test: add swaps trending e2e tests

[bfullam]

Description

Adds minimal SmokeTrade E2E coverage for Bridge Swap Trending Tokens zero-state behavior as a follow-up to the feature PR to keep implementation and test review separated.

Scope is intentionally narrow:

• Verifies zero-state trending section visibility and filter interaction flow.
• Verifies row navigation behavior from trending list.
• Uses existing smoke framework/page-object patterns.

Changelog

CHANGELOG entry: null

Related issues

Fixes: Follow-up coverage for #26620 (SWAPS-4038)

Manual testing steps

Feature: Swap trending tokens smoke coverage

  Scenario: user validates bridge zero-state trending interactions
    Given the app is running with swap trending tokens enabled
    And the user is on the Swap screen in Bridge zero state

    When the user opens and applies trending filters
    Then the trending list reflects the selected filters

    When the user taps a trending token row
    Then the user is navigated to that token's asset details

Screenshots/Recordings

Before

N/A (test-only follow-up PR)

After

N/A (test-only follow-up PR)

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I've included tests if applicable
• I've documented my code using JSDoc format if applicable
• I've applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

---

Note

Low Risk
Primarily adds/adjusts test code and refactors testID constants; production behavior is unchanged aside from testID wiring, so risk is low and limited to potential selector breakage in tests.

Overview
Adds a new SmokeTrade Detox spec validating Bridge zero-state trending tokens behavior end-to-end: feature-flagged enablement, filter bottom sheets (price/time/network), token-row navigation to asset details, and trending section hiding once a quote amount is entered.

Refactors trending token testIDs out of BridgeViewSelectorsIDs into a dedicated BridgeTrendingTokensSectionTestIds module, updates BridgeTrendingTokensSection and related unit tests/mocks accordingly, and introduces a SwapTrendingTokensView page object to drive the new E2E flow.

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[github-actions]

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[christopherferreira9]

LGTM

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[github-actions]

🔍 Smart E2E Test Selection

• Selected E2E tags: SmokeTrade, SmokeConfirmations
• Selected Performance tags: None (no tests recommended)
• Risk Level: medium
• AI Confidence: 90%

click to see 🤖 AI reasoning details

E2E Test Selection:
This PR introduces a new E2E test for swap trending tokens functionality and refactors test IDs for the BridgeTrendingTokensSection component.

Key changes:

1. New E2E test: tests/smoke/swap/swap-trending-tokens.spec.ts - explicitly tagged with SmokeTrade, tests the trending tokens feature in the swap/bridge zero-state view
2. New page object: tests/page-objects/swaps/SwapTrendingTokensView.ts - provides test utilities for interacting with trending tokens UI
3. Test ID refactoring: Moved trending-related test IDs from BridgeView.testIds.ts to a new dedicated file BridgeTrendingTokensSectionTestIds.ts
4. Unit test updates: Updated BridgeView.test.tsx and BridgeTrendingTokensSection.test.tsx to use the new test ID imports

The component logic in BridgeTrendingTokensSection.tsx is unchanged - only the import path for test IDs was modified.

Selected tags:

• SmokeTrade: The new test is explicitly tagged with SmokeTrade and tests swap/bridge trending tokens functionality. This is the primary tag needed to validate the new E2E test works correctly.
• SmokeConfirmations: Per the tag guidance, when selecting SmokeTrade for swap/bridge flows, SmokeConfirmations should also be selected as transaction confirmations are part of the flow.

This is medium risk because it adds new E2E test infrastructure that needs validation, but the actual app functionality remains unchanged.

Performance Test Selection:
No performance tests are needed for this PR. The changes are focused on E2E test infrastructure (new test file, page object, test ID refactoring) with no functional changes to the app code that would impact performance. The BridgeTrendingTokensSection component logic is unchanged - only test ID imports were modified. There are no changes to UI rendering, data loading, state management, or critical user flows that would warrant performance testing.

View GitHub Actions results

[github-actions]

⚠️ E2E Fixture Validation — Structural changes detected

Category	Count
New keys	68
Missing keys	11
Type mismatches	0
Value mismatches	7 (informational)

The committed fixture schema is out of date. To update, comment:

@metamaskbot update-mobile-fixture

View full details | Download diff report

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.54%. Comparing base (43e62f8) to head (ffebb00).
⚠️ Report is 34 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #27118      +/-   ##
==========================================
+ Coverage   81.52%   81.54%   +0.01%     
==========================================
  Files        4626     4638      +12     
  Lines      121238   121448     +210     
  Branches    26642    26690      +48     
==========================================
+ Hits        98845    99032     +187     
- Misses      15446    15461      +15     
- Partials     6947     6955       +8     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[christopherferreira9]

LGTM