Fixing bug in Fido to allow download to path="./"

changelog/4058.bugfix.rst

@@ -0,0 +1 @@
+Fixes a bug in fido_factory to allow  path="./" in fido.fetch().

sunpy/net/fido_factory.py

@@ -332,7 +332,8 @@ def fetch(self, *query_results, path=None, max_conn=5, progress=True,
 
         """
         if path is not None:
-            exists = list(filter(lambda p: p.exists(), Path(path).parents))
+            exists = list(filter(lambda p: p.exists(), Path(path).resolve().parents))
+
             if not os.access(exists[0], os.W_OK):
                 raise PermissionError('You do not have permission to write'
                                       f' to the directory {exists[0]}.')

sunpy/net/tests/test_fido.py

@@ -124,6 +124,16 @@ def test_save_path_pathlib(tmpdir):
         assert f"eve{os.path.sep}0" in f
 
 
+@pytest.mark.remote_data
+def test_save_path_cwd(tmpdir):
+    qr = Fido.search(a.Instrument('EVE'), a.Time("2016/10/01", "2016/10/02"), a.Level(0))
+
+    # Test when path is ./ for current working directory
+    os.chdir(tmpdir)  # move into temp directory
+    files = Fido.fetch(qr, path="./")
+    for f in files:
+        assert pathlib.Path.cwd().joinpath(f).exists()
+
 """
 Factory Tests
 """