Skip to content

Instantly share code, notes, and snippets.

Last active February 28, 2021 08:09
What would you like to do?
Distributed Lock TestsDistributed Lock Tests
using System.Linq;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;
using Xunit;
using Xunit.Abstractions;
namespace PostgreSQLDistributedLock.Tests
public class DistributedLockTests
private readonly ITestOutputHelper _testOutputHelper;
private readonly string _connectionString;
public DistributedLockTests(ITestOutputHelper testOutputHelper)
_testOutputHelper = testOutputHelper;
_connectionString = "Host=localhost;Username=dbUser;Password='password';Database=distributed-lock-db;";
public void DistributedLockIsAcquiredSuccessfully()
async Task ExclusiveLockTask(int node)
_testOutputHelper.WriteLine($"Executing a long running task on Node {node}");
// Add 5 second delay
await Task.Delay(5000);
const long lockId = 50000;
// Simulate with 5 nodes
var nodes = Enumerable.Range(1, 5).ToList();
Parallel.ForEach(nodes, async node =>
// Act and Arrange
_testOutputHelper.WriteLine($"Trying to acquire session lock and run task for Node {node}");
using var distributedLock = new DistributedLock(_connectionString, NullLogger<DistributedLock>.Instance);
if (!await distributedLock.TryExecuteInDistributedLock(lockId, () => ExclusiveLockTask(node)))
_testOutputHelper.WriteLine($"Node {node} could not acquire lock");
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment