[No QA] Add characterization tests for NumberWithSymbolForm

[jmgraa]

Explanation of Change

Adds characterization UI tests for NumberWithSymbolForm ahead of the composition refactor.

NumberWithSymbolForm previously had no dedicated coverage; only the portrait path was exercised indirectly via other screens. This PR adds tests/ui/NumberWithSymbolFormTest.tsx and locks current behavior for all three render paths plus shared contracts, with no production code changes:

1. displayAsTextInput — plain TextInput (no pad / ScrollView), setFormattedNumber / addLeadingZero, internal flip via handleFlipPress, currency button props
2. Landscape — row layout, pad-driven setNewNumber, flip via caller toggleNegative, currency via onSymbolButtonPress
3. Portrait — wrapper / pad / footer / currency + flip buttons, same pad and flip contracts as landscape
4. Shared — NumberWithSymbolFormRef (getNumber / updateNumber / clearSelection), selection handling, validation (maxLength / decimals / negatives), clearNegative on backspace of an empty negative value, ScrollView rendering and button interactions

These tests are the regression net for later migration batches.

Fixed Issues

$ #98168
PROPOSAL #97970

Tests

• Run npm run test -- tests/ui/NumberWithSymbolFormTest.tsx and confirm all suites pass

• Confirm the suite covers:

  • displayAsTextInput path (no pad / ScrollView; leading zero; flip; currency)
  • Landscape path (layout, pad, toggleNegative, currency)
  • Portrait path (wrapper, pad, buttons, flip)
  • Imperative ref API (getNumber, updateNumber, clearSelection)
  • Selection, validation, and clearNegative on empty negative backspace

• Confirm src/components/NumberWithSymbolForm.tsx is unchanged (diff is test-only)

• Verify that no errors appear in the JS console

Offline tests

N/A — test-only change; no runtime / network behavior.

QA Steps

N/A

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I wrote clear testing steps that cover the changes made in this PR
  • I added steps for local testing in the Tests section
  • I added steps for the expected offline behavior in the Offline steps section
  • I added steps for Staging and/or Production testing in the QA steps section
  • I added steps to cover 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 tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
• I included screenshots or videos for tests on all platforms
• I ran the tests on all platforms & verified they passed on:
  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
• I verified there are no console errors (if there's a console error not related to the PR, report it or open an issue for it to be fixed)
• I followed proper code patterns (see Reviewing the code)
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  • 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 that was added to the app is grammatically correct in English. It adheres to proper capitalization guidelines (note: only the first word of header/labels should be capitalized), and is either coming verbatim from figma or has been approved by marketing (in order to get marketing approval, ask the Bug Zero team member to add the Waiting for copy label to the issue)
• If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
• I followed the guidelines as stated in the Review Guidelines
• I tested other components that can be impacted by my changes (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar are working as expected)
• 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(theme.componentBG))
• If new assets were added or existing ones were modified, I verified that:
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• If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
• 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.
• If the PR modifies a component or page that can be accessed by a direct deeplink, I verified that the code functions as expected when the deeplink is used - from a logged in and logged out account.
• If the PR modifies the UI (e.g. new buttons, new UI components, changing the padding/spacing/sizing, moving components, etc) or modifies the form input styles:
  • I verified that all the inputs inside a form are aligned with each other.
  • I added Design label and/or tagged @Expensify/design so the design team can review the changes.
• I added unit tests for any new feature or bug fix in this PR to help automatically prevent regressions in this user flow.
• If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.

[jakubstec]

nit/question: as I understand it, these quirk tests exist to preserve compatibility during the refactor - are we planning to drop them or fix the behavior to the "proper" one once all the migration steps are done? 😄

[jmgraa]

Yes, these tests just freeze current behavior so the refactor doesn’t change it by accident. We’ll keep them through the migration and then fix it in a follow-up

[jakubstec]

1 minor NIT comment and 1 question regarding future steps - otherwise LGTM 🙏

[dariusz-biela]

Everything else looks fine

[melvin-bot]

@bernhardoj Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

[bernhardoj]

This makes me think that it would be great if we had a visual regression testing tool to catch unintentional visual changes when doing this kind of refactor.

[jmgraa]

@bernhardoj Thanks for the feedback, I've addressed all of your code comments

Regarding the visual regression tool, I like the idea and agree it would be helpful for catching unexpected UI shifts in such refactors. However, setting it up might be a bit tricky without a clear spec or specific toolchain in mind though. A proposal would be the best way forward if you want to run with this.

[bernhardoj]

However, setting it up might be a bit tricky without a clear spec or specific toolchain in mind though. A proposal would be the best way forward if you want to run with this.

Yeah. I don't mean to do it here, just wanna share my thought haha

[mountiny]

@bernhardoj can you add checklist please?

[bernhardoj]

Reviewer Checklist

• I have verified the author checklist is complete (all boxes are checked off).
• I verified the correct issue is linked in the ### Fixed Issues section above
• I verified testing steps are clear and they cover the changes made in this PR
  • I verified the steps for local testing are in the Tests section
  • I verified the steps for Staging and/or Production testing are in the QA steps section
  • 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 included screenshots or videos for tests on all platforms
• I verified that the composer does not automatically focus or open the keyboard on mobile unless explicitly intended. This includes checking that returning the app from the background does not unexpectedly open the keyboard.
• I verified tests pass on all platforms & I tested again on:
  • Android: HybridApp
  • Android: mWeb Chrome
  • iOS: HybridApp
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
• 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)
  • 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 that was added to the app is grammatically correct in English. It adheres to proper capitalization guidelines (note: only the first word of header/labels should be capitalized), and is either coming verbatim from figma or has been approved by marketing (in order to get marketing approval, ask the Bug Zero team member to add the Waiting for copy label to the issue)
• 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)
• If a new component is created I verified that:
  • A similar component doesn't exist in the codebase
  • All props are defined accurately
  • 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
  • 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(theme.componentBG)
• If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
• 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.
• If the PR modifies a component or page that can be accessed by a direct deeplink, I verified that the code functions as expected when the deeplink is used - from a logged in and logged out account.
• If the PR modifies the UI (e.g. new buttons, new UI components, changing the padding/spacing/sizing, moving components, etc) or modifies the form input styles:
  • I verified that all the inputs inside a form are aligned with each other.
  • I added Design label and/or tagged @Expensify/design so the design team can review the changes.
• For any bug fix or new feature in this PR, I verified that sufficient unit tests are included to prevent regressions in this flow.
• If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.
• I have checked off every checkbox in the PR reviewer checklist, including those that don't apply to this PR.

Screenshots/Videos

Android: HybridApp

Android: mWeb Chrome

iOS: HybridApp

iOS: mWeb Safari

MacOS: Chrome / Safari

[bernhardoj]

@mountiny Completely forgot about the checklist. Added now.

[mountiny]

Thank you

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