Fix: Force current currency reload on currency code change

[satishashilwar]

Description (*)

Fixed an issue where calling setCurrentCurrencyCode() multiple times did not update the currency returned by getCurrentCurrency() due to internal caching.

Root Cause:
getCurrentCurrency() caches the currency object using the 'current_currency' key. When setCurrentCurrencyCode() changed the currency code, it didn't clear this cache, causing getCurrentCurrency() to return stale data.

Solution:
Added unsetData('current_currency') in setCurrentCurrencyCode() to clear the cached currency when the currency code changes, forcing getCurrentCurrency() to reload the currency based on the new code.

Changes:

• Updated Store::setCurrentCurrencyCode() to clear cached currency
• Added unit test testSetCurrentCurrencyCodeClearsCachedCurrency()

Related Pull Requests

None

Fixed Issues (if relevant)

1. Fixes [Issue] Force current currency reload on current currency code change #40333

Manual testing scenarios (*)

1. Create a store with multiple available currencies (USD, EUR)
2. Call $store->setCurrentCurrencyCode('USD')
3. Verify $store->getCurrentCurrency()->getCode() returns 'USD'
4. Call $store->setCurrentCurrencyCode('EUR')
5. Verify $store->getCurrentCurrency()->getCode() returns 'EUR' (without this fix, it would still return 'USD')

Questions or comments

None

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any predefined sections require an update
• All automated tests passed successfully (all builds are green)

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[satishashilwar]

@magento run all tests

[satishashilwar]

@magento run Unit Tests, Static Tests