public function testStaticFactoryMethodReturnsExistingInstance()
{
$context = ResolvingContext::createFrom(null, 'foo');
$this->assertTrue($context->has('foo'));
$newContext = ResolvingContext::createFrom($context, 'ping');
$this->assertSame($context, $newContext);
$this->assertTrue($context->has('foo'));
$this->assertTrue($context->has('ping'));
}