Metabor\Callback\SymfonyExpressionTest::testExpressionIsUsedAsStringRepresentationOfTheInstance PHP Method

    public function testExpressionIsUsedAsStringRepresentationOfTheInstance()
    {
        $expression = '2 * 3';
        $callback = new SymfonyExpression($expression);
        $this->assertEquals($expression, (string) $callback);
    }