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import { getCachedFormatter } from '../src/get-cached-formatter';
describe( 'getFormatter', () => {
it( 'should return a cached formatter when one exists', () => {
const locale = 'en-US';
const options: Intl.NumberFormatOptions = { style: 'currency', currency: 'USD' };
// Get formatter for the first time
const formatter1 = getCachedFormatter( { locale, options } );
// Get formatter for the second time
const formatter2 = getCachedFormatter( { locale, options } );
// Check that the same formatter instance is returned
expect( formatter1 ).toBe( formatter2 );
// Check that the formatter formats correctly
expect( formatter1.format( 1234.56 ) ).toBe( '$1,234.56' );
} );
it( 'should create a new formatter when options are different', () => {
const locale = 'en-US';
const options1: Intl.NumberFormatOptions = { style: 'currency', currency: 'USD' };
const options2: Intl.NumberFormatOptions = { style: 'currency', currency: 'EUR' };
// Get formatter for the first set of options
const formatter1 = getCachedFormatter( { locale, options: options1 } );
// Get formatter for the second set of options
const formatter2 = getCachedFormatter( { locale, options: options2 } );
// Check that different formatter instances are returned
expect( formatter1 ).not.toBe( formatter2 );
// Check that the formatters format correctly
expect( formatter1.format( 1234.56 ) ).toBe( '$1,234.56' );
expect( formatter2.format( 1234.56 ) ).toBe( '€1,234.56' );
} );
} );
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