public void AccessorDuplicationCreationAccessPerformance()
{
var sw = new Stopwatch();
var elapsed = new List <long>();
long firstElapse;
sw.Start();
var firstCreation = DynamicPropertyAccessorFactory.Create(typeof(TestObject), nameof(TestObject.SomeInt));
sw.Stop();
firstElapse = sw.ElapsedTicks;
Debug.WriteLine($"creation time 1 : ms: {sw.ElapsedMilliseconds} ticks: {sw.ElapsedTicks}");
for (int i = 0; i < 1000; i++)
{
sw.Restart();
var accCreation2 = DynamicPropertyAccessorFactory.Create(typeof(TestObject), nameof(TestObject.SomeInt));
sw.Stop();
elapsed.Add(sw.ElapsedTicks);
}
var averageCachedTime = new TimeSpan((long)elapsed.Average());
Debug.WriteLine($"creation time 2 : ms: {averageCachedTime.TotalMilliseconds} ticks: {averageCachedTime.Ticks}");
var expectedImprovement = 5000;
var dividend = averageCachedTime.Ticks > 0 ? averageCachedTime.Ticks : 1;
double fraction = (firstElapse / dividend);
Assert.GreaterOrEqual(fraction, expectedImprovement, string.Format($"Performance should be >{{0}} times faster for an accessor which already exists but it is only {fraction}.", expectedImprovement));
}
public void GetSetDateTime()
{
var testInstance = new TestObject();
var accessorDateTimeVal = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.DateTimeVal);
Assert.That((DateTime?)accessorDateTimeVal.Get(testInstance), Is.EqualTo(default(DateTime?)));
var setValuesDate = DateTime.Now;
accessorDateTimeVal.Set(testInstance, setValuesDate);
Assert.That((DateTime?)accessorDateTimeVal.Get(testInstance), Is.EqualTo(setValuesDate));
}
public void GetSetString()
{
var testInstance = new TestObject();
var accessorContent = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.Content);
Assert.That((string)accessorContent.Get(testInstance), Is.EqualTo(default(string)));
var setValuesString = "hi";
accessorContent.Set(testInstance, setValuesString);
Assert.That((string)accessorContent.Get(testInstance), Is.EqualTo(setValuesString));
}
public void GetSetEnum()
{
var testInstance = new TestObject();
var accessorSomeInt = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.SomeEnum);
Assert.That((TestEnum)accessorSomeInt.Get(testInstance), Is.EqualTo(default(TestEnum)));
var setValuesInt = TestEnum.ValB;
accessorSomeInt.Set(testInstance, setValuesInt);
Assert.That((TestEnum)accessorSomeInt.Get(testInstance), Is.EqualTo(setValuesInt));
}
public void GetSetPropertyInfo()
{
var testInstance = new TestObject();
var accessorRandomPropertyInfo = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.RandomPropertyInfo);
Assert.That((PropertyInfo)accessorRandomPropertyInfo.Get(testInstance), Is.EqualTo(default(PropertyInfo)));
var varSetValuePropertyInfo = typeof(TestObject).GetProperty("ErrorMethod");
accessorRandomPropertyInfo.Set(testInstance, varSetValuePropertyInfo);
Assert.That((PropertyInfo)accessorRandomPropertyInfo.Get(testInstance), Is.EqualTo(varSetValuePropertyInfo));
}
public void GetSetObject()
{
var testInstance = new TestObject();
var accessorSomeBoxedObject = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.SomeBoxedObject);
Assert.That((object)accessorSomeBoxedObject.Get(testInstance), Is.EqualTo(default(object)));
var setValuesBoxedObject = (object)500;
accessorSomeBoxedObject.Set(testInstance, setValuesBoxedObject);
Assert.That(accessorSomeBoxedObject.Get(testInstance), Is.EqualTo(setValuesBoxedObject));
}
public void TestSetterCalls()
{
var instance = new TestObject();
var stream = new MemoryStream();
var accessor = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.SomeBoxedObject);
accessor.Set(instance, 1);
accessor.Set(instance, "");
accessor.Set(instance, null);
accessor.Set(instance, (DateTime?)null);
accessor.Set(instance, new object());
accessor.Set(instance, default(int));
accessor.Set(instance, default(short));
accessor.Set(instance, default(short?));
accessor.Set(instance, default(double));
accessor.Set(instance, default(double?));
accessor.Set(instance, default(MemoryStream));
accessor.Set(instance, stream);
stream.Dispose();
}
public void GetSetMethodThrow()
{
Assert.Throws <NotSupportedException>(() => DynamicPropertyAccessorFactory.Create <TestObject>(d => d.ErrorMethod()));
}
public void PerformanceTest()
{
var iterations = 1_000_000;
var testObjects = Enumerable.Range(0, iterations).Select(i => new TestObject()).ToList();
TimeSpan reflectionTimeSpan;
TimeSpan dynPropertyAccessorTimeSpan;
TimeSpan clrAccessorTimespan;
var prop = typeof(TestObject).GetProperty("SomeInt");
using (var measurement = Measure("Retrieval of Clr Accessors"))
{
for (int i = 0; i < iterations; i++)
{
var subject = testObjects[i];
subject.SomeInt = 1;
subject.Content = "Hi";
subject.SomeBoxedObject = 500;
subject.DateTimeVal = DateTime.Now;
subject.RandomPropertyInfo = prop;
var t1 = subject.SomeInt;
var t2 = subject.Content;
var t3 = subject.SomeBoxedObject;
var t4 = subject.DateTimeVal;
var t5 = subject.RandomPropertyInfo;
}
clrAccessorTimespan = measurement.Elapsed;
}
var accessorSomeInt = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.SomeInt);
var accessorContent = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.Content);
var accessorSomeBoxedObject = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.SomeBoxedObject);
var accessorDateTimeVal = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.DateTimeVal);
var accessorRandomPropertyInfo = DynamicPropertyAccessorFactory.Create <TestObject>(d => d.RandomPropertyInfo);
using (var measurement = Measure("Retrieval of DynamicPropertyAccessors"))
{
for (int i = 0; i < iterations; i++)
{
var subject = testObjects[i];
accessorSomeInt.Set(subject, 1);
accessorContent.Set(subject, "Hi");
accessorSomeBoxedObject.Set(subject, 500);
accessorDateTimeVal.Set(subject, DateTime.Now);
accessorRandomPropertyInfo.Set(subject, prop);
accessorSomeInt.Get(subject);
accessorContent.Get(subject);
accessorSomeBoxedObject.Get(subject);
accessorDateTimeVal.Get(subject);
accessorRandomPropertyInfo.Get(subject);
}
dynPropertyAccessorTimeSpan = measurement.Elapsed;
}
var pInt = typeof(TestObject).GetProperty("SomeInt");
var pContent = typeof(TestObject).GetProperty("Content");
var pSomeBoxedObject = typeof(TestObject).GetProperty("SomeBoxedObject");
var pRandomPropertyInfo = typeof(TestObject).GetProperty("RandomPropertyInfo");
var pDateTimeVal = typeof(TestObject).GetProperty("DateTimeVal");
using (var measurement = Measure("Retrieval of reflection properties"))
{
for (int i = 0; i < iterations; i++)
{
var subject = testObjects[i];
pInt.SetValue(subject, 1);
pContent.SetValue(subject, "hi");
pSomeBoxedObject.SetValue(subject, 500);
pDateTimeVal.SetValue(subject, DateTime.Now);
pRandomPropertyInfo.SetValue(subject, prop);
pInt.GetValue(subject);
pContent.GetValue(subject);
pSomeBoxedObject.GetValue(subject);
pDateTimeVal.GetValue(subject);
pRandomPropertyInfo.GetValue(subject);
}
reflectionTimeSpan = measurement.Elapsed;
}
Console.WriteLine($"clrAccessorTimespan: {clrAccessorTimespan.TotalMilliseconds} ms");
Console.WriteLine($"reflection: {reflectionTimeSpan.TotalMilliseconds} ms");
Console.WriteLine($"dynPropertyAccessorTimeSpan: {dynPropertyAccessorTimeSpan.TotalMilliseconds} ms");
Assert.GreaterOrEqual(reflectionTimeSpan.TotalMilliseconds, dynPropertyAccessorTimeSpan.TotalMilliseconds);
Assert.GreaterOrEqual(dynPropertyAccessorTimeSpan.TotalMilliseconds, clrAccessorTimespan.TotalMilliseconds);
}
