Allow current version id to be false

[mirefly]

Fixes #955 @kumar303

[codecov-io]

Codecov Report

Merging #969 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #969      +/-   ##
==========================================
+ Coverage    98.8%   98.81%   +<.01%     
==========================================
  Files          55       55              
  Lines        1761     1772      +11     
  Branches      449      454       +5     
==========================================
+ Hits         1740     1751      +11     
  Misses         15       15              
  Partials        6        6

Impacted Files	Coverage Δ
src/components/Navbar/index.tsx	100% <ø> (ø)	⬆️
src/reducers/versions.tsx	99.33% <100%> (ø)	⬆️
src/pages/Compare/index.tsx	100% <100%> (ø)	⬆️
src/pages/Index/index.tsx	96.29% <100%> (+0.29%)	⬆️
src/pages/Browse/index.tsx	100% <100%> (ø)	⬆️

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[kumar303]

Thanks for jumping into this one. It's looking really good but I noticed this issue:

• Go to http://localhost:3000/
• Click on browse a page
• Press the back button
• Click on browse a page again

The title disappears from the browse page. If you'd like any tips on where to look for solving it, just let me know.

[mirefly]

@kumar303 I updated Browse and Compare pages. It should be fine now.

[kumar303]

Nice work, @mirefly. It's getting close, I just have a few change requests.

[kumar303]

This is looking good, it just needs some additional test cases. If you get stuck setting up the state for those tests, let me know.

Here's a good way to develop it: temporarily set the if statement back to !currentVersionId and watch your new test fail. Fixing the if statement should pass the test.

[mirefly]

Thanks @kumar303 I added two test cases.

[kumar303]

@mirefly whoops, it looks like something landed on master that gave you a conflict. Can you merge this branch with master (or rebase on master) and resolve the conflict?

[mirefly]

Now it works.

[kumar303]

Nice work 👍 Thanks!