public function testLoadFunction()
{
$this->versionA->addFunction($fooA = new GlobalFunction('foo'));
$this->versionB->addFunction($fooB = new GlobalFunction('foo'));
$this->em->persist($this->package);
$this->em->flush();
$loadedFunc = $this->provider->loadFunction('foo');
$this->assertSame($fooA, $loadedFunc, 'loadFunction() takes the first function if no package versions are set.');
$loadedFunc = $this->provider->loadFunction('FoO');
$this->assertSame($fooA, $loadedFunc, 'loadFunction() treats the name as case-insensitive.');
$this->provider->setPackageVersions(array($this->versionB));
$loadedFunc = $this->provider->loadFunction('Foo');
$this->assertSame($fooB, $loadedFunc, 'loadFunction() takes the function from one of the set packages.');
$this->provider->setPackageVersions(array($this->versionC));
$this->assertNull($this->provider->loadFunction('Foo'), 'loadFunction() returns null if function is not found in set packages.');
$this->assertNull($this->provider->loadFunction('Bar'), 'loadFunction() returns null if function does not exist.');
}
