Add lock_test.py

[VenkateshPS]

Add unit test for lock library

#283

[jsf-clabot]

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1 out of 2 committers have signed the CLA.

✅ VenkateshPS
❌ Venkatesh Singh

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[KazuCocoa]

• Could you add a link to Add unit tests #283 in the description if this PR is related to that?
• Could you fix the CI first?

[KazuCocoa]

Why did you delete test/unit/webdriver/device/lock_test.py in 2b40605 and commit the test code in the root path? test/unit/webdriver/device/lock_test.py is better.

[KazuCocoa]

the code looks fine, but could you fix the CLA?
You have two commit which has different email addresses, I assume.

[VenkateshPS]

unable to resolve commits by different email id, will create a new pull request.

[KazuCocoa]

you probably can fix it with git rebase or sign the CLA with your another email though.