AL0041 - AotTest must return int

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

Source: 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

[AotTest]
public void TestMethod() {  // Error: returns void
    // Test logic
}

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

Good Code

[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

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)