v8/test/intl/number-format/parse-currency.js

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// Currency parsing is not yet supported. We need ICU49 or higher to get
// it working.

// Flags: --intl-extra

var nf = new Intl.NumberFormat(['en'], {style: 'currency', currency: 'USD'});

assertEquals(undefined, nf.v8Parse('USD 123.43'));