Improve test coverage

[henrykironde]

Currently Codecov code coverage is at 60%. Let us aim for 75%+

[Nageshbansal]

@henrykironde, I have to increase the number of tests so that test coverage can improve?

[henrykironde]

Some lines of code are not tested, so we need to identify them and try to create tests to cover those lines.

[Nageshbansal]

@henrykironde , i have made 65% code coverage , should I make PR now ?

[henrykironde]

Yes make a PR so that I can review the changes.

[Nageshbansal]

@henrykironde can you please assign this issue to me, I'm working on this and I already increased coverage up to 65% by adding tests for create_socrata_dataset.

[Nageshbansal]

@henrykironde The SEDAC data source contains raster, vector datasets we can try to add these datasets.