Fix #1898: add unit tests for FractionInputIsExactlyEqualToRuleClassifierProvider

[TheRealJessicaLi]

@rt4914 PTAL

Explanation

Fixed #1898 by adding testing for FractionInputIsExactlyEqualToRuleClassifierProvider which was copied from the Oppia web repo.

Checklist

• The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
• The PR explanation includes the words "Fixes #bugnum: ..." (or "Fixes part of #bugnum" if the PR only partially fixes an issue).
• The PR follows the style guide.
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• The PR is made from a branch that's not called "develop".
• The PR is made from a branch that is up-to-date with "develop".
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[oppiabot]

Hi! @TheRealJessicaLi, Welcome to Oppia! Please could you follow the instructions here to get started? You'll need to do this before we can accept your PR. I am closing this PR for now. Feel free to re-open it once you are done with the above instructions. Thanks!

[BenHenning]

Looks like when you filled out the form, there was an extra space before your name which caused Oppiabot to get confused @TheRealJessicaLi :). It shouldn't auto-close this time.

[BenHenning]

@TheRealJessicaLi it looks like you have lint failures. Please look at https://github.com/oppia/oppia-android/wiki/Ktlint-Guide for how to setup & run ktlint locally.

[TheRealJessicaLi]

@TheRealJessicaLi it looks like you have lint failures. Please look at https://github.com/oppia/oppia-android/wiki/Ktlint-Guide for how to setup & run ktlint locally.

Fixed, thanks!

[anandwana001]

Thought to mention here, we also need to remove the TODO comment from it's respective FractionInputIsExactlyEqualToRuleClassifierProvider file.

[TheRealJessicaLi]

Thought to mention here, we also need to remove the TODO comment from it's respective FractionInputIsExactlyEqualToRuleClassifierProvider file.

Fixed, thanks!

[BenHenning]

Thanks @TheRealJessicaLi! This looks really good! I honestly only have a few nits about styling & naming for the tests. Coverage wise this looks great!

[BenHenning]

@rt4914 solving this might be a nice SLoP project idea if we split it up & update the TODOs (or just require that students search for them).

/cc @MohamedMedhat1998 @aggarwalpulkit596 @Sarthak2601

[MohamedMedhat1998]

This one too TODO(#59): Figure out a way to reuse modules instead of needing to re-declare them.
But I think it will be tricky.

[BenHenning]

@MohamedMedhat1998 I don't think that's actually possible without something like Dagger Hilt which, as far as I'm aware, doesn't yet have full Gradle support. I was planning to adopt that once Bazel work is completed.

[TheRealJessicaLi]

Thanks @TheRealJessicaLi! This looks really good! I honestly only have a few nits about styling & naming for the tests. Coverage wise this looks great!

Thanks for the tips, just refactored everything to name things more explicitly

[BenHenning]

This is excellent, thanks @TheRealJessicaLi! I have no further comments. :) Going ahead and merging this.