Fix issue with numbers added after decimal point appearing preceding the decimal point

[eVoloshchak]

Details

This is a fix for the regression caused by #10147.
This is a controlled input, but currently in updateAmount we update amount, but don't update the selection. All we need to do is

updateAmount(text) {
    this.setState((prevState) => {
        const amount = this.addLeadingZero(this.replaceAllDigits(text, this.props.fromLocaleDigit));
+       const selection = this.getNewSelection(prevState.selection, prevState.amount.length, amount.length);
        return this.validateAmount(amount)
-            ? {amount: this.stripCommaFromAmount(amount)}
+            ? {amount: this.stripCommaFromAmount(amount), selection}
            : prevState;
    });
}

However I noticed that now this piece of code is repeated 3 times, so created a separate method for it

Fixed Issues

$ #10928

Tests

1. Click FAB -> Request Money
2. Enter a decimal separator
3. Verify that the cursor is placed after 0. and numbers are being added after the decimal separator

PR Review Checklist

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  • I verified the steps cover any possible failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
  • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
• I checked that screenshots or videos are included for tests on all platforms
• I verified tests pass on all platforms & I tested again on:
  • iOS / native
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• If there are any errors in the console that are unrelated to this PR, I either fixed them (preferred) or linked to where I reported them in Slack
• I verified proper code patterns were followed (see Reviewing the code)
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  • I verified that comments were added to code that is not self explanatory
  • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
  • I verified any copy / text shown in the product was added in all src/languages/* files
  • I verified any copy / text that was added to the app is correct English and approved by marketing by tagging the marketing team on the original GH to get the correct copy.
  • I verified proper file naming conventions were followed for any new files or renamed files. All non-platform specific files are named after what they export and are not named "index.js". All platform-specific files are named for the platform the code supports as outlined in the README.
  • I verified the JSDocs style guidelines (in STYLE.md) were followed
• If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
• I verified that this PR follows the guidelines as stated in the Review Guidelines
• I verified other components that can be impacted by these changes have been tested, and I retested again (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar have been tested & I retested again)
• I verified all code is DRY (the PR doesn't include any logic written more than once, with the exception of tests)
• I verified any variables that can be defined as constants (ie. in CONST.js or at the top of the file that uses the constant) are defined as such
• If a new component is created I verified that:
  • A similar component doesn't exist in the codebase
  • All props are defined accurately and each prop has a /** comment above it */
  • Any functional components have the displayName property
  • The file is named correctly
  • The component has a clear name that is non-ambiguous and the purpose of the component can be inferred from the name alone
  • The only data being stored in the state is data necessary for rendering and nothing else
  • For Class Components, any internal methods passed to components event handlers are bound to this properly so there are no scoping issues (i.e. for onClick={this.submit} the method this.submit should be bound to this in the constructor)
  • Any internal methods bound to this are necessary to be bound (i.e. avoid this.submit = this.submit.bind(this); if this.submit is never passed to a component event handler like onClick)
  • All JSX used for rendering exists in the render method
  • The component has the minimum amount of code necessary for its purpose, and it is broken down into smaller components in order to separate concerns and functions
• If a new CSS style is added I verified that:
  • A similar style doesn't already exist
  • The style can't be created with an existing StyleUtils function (i.e. StyleUtils.getBackgroundAndBorderStyle(themeColors.componentBG)
• If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
• If the PR modifies a component related to any of the existing Storybook stories, I tested and verified all stories for that component are still working as expected.
• I have checked off every checkbox in the PR reviewer checklist, including those that don't apply to this PR.

QA Steps

1. Click FAB -> Request Money
2. Enter a decimal separator
3. Verify that the cursor is placed after 0. and numbers are being added after the decimal separator

Screenshots

Web

Screen.Recording.2022-09-21.at.20.23.44.mov

Mobile Web - Chrome

22-09-21-21-31-46.mp4

Mobile Web - Safari

Screen.Recording.2022-09-21.at.20.35.08.mov

Desktop

Screen.Recording.2022-09-21.at.20.41.41.mov

iOS

Screen.Recording.2022-09-21.at.20.33.43.mov

Android

22-09-21-21-08-13.mp4

[NikkiWines]

Looks good + works well. Adding @chiragsalian as a reviewer since he has context from the original PR

[chiragsalian]

LGTM

[melvin-bot]

@chiragsalian looks like this was merged without passing tests. Please add a note explaining why this was done and remove the Emergency label if this is not an emergency.

[chiragsalian]

Not emergency, tests were passing fine.

[OSBotify]

🚀 Deployed to staging by @chiragsalian in version: 1.2.7-1 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

[OSBotify]

🚀 Deployed to production by @roryabraham in version: 1.2.7-2 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅