fix: "previous month" button appears when selecting a date

[OlegDev1]

Description

Linked issue: #5193

Problem
Even though the min date is provided, when selecting the second month, "previous month" button still appears. It shouldn't happen, because the calendar from the screenshots starts at November.

Changes
Changed the calculation logic that determines whether previous month button should appear or not (borrowed some code from renderMonths, big thanks to @pmacmillan). Added a test case, in which a calendar is rendered with min date, after that the date from the second month is selected and it is expected for "previous month" button not to appear.

Screenshots

Calendar starts at November 7

Before

After

Contribution checklist

• I have followed the contributing guidelines.
• I have added sufficient test coverage for my changes.
• I have formatted my code with Prettier and checked for linting issues with ESLint for code readability.

[pullrequest]

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[pullrequest]

PullRequest Breakdown

Reviewable lines of change

+ 38
- 1

74% TSX (tests)
26% TSX

Type of change

Fix - These changes are likely to be fixing a bug or issue.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.89%. Comparing base (826ba90) to head (7069485).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5214   +/-   ##
=======================================
  Coverage   96.88%   96.89%           
=======================================
  Files          29       29           
  Lines        3375     3381    +6     
  Branches     1409     1418    +9     
=======================================
+ Hits         3270     3276    +6     
+ Misses        105      103    -2     
- Partials        0        2    +2     

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[pullrequest]

This PR looks good to me; the only "issue" isn't a big deal.

Jacob

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Reviewed with ❤️ by PullRequest

[pullrequest]

No merge blocking issues found. I would suggest to test that the button also re-appears if/when appropriate. Other than that, changes look fine. Thanks for the PR.

Frank T

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Reviewed with ❤️ by PullRequest

[OlegDev1]

Thank you very much for the review, I really appreciate it!

I have added an additional button check in the test case as Frank suggested. I also replaced the non-null assertion with an error check

[pullrequest]

Thank you very much for the review, I really appreciate it!

I have added an additional button check in the test case as Frank suggested. I also replaced the non-null assertion with an error check

👍

Frank T