Introduce react-intl auto-mock to simplify test maintenance

[lkostrowski]

Summary

Introduces a centralized Jest mock for react-intl that automatically returns defaultMessage for all internationalization functions, eliminating the need for repetitive intl setup across test files.

Changes

• Added __mocks__/react-intl.ts: Global mock that auto-returns defaultMessage for formatMessage, useIntl, and FormattedMessage components
• Updated jest.config.js: Configured to use the centralized mock
• Cleaned up 91 test files: Removed manual intl wrapper setup, mock implementations, and simplified test expectations

Benefits

• Reduced boilerplate: Removed ~543 lines of repetitive intl setup code across tests
• Easier maintenance: Changes to intl behavior now managed in one place instead of 90+ files
• Simpler tests: Tests now expect placeholder text (e.g., {name}) instead of interpolated values, making assertions clearer - this is a pitfall in some cases
• Consistent behavior: All tests use the same intl mock implementation

Example

Before:

const intl = createIntl({ locale: "en", messages: {} });
wrapper = ({ children }) => <IntlProvider {...intl}>{children}</IntlProvider>;

After:

// No setup needed - mock is applied globally

🤖 Generated with Claude Code

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1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
saleor-dashboard-storybook	Ignored	Preview		Oct 3, 2025 6:15am

[Copilot]

Pull Request Overview

This PR refactors the test setup for React Intl by creating a centralized mock configuration and removing duplicated mocks across test files. The main purpose is to simplify test maintenance by consolidating React Intl mocking in a single location.

Key changes:

• Created a global react-intl mock file to replace individual test mocks
• Updated the test utilities to export a pre-configured testIntlInstance
• Removed individual jest.mock("react-intl") calls from 50+ test files

Reviewed Changes

Copilot reviewed 81 out of 82 changed files in this pull request and generated 3 comments.

File	Description
__mocks__/react-intl.ts	New global mock for react-intl package with comprehensive function mocking
testUtils/intl.ts	Updated to export testIntlInstance instead of intlMock for consistency
Multiple test files	Removed redundant react-intl mocks and updated imports to use centralized utilities

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.06%. Comparing base (85a35c0) to head (ed9e642).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5935   +/-   ##
=======================================
  Coverage   40.06%   40.06%           
=======================================
  Files        2473     2473           
  Lines       40170    40170           
  Branches     8821     8821           
=======================================
+ Hits        16093    16095    +2     
+ Misses      24050    24048    -2     
  Partials       27       27           

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[Copilot]

Pull Request Overview

Copilot reviewed 90 out of 91 changed files in this pull request and generated 1 comment.

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