getHttpMethodParameterOverride example

$request->setMethod('POST');
        $this->assertEquals('POST', $request->getMethod(), '->getMethod() returns the method POST if no _method is defined');

        $request->setMethod('POST');
        $request->request->set('_method', 'purge');
        $this->assertEquals('POST', $request->getMethod(), '->getMethod() does not return the method from _method if defined and POST but support not enabled');

        $request = new Request();
        $request->setMethod('POST');
        $request->request->set('_method', 'purge');

        $this->assertFalse(Request::getHttpMethodParameterOverride(), 'httpMethodParameterOverride should be disabled by default');

        Request::enableHttpMethodParameterOverride();

        $this->assertTrue(Request::getHttpMethodParameterOverride(), 'httpMethodParameterOverride should be enabled now but it is not');

        $this->assertEquals('PURGE', $request->getMethod(), '->getMethod() returns the method from _method if defined and POST');
        $this->disableHttpMethodParameterOverride();

        $request = new Request();
        $request->setMethod('POST');
        $request->query->set('_method', 'purge');