises(NotADirectoryError):
             self.path.rmdir()
+
+    def test_samefile(self):
+        f1 = self.path
+
+        assert f1.samefile(f1) is True