84 lines
2.6 KiB
C#
84 lines
2.6 KiB
C#
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using System;
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using NUnit.Framework;
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using NUnit.Framework.Constraints;
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using UnityEngine.Profiling;
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namespace UnityEngine.TestTools.Constraints
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{
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public class AllocatingGCMemoryConstraint : Constraint
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{
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private class AllocatingGCMemoryResult : ConstraintResult
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{
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private readonly int diff;
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public AllocatingGCMemoryResult(IConstraint constraint, object actualValue, int diff) : base(constraint, actualValue, diff > 0)
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{
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this.diff = diff;
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}
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public override void WriteMessageTo(MessageWriter writer)
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{
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if (diff == 0)
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writer.WriteMessageLine("The provided delegate did not make any GC allocations.");
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else
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writer.WriteMessageLine("The provided delegate made {0} GC allocation(s).", diff);
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}
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}
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private ConstraintResult ApplyTo(Action action, object original)
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{
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var recorder = Recorder.Get("GC.Alloc");
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// The recorder was created enabled, which means it captured the creation of the Recorder object itself, etc.
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// Disabling it flushes its data, so that we can retrieve the sample block count and have it correctly account
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// for these initial allocations.
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recorder.enabled = false;
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#if !UNITY_WEBGL
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recorder.FilterToCurrentThread();
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#endif
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recorder.enabled = true;
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try
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{
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action();
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}
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finally
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{
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recorder.enabled = false;
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#if !UNITY_WEBGL
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recorder.CollectFromAllThreads();
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#endif
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}
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return new AllocatingGCMemoryResult(this, original, recorder.sampleBlockCount);
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}
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public override ConstraintResult ApplyTo(object obj)
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{
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if (obj == null)
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throw new ArgumentNullException();
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TestDelegate d = obj as TestDelegate;
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if (d == null)
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throw new ArgumentException(string.Format("The actual value must be a TestDelegate but was {0}",
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obj.GetType()));
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return ApplyTo(() => d.Invoke(), obj);
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}
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public override ConstraintResult ApplyTo<TActual>(ActualValueDelegate<TActual> del)
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{
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if (del == null)
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throw new ArgumentNullException();
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return ApplyTo(() => del.Invoke(), del);
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}
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public override string Description
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{
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get { return "allocates GC memory"; }
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}
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}
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}
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