public void CombineShouldReturnLeftIfRightIsPassthrough()
{
var passthrough = PluginFilter.Create;
var expected = PluginFilter.Create.IsNamed("something");
var actual = PluginFilter.Combine(PluginFilter.FilterOperation.And, expected, passthrough);
Assert.AreSame(expected, actual);
}
public void CombineBecomesSubFilters()
{
var left = PluginFilter.Create.IsNamed("left");
var right = PluginFilter.Create.IsNamed("right");
PluginFilter tested = PluginFilter.Combine(PluginFilter.FilterOperation.And, left, right);
Assert.AreEqual(PluginFilter.FilterOperation.And, tested.Operation);
Assert.IsNull(tested.OperationData);
Assert.IsNotNull(tested.SubFilters);
Assert.AreEqual(2, tested.SubFilters.Length);
Assert.AreSame(left, tested.SubFilters[0]);
Assert.AreSame(right, tested.SubFilters[1]);
}
public void CombineShouldMergeIfLeftIsSameOperator()
{
var op = PluginFilter.FilterOperation.Or;
PluginFilter left1 = PluginFilter.Create.IsNamed("left1");
PluginFilter right1 = PluginFilter.Create.IsNamed("right1");
PluginFilter combined1 = PluginFilter.Combine(op, left1, right1);
PluginFilter right2 = PluginFilter.Create.IsNamed("right2");
PluginFilter tested = PluginFilter.Combine(op, combined1, right2);
Assert.AreEqual(op, tested.Operation);
Assert.AreEqual(3, tested.SubFilters.Length);
Assert.IsTrue(tested.SubFilters.Contains(left1));
Assert.IsTrue(tested.SubFilters.Contains(right1));
Assert.IsTrue(tested.SubFilters.Contains(right2));
}
public void CombineOnlyAcceptBooleanOperators()
{
PluginFilter.FilterOperation[] valid = new PluginFilter.FilterOperation[] {
PluginFilter.FilterOperation.And,
PluginFilter.FilterOperation.Or,
};
var invalid = Enum.GetValues(typeof(PluginFilter.FilterOperation)).OfType <PluginFilter.FilterOperation>().Except(valid);
var left = PluginFilter.Create.IsNamed("left");
var right = PluginFilter.Create.IsNamed("right");
foreach (var value in invalid)
{
try
{
PluginFilter.Combine(value, left, right);
Assert.Fail();
}
catch (ArgumentException) { }
}
}
public void CombineRequiresRightArgument()
{
DoAssert.Throws <ArgumentNullException>(() => PluginFilter.Combine(PluginFilter.FilterOperation.And, PluginFilter.Create.IsNamed("left"), null));
}
