Neos\Flow\Tests\Unit\Http\AbstractMessageTest::setCharsetUpdatesContentTypeHeaderAndLeavesAdditionalInformationIntact PHP Method

    public function setCharsetUpdatesContentTypeHeaderAndLeavesAdditionalInformationIntact()
    {
        $message = $this->getAbstractMessageMock();
        $message->setHeader('Content-Type', 'text/plain; charSet=UTF-16; x-foo=bar');
        $message->setCharset('ISO-8859-1');
        $this->assertEquals('text/plain; charset=ISO-8859-1; x-foo=bar', $message->getHeader('Content-Type'));
    }