fixing the test so it works for windows

pydra/engine/tests/test_task.py

@@ -1307,7 +1307,7 @@ def myhook_postrun(task, result, *args):
     assert "postrun task hook was called" in hook_messages[0]
 
 
-def test_traceback():
+def test_traceback(tmpdir):
     """ checking if the error raised in a function is properly returned;
         checking if there is an error filename in the error message that contains
         full traceback including the line in the python function
@@ -1317,23 +1317,24 @@ def test_traceback():
     def fun_error(x):
         raise Exception("Error from the function")
 
-    task = fun_error(name="error", x=[3, 4]).split("x")
+    task = fun_error(name="error", x=[3, 4], cache_dir=tmpdir).split("x")
 
     with pytest.raises(Exception, match="from the function") as exinfo:
         res = task()
 
     # getting error file from the error message
-    error_file_match = re.findall("[a-zA-Z0-9/_]+error.pklz", str(exinfo.value))
-    assert len(error_file_match)  # should be one error file in the error message
-    error_file = Path(error_file_match[0])
-    assert error_file.name == "_error.pklz"
+    error_file_match = str(exinfo.value).split("here: ")[-1].split("_error.pklz")[0]
+    error_file = Path(error_file_match) / "_error.pklz"
+    # checking if the file exists
+    assert error_file.exists()
+    # reading error message from the pickle file
     error_tb = cp.loads(error_file.read_bytes())["error message"]
     # the error traceback should be a list and should point to a specific line in the function
     assert isinstance(error_tb, list)
     assert "in fun_error" in error_tb[-2]
 
 
-def test_traceback_wf():
+def test_traceback_wf(tmpdir):
     """ checking if the error raised in a function is properly returned by a workflow;
         checking if there is an error filename in the error message that contains
         full traceback including the line in the python function
@@ -1343,18 +1344,19 @@ def test_traceback_wf():
     def fun_error(x):
         raise Exception("Error from the function")
 
-    wf = Workflow(name="wf", input_spec=["x"], x=[3, 4]).split("x")
+    wf = Workflow(name="wf", input_spec=["x"], x=[3, 4], cache_dir=tmpdir).split("x")
     wf.add(fun_error(name="error", x=wf.lzin.x))
     wf.set_output([("out", wf.error.lzout.out)])
 
     with pytest.raises(Exception, match="Task error raised an error") as exinfo:
         res = wf()
 
     # getting error file from the error message
-    error_file_match = re.findall("[a-zA-Z0-9/_]+error.pklz", str(exinfo.value))
-    assert len(error_file_match)  # should be one error file in the error message
-    error_file = Path(error_file_match[0])
-    assert error_file.name == "_error.pklz"
+    error_file_match = str(exinfo.value).split("here: ")[-1].split("_error.pklz")[0]
+    error_file = Path(error_file_match) / "_error.pklz"
+    # checking if the file exists
+    assert error_file.exists()
+    # reading error message from the pickle file
     error_tb = cp.loads(error_file.read_bytes())["error message"]
     # the error traceback should be a list and should point to a specific line in the function
     assert isinstance(error_tb, list)