Failing "test_download_returns_dataset" unit test

[arijitde92]

In Windows 10 environment, when I ran the unit tests using python -m unittest, "test_download_returns_dataset" failed as shown in the screenshot below-

As we can see above, the the test fails at line 50 because the "my-spot" directory is saved as "D:\my-spot" in Windows instead of "\my-spot" as normally done in Linux environment. I think the code should check the existence of "my-spot" directory based on the OS as Windows uses "\" for path seperation.