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Testing LocaleStore Internationalization Workflow in learnGitBranching

This test suite validates the LocaleStore functionality in the learnGitBranching application, focusing on locale management and internationalization features. The tests ensure proper handling of locale changes through different mechanisms including direct changes, header-based changes, and language-based modifications.

Test Coverage Overview

The test suite provides comprehensive coverage of the LocaleStore’s core functionality.

Key areas tested include:

Default locale initialization and retrieval
Direct locale changes via actions
Header-based locale changes
Language-based locale mapping

Edge cases are covered through iterative testing of all available locale mappings.

Implementation Analysis

The testing approach utilizes Jest’s describe/it pattern for organizing test cases. The implementation demonstrates clean separation between the LocaleStore and LocaleActions, following proper flux architecture patterns.

The tests leverage Jest’s expect assertions and handle asynchronous state changes effectively.

Technical Details

Testing tools and configuration:

Jest as the primary testing framework
LocaleActions for state modifications
LocaleStore for state management
Flux architecture patterns
Header and language mapping validation

Best Practices Demonstrated

The test suite exemplifies several testing best practices including isolated test cases, clear test descriptions, and comprehensive state validation.

Notable practices include:

Systematic testing of all locale mappings
Proper setup and initialization verification
Clear separation of concerns between actions and store
Consistent assertion patterns

pcottle/learngitbranching

__tests__/LocaleStore.spec.js

            
var LocaleActions = require('../src/js/actions/LocaleActions');
var LocaleStore = require('../src/js/stores/LocaleStore');

describe('LocaleStore', function() {

  it('has default locale', function() {
    expect(LocaleStore.getLocale())
      .toEqual(LocaleStore.getDefaultLocale());
  });

  it('changes locales', function() {
    expect(LocaleStore.getLocale()).toEqual('en_US');
    LocaleActions.changeLocale('ja_JP');
    expect(LocaleStore.getLocale()).toEqual('ja_JP');
  });

  it('changes locales from headers', function() {
    var headerLocaleMap = LocaleStore.getHeaderLocaleMap();
    Object.keys(headerLocaleMap).forEach(function(header) {
      LocaleActions.changeLocaleFromHeader(header);
      expect(LocaleStore.getLocale()).toEqual(
        headerLocaleMap[header]
      );
    });
  });

  it('changes locales from languages', function() {
    var langLocaleMap = LocaleStore.getLangLocaleMap();
    Object.keys(langLocaleMap).forEach(function(lang) {
      LocaleActions.changeLocaleFromHeader(lang);
      expect(LocaleStore.getLocale()).toEqual(
        langLocaleMap[lang]
      );
    });
  });
});