silverstripe-framework/tests/php/ORM/DBCurrencyTest.php

<?php

namespace SilverStripe\ORM\Tests;

use SilverStripe\Forms\CurrencyField;
use SilverStripe\ORM\FieldType\DBCurrency;
use SilverStripe\Dev\SapphireTest;

class DBCurrencyTest extends SapphireTest
{
    public function testNiceFormatting()
    {
        // Test a bunch of different data values and results in Nice() and Whole()
        $tests = array(
            // Test basic operation
            '$50.00' => array('$50.00', '$50'),

            // Test removal of junk text
            'this is -50.29 dollars' => array('($50.29)', '($50)'),
            'this is -50.79 dollars' => array('($50.79)', '($51)'),
            'this is 50.79 dollars' => array('$50.79', '$51'),

            // Test negative numbers
            '-1000' => array('($1,000.00)','($1,000)'),
            '-$2,000' => array('($2,000.00)', '($2,000)'),

            // Test thousands comma
            '5000' => array('$5,000.00', '$5,000'),

            // Test scientific notation
            '5.68434188608E-14' => array('$0.00', '$0'),
            '5.68434188608E7' => array('$56,843,418.86', '$56,843,419'),
            "Sometimes Es are still bad: 51 dollars, even though they\'re used in scientific notation"
                => array('$51.00', '$51'),
            "What about 5.68434188608E7 in the middle of a string" => array('$56,843,418.86', '$56,843,419'),
        );

        foreach ($tests as $value => $niceValues) {
            $c = new DBCurrency('MyField');
            $c->setValue($value);
            $this->assertEquals($niceValues[0], $c->Nice());
            $this->assertEquals($niceValues[1], $c->Whole());
        }
    }

    public function testScaffoldedField()
    {
        // Test DBCurrency scaffolds a CurrencyField
        $currencyDbField = DBCurrency::create('Currency');
        $scaffoldedField = $currencyDbField->scaffoldFormField();

        $this->assertInstanceOf(CurrencyField::class, $scaffoldedField);
    }
}