/**
* Returns the "best match" of the given $priorities. Will return null in case
* no match could be identified or a string containing the best matching Accept
* header.
*
* @param MessageInterface $request
* @param array $priorities A set of priorities.
* @return null|string
*/
public function getBestMatch(MessageInterface $request, array $priorities = array())
{
if (!$request->hasHeader('Accept')) {
return null;
}
$header = $this->negotiator->getBest(implode(',', $request->getHeader('Accept')), $priorities);
if ($header instanceof AcceptHeader) {
return $header->getValue();
}
return null;
}
/**
* Asserts that the given header exists.
*
* If provided with a value, the value of the header will also be compared.
*
* @param MessageInterface $message
* @param string $name
* @param string|array|null $value
*/
public function assertHasHeader(MessageInterface $message, $name, $value = null)
{
$this->assertTrue($message->hasHeader($name), "The message does not contain the header {$name}.");
if (!is_null($value)) {
$header = $message->getHeader($name);
if (count($header) === 1 && is_string($value)) {
$this->assertEquals($value, array_shift($header), "The message contains the header {$name}, but with the wrong value.");
} else {
$this->assertEquals($value, $header, "The message contains the header {$name}, but with the wrong value.");
}
}
}
/**
* {@inheritdoc}
*/
public function getHeader($header)
{
return $this->message->getHeader($header);
}
public function testGetHeaderReturnsAnEmptyArrayWhenHeaderDoesNotExist()
{
$this->assertSame([], $this->message->getHeader('X-Foo-Bar'));
}
public function get($header)
{
return $this->request->getHeader($header)[0];
}