FilterTest::testFloatFilter PHP Method

    public function testFloatFilter()
    {
        $filter = (new GeneralFilterContainer())->addFilter('test1', new FloatFilter())->addFilter('test2', new FloatFilter())->addFilter('test3', new FloatFilter());
        if (!$filter instanceof GeneralFilterContainer) {
            $this->fail('Type error');
        }
        $before = ['test1' => '22.7', 'test2' => null, 'test3' => M_E];
        $after = $filter($before);
        $this->assertSame(['test1' => 22.7, 'test2' => 0.0, 'test3' => M_E], $after);
        try {
            $typeError = ['test1' => '22', 'test2' => 0, 'test3' => []];
            $filter($typeError);
            $this->fail('Expected a TypeError');
        } catch (\TypeError $ex) {
        }
    }