getCharsets example

$this->assertEquals('en', $request->getLocale());
        $this->assertEquals('en', \Locale::getDefault());

        $request->setDefaultLocale('de');
        $this->assertEquals('en', $request->getLocale());
        $this->assertEquals('en', \Locale::getDefault());
    }

    public function testGetCharsets()
    {
        $request = new Request();
        $this->assertEquals([], $request->getCharsets());
        $request->headers->set('Accept-Charset', 'ISO-8859-1, US-ASCII, UTF-8; q=0.8, ISO-10646-UCS-2; q=0.6');
        $this->assertEquals([], $request->getCharsets()); // testing caching
        $request = new Request();
        $request->headers->set('Accept-Charset', 'ISO-8859-1, US-ASCII, UTF-8; q=0.8, ISO-10646-UCS-2; q=0.6');
        $this->assertEquals(['ISO-8859-1', 'US-ASCII', 'UTF-8', 'ISO-10646-UCS-2'], $request->getCharsets());

        $request = new Request();
        $request->headers->set('Accept-Charset', 'ISO-8859-1,utf-8;q=0.7,*;q=0.7');
        $this->assertEquals(['ISO-8859-1', 'utf-8', '*'], $request->getCharsets());
    }