The unit tests for AllocatingGCMemory

TestDictionary.cs

using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
using NUnit.Framework;
using UnityEngine.Profiling;
using UnityEngine.TestTools.Constraints;

using Is = UnityEngine.TestTools.Constraints.Is;

namespace MH.GCTests
{
    public class DummyTest
    {
        [Test]
        public void DictTest_FAIL()
        {
            const int ELEM_COUNT = 1000;

            var cont = new Dictionary<string, int>();
            for (int i = 0; i < ELEM_COUNT; ++i)
                cont.Add(i.ToString(), i);

            Assert.That(() =>
                {
                    for (var ie = cont.GetEnumerator(); ie.MoveNext();) { }
                },
                Is.Not.AllocatingGCMemory()
            );

            Assert.That(() =>
                {
                    foreach (var elem in cont) { }
                },
                Is.Not.AllocatingGCMemory()
            );
        }

        [Test]
        public void DictTest_PASS()
        {
            const int ELEM_COUNT = 1000;

            var cont = new Dictionary<string, int>();
            for (int i = 0; i < ELEM_COUNT; ++i)
                cont.Add(i.ToString(), i);

            Assert.That(() =>
                {
                    for (var ie = cont.GetEnumerator(); ie.MoveNext();) { }
                },
                Is.Not.AllocatingGCMemory()
            );

            Assert.That(() =>
                {
                    foreach (var elem in cont) { }
                },
                Is.Not.AllocatingGCMemory()
            );

            Debug.Log(string.Format("startMem = {0}, mem1 = {1}, mem2 = {2}", 1, 2, 3)); //<-- the only differenct of the two tests 
        }
    }
}

The only differences between these two tests, is that the second one has a Debug.Log at the end of the method, which caused the Assertions to give different results.