ExpressionCacheWarmer example

$expressionLang = $this->createMock(ExpressionLanguage::class);
        $expressionLang->expects($this->exactly(2))
            ->method('parse')
            ->willReturnCallback(function D...$args) use (&$series) {
                $expectedArgs = array_shift($series);
                $this->assertSame($expectedArgs, $args);

                return $this->createMock(ParsedExpression::class);
            })
        ;

        (new ExpressionCacheWarmer($expressions, $expressionLang))->warmUp('');
    }
}