public void GetFieldGetter_NullInput_ThrowsArgumentNullException()
{
ArgumentNullException ex = Assert.Throws <ArgumentNullException>(
delegate()
{
GetterDelegate getter = DynamicMethodGenerator.GetFieldGetter(null);
});
Assert.Equal("fieldInfo", ex.ParamName);
}
public void GetFieldGetter_ConstField_ReturnsFieldValue()
{
var fieldInfo = typeof(Int32).GetField("MaxValue");
Assert.NotNull(fieldInfo);
GetterDelegate getter = DynamicMethodGenerator.GetFieldGetter(fieldInfo);
Assert.NotNull(getter);
Assert.Equal(Int32.MaxValue, getter(null));
}
public void GetFieldGetter_StaticReadonlyField_ReturnsFieldValue()
{
var fieldInfo = typeof(Guid).GetField("Empty");
Assert.NotNull(fieldInfo);
GetterDelegate getter = DynamicMethodGenerator.GetFieldGetter(fieldInfo);
Assert.NotNull(getter);
Assert.Equal(Guid.Empty, getter(null));
}
public void GetFieldGetter_StaticField_ReturnsFieldValue()
{
var fieldInfo = typeof(Example).GetField("MyStatic");
Assert.NotNull(fieldInfo);
GetterDelegate getter = DynamicMethodGenerator.GetFieldGetter(fieldInfo);
Assert.NotNull(getter);
Assert.Equal(42, getter(null));
}
/// <summary>
/// Creates a field getter delegate for the specified property or field
/// </summary>
/// <param name="memberInfo">PropertyInfo or FieldInfo</param>
/// <returns>GetterDelegate for property or field, null otherwise</returns>
/// <remarks>
/// Note: use with caution this method will expose private and protected constructors without safety checks.
/// </remarks>
public static GetterDelegate GetGetter(MemberInfo memberInfo)
{
if (memberInfo is PropertyInfo)
{
return(DynamicMethodGenerator.GetPropertyGetter((PropertyInfo)memberInfo));
}
if (memberInfo is FieldInfo)
{
return(DynamicMethodGenerator.GetFieldGetter((FieldInfo)memberInfo));
}
return(null);
}
public void GetFieldGetter_1MillionFieldGets_PerformsInAround10ms()
{
Example instance = new Example();
FieldInfo fieldInfo = typeof(Example).GetField("a", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy);
GetterDelegate getter = DynamicMethodGenerator.GetFieldGetter(fieldInfo);
string value = null;
for (long i = 0; i < MaxCount; i++)
{
value = (string)getter(instance);
}
}
public void GetFieldGetter_PrivateField_ReturnsFieldValue()
{
var input = new Example();
var fieldInfo = input.GetType().GetField("two", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.FlattenHierarchy);
Assert.NotNull(fieldInfo);
GetterDelegate getter = DynamicMethodGenerator.GetFieldGetter(fieldInfo);
Assert.NotNull(getter);
Assert.Equal(2, getter(input));
}
public void GetFieldGetter_ValueTypeField_ReturnsFieldValue()
{
var input = new Example();
var fieldInfo = input.GetType().GetField("one");
Assert.NotNull(fieldInfo);
GetterDelegate getter = DynamicMethodGenerator.GetFieldGetter(fieldInfo);
Assert.NotNull(getter);
Assert.Equal(1, getter(input));
}