public async Task TestGcReadFailure()
{
string cacheConfig = TestType.NewCache(nameof(TestGcReadFailure), true);
BasicFilesystemCache cache = (await InitializeCacheAsync(cacheConfig).SuccessAsync()) as BasicFilesystemCache;
XAssert.IsNotNull(cache, "Failed to create cache for GC tests!");
PipDefinition[] pips =
{
new PipDefinition("Pip1", pipSize: 3),
new PipDefinition("Pip2", pipSize: 4)
};
bool disconnectErrorReported = false;
// Assumes that the cache will be erroring out because of a file access error and not because of some
// other random reason.
cache.SuscribeForCacheStateDegredationFailures((failure) => { disconnectErrorReported = true; });
CacheEntries files = await BuildPipsAndGetCacheEntries(cache, "Build", pips);
// We will hold on to one of the files in the fingerprints in such a way as to fail the GC
FileInfo fileInfo = files.FingerprintFiles.Values.Last();
using (var fileStream = fileInfo.Open(FileMode.Open, FileAccess.Read, FileShare.None))
{
var failureExpected = cache.CollectUnreferencedCasItems(m_output);
XAssert.IsFalse(failureExpected.Succeeded, "Failed to stop CAS GC even when a fingerprint was not readable!");
}
// This time, we need to hold onto a session file - preventing the reading of roots
var sessionFiles = new DirectoryInfo(cache.SessionRoot).GetFiles();
using (var fileStream = sessionFiles[0].Open(FileMode.Open, FileAccess.Read, FileShare.None))
{
var failureExpected = cache.CollectUnreferencedFingerprints(m_output);
XAssert.IsFalse(failureExpected.Succeeded, "Failed to stop Fingerprint GC even when a session was not readable!");
}
// After these errors, the cache should have disconnected due to lack of access to the session file
XAssert.IsTrue(cache.IsDisconnected);
XAssert.IsTrue(disconnectErrorReported);
AssertSuccess(await cache.ShutdownAsync());
}