upgrade

vendor/ddeboer/data-import/tests/ValueConverter/DateTimeToStringValueConverterTest.php

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+<?php
+
+namespace Ddeboer\DataImport\Tests\ValueConverter;
+
+use Ddeboer\DataImport\ValueConverter\DateTimeToStringValueConverter;
+
+class DateTimeToStringValueConverterTest extends \PHPUnit_Framework_TestCase
+{
+    public function testConvertWithoutOutputFormatReturnsString()
+    {
+        $value = new \DateTime('2010-01-01 01:00:00');
+        $converter = new DateTimeToStringValueConverter;
+        $output = $converter->convert($value);
+        $this->assertEquals('2010-01-01 01:00:00', $output);
+    }
+
+    /**
+     * @expectedException \Ddeboer\DataImport\Exception\UnexpectedValueException
+     * @expectedExceptionMessage Input must be DateTime object
+     */
+    public function testInvalidInputFormatThrowsException()
+    {
+        $value = '14/10/2008 09:40:20';
+        $converter = new DateTimeToStringValueConverter;
+        $converter->convert($value);
+    }
+}