Add unittest for invalid working directories

tests/api/test_flexible_calling.py

@@ -28,6 +28,68 @@ def test_no_dir_provided(self):
                 "INFO:root:No working_dir is specified",
             )
 
+    def test_invalid_str(self):
+        """This test checks when working directory is not a valid string,
+        if the program will behave correctly"""
+        with self.assertLogs() as logobs:
+            json_case_path = "./tests/api/data/flexible_calling_unit_test/verification_case_unit_test_Path.json"
+
+            # Change working_dir value in the json file to a invalid string
+            with open(json_case_path, "r") as f:
+                workflow_dict = json.load(f)
+                workflow_dict["working_dir"] = []
+
+            with open(json_case_path, "w") as f:
+                json.dump(workflow_dict, f)
+
+            workflow = Workflow(workflow=json_case_path)
+            self.assertEqual(
+                logobs.output[0],
+                "ERROR:root:working directory specified is not a valid string.",
+            )
+
+    def test_invalid_escape_sequence_path(self):
+        """This test checks when working directory is not a invalid escape sequence string,
+        if the program will behave correctly"""
+        with self.assertLogs() as logobs:
+            json_case_path = "./tests/api/data/flexible_calling_unit_test/verification_case_unit_test_Path.json"
+
+            # Change working_dir value in the json file to a invalid string
+            with open(json_case_path, "r") as f:
+                workflow_dict = json.load(f)
+                workflow_dict["working_dir"] = ".\tests\api\result"
+
+            with open(json_case_path, "w") as f:
+                json.dump(workflow_dict, f)
+
+            workflow = Workflow(workflow=json_case_path)
+            self.assertEqual(
+                logobs.output[0],
+                "ERROR:root:The working directory specified is an invalid escape sequence string.",
+            )
+
+    def test_Linux_path(self):
+        """This test check if the program can detect the working path provided is in Linux format."""
+        with self.assertLogs() as logobs:
+            json_case_path = "./tests/api/data/flexible_calling_unit_test/verification_case_unit_test_Path.json"
+
+            # Change working_dir value in the json file to a valid path in Linux format
+            with open(json_case_path, "r") as f:
+                workflow_dict = json.load(f)
+                workflow_dict["working_dir"] = "./tests/api/result"
+
+            with open(json_case_path, "w") as f:
+                json.dump(workflow_dict, f)
+
+            workflow = Workflow(workflow=json_case_path)
+            # change current working directory back
+            os.chdir("../../..")
+
+            self.assertEqual(
+                logobs.output[0],
+                "INFO:root:Change current working path to the specified path.",
+            )
+
 
 if __name__ == "__main__":
     unittest.main()