Testcontainers with MSTest

[jc1231]

I cannot find any articles or examples or best practices using Testcontainers with MSTest. Everything appears to be for XUnit only.

IAsyncLifetime for example doesn't seem to have an equivalent in MSTest.

Are there any examples or guides or is it generally not supported?

[HofmeisterAn]

The equivalent implementation in MSTest will utilize the [TestInitialize] and [TestCleanup] attributes (annotations). Please be aware and implement the async/await pattern properly, e.g.:

[TestClass]
public class MyTestClass
{
    private readonly PostgreSqlContainer _postgreSqlContainer = new PostgreSqlBuilder().Build();

    [TestInitialize]
    public Task TestInitialize()
    {
        return _postgreSqlContainer.StartAsync();
    }

    [TestCleanup]
    public Task TestCleanup()
    {
        return _postgreSqlContainer.DisposeAsync().AsTask();
    }
}

There is nothing special. It works the same way as you would set up any other fixture in MSTest as well.

[jc1231]

@HofmeisterAn Thanks for the info this is helpful.

The other issue I'm trying to solve is performance. I've seen many articles on using a single test container per test collection vs one for every individual test. XUnit appears to solve this with something called collection fixtures, I could not find an equivalent for MSTest.
MSTest appears to run everything in parallel even when my test container is a singleton.

Another strange thing I've noticed is even when running a single test, 7+ db containers will get spun up.

[HofmeisterAn]

This depends on your chosen test framework. For MSTest, please familiarize yourself with its test lifecycle attributes. I think this article summarizes it well.