[13.x] Allow options with formatAmount (#1348)

* Allow options with formatAmount

* wip

src/Cashier.php

@@ -135,19 +135,25 @@ public static function formatCurrencyUsing(callable $callback)
      * @param  int  $amount
      * @param  string|null  $currency
      * @param  string|null  $locale
+     * @param  array  $options
      * @return string
      */
-    public static function formatAmount($amount, $currency = null, $locale = null)
+    public static function formatAmount($amount, $currency = null, $locale = null, array $options = [])
     {
         if (static::$formatCurrencyUsing) {
-            return call_user_func(static::$formatCurrencyUsing, $amount, $currency, $locale);
+            return call_user_func(static::$formatCurrencyUsing, $amount, $currency, $locale, $options);
         }
 
         $money = new Money($amount, new Currency(strtoupper($currency ?? config('cashier.currency'))));
 
         $locale = $locale ?? config('cashier.currency_locale');
 
         $numberFormatter = new NumberFormatter($locale, NumberFormatter::CURRENCY);
+
+        if (isset($options['min_fraction_digits'])) {
+            $numberFormatter->setAttribute(NumberFormatter::MIN_FRACTION_DIGITS, $options['min_fraction_digits']);
+        }
+
         $moneyFormatter = new IntlMoneyFormatter($numberFormatter, new ISOCurrencies());
 
         return $moneyFormatter->format($money);

tests/Unit/CashierTest.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Laravel\Cashier\Tests\Unit;
+
+use Laravel\Cashier\Cashier;
+use Laravel\Cashier\Tests\TestCase;
+
+class CashierTest extends TestCase
+{
+    public function test_it_can_format_an_amount()
+    {
+        $this->assertSame('$10.00', Cashier::formatAmount(1000));
+    }
+
+    public function test_it_can_format_an_amount_without_digits()
+    {
+        $this->assertSame('$10', Cashier::formatAmount(1000, null, null, ['min_fraction_digits' => 0]));
+    }
+}