public void ThrowIfInvalidEnum_Test()
{
// arrange
var values = new List <(Expression <Func <PortState> > expression, bool shouldRaceNull, bool shouldRaceArgument)>
{
(null, true, false),
(() => (PortState)10, false, true),
(() => PortState.Open, false, false),
(() => (PortState)1, false, false)
};
// act & assert
foreach (var value in values)
{
if (value.shouldRaceNull)
{
NAssert.Throws <ArgumentNullException>(() => CheckUtil.ThrowIfInvalidEnum(value.expression), "ArgumentNullException expected but not thrown.");
}
if (value.shouldRaceArgument)
{
NAssert.Throws <ArgumentException>(() => CheckUtil.ThrowIfInvalidEnum(value.expression), "ArgumentException expected but not thrown.");
}
if (!value.shouldRaceNull && !value.shouldRaceArgument)
{
NAssert.DoesNotThrow(() => CheckUtil.ThrowIfInvalidEnum(value.expression), "Unexpected exception.");
}
}
}
public void ThrowIfInvalidEnum_Callback_Test()
{
// arrange
var values = new List <(Expression <Func <PortState> > expression, bool shouldRaceNull, bool shouldRaceArgument)>
{
(null, true, false),
(() => (PortState)10, false, true),
(() => PortState.Open, false, false),
(() => (PortState)1, false, false)
};
var expectedCallbacks = values.Count(v => !v.shouldRaceNull && v.shouldRaceArgument);
var actualCallbacks = 0;
// act && assert for exceptions
foreach (var value in values)
{
if (value.shouldRaceNull)
{
// should not race the callback
NAssert.Throws <ArgumentNullException>(() => CheckUtil.ThrowIfInvalidEnum(value.expression, ex => actualCallbacks++), "ArgumentNullException expected but not thrown.");
}
if (value.shouldRaceArgument)
{
// should race the callback
NAssert.Throws <ArgumentException>(() => CheckUtil.ThrowIfInvalidEnum(value.expression, ex => actualCallbacks++), "ArgumentException expected but not thrown.");
}
if (!value.shouldRaceNull && !value.shouldRaceArgument)
{
// should not race the callback
NAssert.DoesNotThrow(() => CheckUtil.ThrowIfInvalidEnum(value.expression, ex => actualCallbacks++), "Unexpected exception.");
}
}
// assert for correct amount of callbacks called
NAssert.AreEqual(expectedCallbacks, actualCallbacks, "Incorrect amount of callbacks was called.");
}