Creates a cache backend to test.
Override this method to test a CacheBackend.
string $bin: Bin name to use for this backend instance.
Drupal\Core\Cache\CacheBackendInterface Cache backend to test.
Overrides GenericCacheBackendUnitTestBase::createCacheBackend
protected function createCacheBackend($bin) {
$chain = new BackendChain($bin);
// We need to create some various backends in the chain.
$chain
->appendBackend(new MemoryBackend('foo'))
->prependBackend(new MemoryBackend('bar'))
->appendBackend(new MemoryBackend('baz'));
return $chain;
}