public void GetFieldSetter_NullInput_ThrowsArgumentNullException()
{
ArgumentNullException ex = Assert.Throws <ArgumentNullException>(
delegate()
{
SetterDelegate setter = DynamicMethodGenerator.GetFieldSetter(null);
});
Assert.Equal("fieldInfo", ex.ParamName);
}
public void GetFieldSetter_ConstField_ReturnsNull()
{
var fieldInfo = typeof(Int32).GetField("MaxValue");
Assert.NotNull(fieldInfo);
SetterDelegate setter = DynamicMethodGenerator.GetFieldSetter(fieldInfo);
Assert.Null(setter);
}
public void GetFieldSetter_StaticReadonlyField_ReturnsNull()
{
var fieldInfo = typeof(Guid).GetField("Empty");
Assert.NotNull(fieldInfo);
SetterDelegate setter = DynamicMethodGenerator.GetFieldSetter(fieldInfo);
Assert.Null(setter);
}
public void GetFieldSetter_1MillionFieldSets_PerformsInAround10ms()
{
Example instance = new Example();
FieldInfo fieldInfo = typeof(Example).GetField("a", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy);
SetterDelegate setter = DynamicMethodGenerator.GetFieldSetter(fieldInfo);
for (long i = 0; i < MaxCount; i++)
{
setter(instance, "alpha");
}
}
/// <summary>
/// Creates a field setter delegate for the specified property or field
/// </summary>
/// <param name="memberInfo">PropertyInfo or FieldInfo</param>
/// <returns>SetterDelegate for property or field, null otherwise</returns>
public static SetterDelegate GetSetter(MemberInfo memberInfo)
{
if (memberInfo is PropertyInfo)
{
return(DynamicMethodGenerator.GetPropertySetter((PropertyInfo)memberInfo));
}
if (memberInfo is FieldInfo)
{
return(DynamicMethodGenerator.GetFieldSetter((FieldInfo)memberInfo));
}
return(null);
}
public void GetFieldSetter_PrivateField_ReturnsFieldValue()
{
var input = new Example();
var expected = -2;
var fieldInfo = input.GetType().GetField("two", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.FlattenHierarchy);
Assert.NotNull(fieldInfo);
SetterDelegate setter = DynamicMethodGenerator.GetFieldSetter(fieldInfo);
Assert.NotNull(setter);
setter(input, expected);
Assert.Equal(expected, fieldInfo.GetValue(input));
}
public void GetFieldSetter_ValueTypeField_ReturnsFieldValue()
{
var input = new Example();
var expected = -1;
var fieldInfo = input.GetType().GetField("one");
Assert.NotNull(fieldInfo);
SetterDelegate setter = DynamicMethodGenerator.GetFieldSetter(fieldInfo);
Assert.NotNull(setter);
setter(input, expected);
Assert.Equal(expected, input.One);
}
public void GetFieldSetter_StaticField_ChangesFieldValue()
{
var fieldInfo = typeof(Example).GetField("MyStatic");
Assert.NotNull(fieldInfo);
SetterDelegate setter = DynamicMethodGenerator.GetFieldSetter(fieldInfo);
Assert.NotNull(setter);
var prev = Example.MyStatic;
try
{
setter(null, 2010);
Assert.Equal(2010, Example.MyStatic);
}
finally
{
Example.MyStatic = prev;
}
}