private void AssertValueTypeConverts <T>(params T[] values) where T : struct
{
// Common factory should detect and return nullable converter
ArgumentValueConverter <T> converter = ArgumentValueConverter.CreateValueConverter <T>();
Assert.AreEqual(typeof(ArgumentValueConverter.ValueTypeConverter <T>), converter.GetType(), "Did not create a pass through converter");
// Loop over the sample values
foreach (T value in values)
{
T result = converter.ConvertFrom(value);
Assert.AreEqual(value, result, "Passthrough<" + typeof(T).Name + " failed to convert");
}
// A null should convert to default(T)
object valueFromNull = converter.ConvertFrom(null);
Assert.IsNotNull(valueFromNull, "Value type conversion from null cannot be null");
Assert.AreEqual(default(T), valueFromNull, "Value type conversion from null should be default(T)");
ExceptionAssert.ThrowsInvalidOperation(
"Attempting to convert a string to a value type should throw",
() => converter.ConvertFrom("hello")
);
}
private void AssertReferenceTypeConverts <T>(params T[] values)
{
// Common factory should detect and return nullable converter
ArgumentValueConverter <T> converter = ArgumentValueConverter.CreateValueConverter <T>();
Assert.AreEqual(typeof(ArgumentValueConverter.ReferenceTypeConverter <T>), converter.GetType(), "Did not create a pass through converter");
T result;
// Loop over the sample values
foreach (T value in values)
{
result = converter.ConvertFrom(value);
Assert.AreEqual(value, result, "Passthrough<" + typeof(T).Name + " failed to convert");
}
// A reference type should be able to convert null
result = converter.ConvertFrom(null);
Assert.IsNull(result, "Converting reference type " + typeof(T).Name + " failed to convert null");
}