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Fix S1104 FP: Do not report in Unity serializable classes #9514

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merged 3 commits into from
Jul 11, 2024
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Fix S1104 FP: Do not report in Unity serializable classes #9514

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a94a3ae
CaYC commit
sebastien-marichal Jul 9, 2024
0825155
Fix S1104 FP: Do not report in Unity serializable classes
sebastien-marichal Jul 9, 2024
350fd89
Add tests for Unity custom serializable class
sebastien-marichal Jul 11, 2024
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8 changes: 7 additions & 1 deletion analyzers/src/SonarAnalyzer.CSharp/Rules/FieldsShouldBeEncapsulatedInProperties.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,10 @@ public sealed class FieldsShouldBeEncapsulatedInProperties : SonarDiagnosticAnal
SyntaxKind.ConstKeyword
};

private static readonly ImmutableArray<KnownType> IgnoredTypes = ImmutableArray.Create(
KnownType.UnityEngine_MonoBehaviour,
KnownType.UnityEngine_ScriptableObject);
Comment on lines +41 to +42
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My understanding from the docs is that you should include UnityEngine.Object.
Which, if I'm not wrong, is parent to UnityEngine_ScriptableObject so you can replace one with the other.

But for custom classes which don’t derive from UnityEngine.Object, Unity includes the state of the instance directly in the serialized data of the MonoBehaviour or ScriptableObject that references them. There are two ways that this can happen: inline and by [SerializeReference]
.```

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Adding UnityEngine.Object is not enough, the class should also have the Serializable attribute.
I can add it so it also supports custom serializable unity class/object.
I will rework a bit the logic then.

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@sebastien-marichal sebastien-marichal Jul 11, 2024 •
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After a closer look, the required attribute for custom objects is System.Serializable, and this is already an exception to the rule.

Edit 1: Never mind, I didn't realize we were only checking if the field had the attribute. I have pushed my updates.

Edit 2: I am having strokes, we do check if the parent class has the Serializable field. In any case, I have added more UTs to check for custom Unity serializable classes.


public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get; } = ImmutableArray.Create(Rule);

protected override void Initialize(SonarAnalysisContext context) =>
Expand All @@ -52,7 +56,9 @@ protected override void Initialize(SonarAnalysisContext context) =>
var firstVariable = fieldDeclaration.Declaration.Variables[0];
var symbol = c.SemanticModel.GetDeclaredSymbol(firstVariable);
var parentSymbol = c.SemanticModel.GetDeclaredSymbol(fieldDeclaration.Parent);
if (parentSymbol.HasAttribute(KnownType.System_Runtime_InteropServices_StructLayoutAttribute) || Serializable(symbol, parentSymbol))
if (symbol.ContainingType.DerivesFromAny(IgnoredTypes)
|| parentSymbol.HasAttribute(KnownType.System_Runtime_InteropServices_StructLayoutAttribute)
|| Serializable(symbol, parentSymbol))
{
return;
}
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7 changes: 7 additions & 0 deletions analyzers/tests/SonarAnalyzer.Test/Rules/FieldsShouldBeEncapsulatedInPropertiesTest.cs
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Expand Up @@ -31,6 +31,13 @@ public class FieldsShouldBeEncapsulatedInPropertiesTest
public void FieldsShouldBeEncapsulatedInProperties() =>
builder.AddPaths("FieldsShouldBeEncapsulatedInProperties.cs").Verify();

[TestMethod]
public void FieldsShouldBeEncapsulatedInProperties_Unity3D_Ignored() =>
builder.AddPaths("FieldsShouldBeEncapsulatedInProperties.Unity3D.cs")
// Concurrent analysis puts fake Unity3D class into the Concurrent namespace
.WithConcurrentAnalysis(false)
.VerifyNoIssues();

#if NET

[TestMethod]
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18 changes: 18 additions & 0 deletions ...zers/tests/SonarAnalyzer.Test/TestCases/FieldsShouldBeEncapsulatedInProperties.Unity3D.cs
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@@ -0,0 +1,18 @@
// https://github.com/SonarSource/sonar-dotnet/issues/7522
public class UnityMonoBehaviour : UnityEngine.MonoBehaviour
{
public int Field1; // Compliant
}

public class UnityScriptableObject : UnityEngine.ScriptableObject
{
public int Field1; // Compliant
}

// Unity3D does not seem to be available as a nuget package and we cannot use the original classes
// Cannot run this test case in Concurrent mode because of the Concurrent namespace
namespace UnityEngine
{
public class MonoBehaviour { }
public class ScriptableObject { }
}
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