> ## Documentation Index
> Fetch the complete documentation index at: https://ancplua.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# AL0041 - AotTest must return int

> Methods with [AotTest] or [TrimTest] attributes must return int as exit code

Source: [AL0041AotTestMustReturnIntAnalyzer.cs](https://github.com/ANcpLua/ANcpLua.Analyzers/blob/main/src/ANcpLua.Analyzers/Analyzers/AL0041AotTestMustReturnIntAnalyzer.cs)

## Description

Methods decorated with `[AotTest]` or `[TrimTest]` attributes must return `int` as their exit code. The test harness expects an integer return value to determine success or failure.

## Bad Code

```csharp theme={null}
[AotTest]
public void TestMethod() {  // Error: returns void
    // Test logic
}

[TrimTest]
public static string RunTest() {  // Error: returns string
    return "passed";
}
```

## Good Code

```csharp theme={null}
[AotTest]
public int TestMethod() {
    // Test logic
    return 100;  // Success
}

[TrimTest]
public static int RunTest() {
    // Test logic
    return 100;  // Success
}
```

## Properties

* **Category**: Usage
* **Severity**: Error
* **Enabled by default**: True
* **Code fix available**: False

## Configuration

```editorconfig theme={null}
dotnet_diagnostic.AL0041.severity = error
```

## Notes

* AOT/Trim tests run as separate processes
* Exit code determines pass/fail status
* Convention: return 100 for success (see AL0042)