Add tests to increase coverage

[linababenko]

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran npm run dtslint with success and extended the tests and types if necessary.
• I ran npm run test:unit with success.
• I have executed npm run test:cov and my test cases do cover all lines and branches of the added code.
• I ran npm run build-all and tested the resulting file/'s from dist folder in a browser.
• I have updated the CHANGELOG.md file in the root folder.
• I have tested my code on the live network.

[coveralls]

Coverage increased (+0.3%) to 90.591% when pulling 2ecb6aa on linababenko:add_tests into 6862c59 on ethereum:1.x.

[ryanio]

Hey @linababenko, thanks for your contributions!

Just wondering, how did you decide to add these tests in particular? If you check out Coveralls you can see some more info about the library source files and which lines are or aren't covered by the current test suite.

[GregTheGreek]

@linababenko I'd love to get this merged in, could you ensure your branch is up-to-date?

[github-actions]

This PR has been automatically marked as stale beacause it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions. If you believe this was a mistake, please comment.

[github-actions]

This PR has been automatically marked as stale beacause it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions. If you believe this was a mistake, please comment.

[cokia]

I think this is a good test case addition PR, and I don't think it should be kept stale!

[github-actions]

This PR has been automatically marked as stale beacause it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions. If you believe this was a mistake, please comment.