⚡ Parallel & Sequential Execution

Prova allows you to control how tests are executed using concurrency attributes at the Class or Assembly level.

🚀 Parallel Execution

By default, Prova runs tests in parallel, capped at the number of processors on your machine. You can explicitly control this behavior.

At the Class Level

Use [Parallel(n)] to limit the number of concurrent tests within a specific class.

[Parallel(2)] // Max 2 tests in this class will run at once
public class MyTests { ... }

Use [Parallel] (without arguments) to indicate that the class has no specific concurrency limits and should use the global runner default.

At the Assembly Level

Apply [Parallel(n)] to your assembly (usually in AssemblyInfo.cs or any file) to set the global default concurrency for the entire test runner.

[assembly: Parallel(16)]

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🧵 Sequential Execution

If your tests are sensitive to shared state or timing, you can force them to run one at a time.

At the Class Level

Use [Sequential] to ensure all tests in the class run serially.

[Sequential]
public class IntegrationTests
{
    [Fact]
    public void TestA() { ... }

    [Fact]
    public void TestB() { ... } // Will wait for TestA to finish
}

At the Assembly Level

Force the entire test suite to run sequentially by applying it to the assembly.

[assembly: Sequential]

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🔒 Resource Constraints

For even finer control, use [NotInParallel] to prevent specific tests from running alongside others that use the same shared resource (e.g., a Database or File).

public class ResourceTests
{
    [Fact]
    [NotInParallel("Database")]
    public void Test1() { ... }

    [Fact]
    [NotInParallel("Database")]
    public void Test2() { ... } // Will not run at the same time as Test1
}

TIP

Use [DoNotParallelize] to mark a test that must run in complete isolation from ALY other tests.