Symfony\Component\DomCrawler\Tests\FormTest::testGetSetValue PHP Method

    public function testGetSetValue()
    {
        $form = $this->createForm('<form><input type="text" name="foo" value="foo" /><input type="submit" /></form>');

        $this->assertEquals('foo', $form['foo']->getValue(), '->offsetGet() returns the value of a form field');

        $form['foo'] = 'bar';

        $this->assertEquals('bar', $form['foo']->getValue(), '->offsetSet() changes the value of a form field');

        try {
            $form['foobar'] = 'bar';
            $this->fail('->offsetSet() throws an \InvalidArgumentException exception if the field does not exist');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true, '->offsetSet() throws an \InvalidArgumentException exception if the field does not exist');
        }

        try {
            $form['foobar'];
            $this->fail('->offsetSet() throws an \InvalidArgumentException exception if the field does not exist');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true, '->offsetSet() throws an \InvalidArgumentException exception if the field does not exist');
        }
    }