public void Negate_ReturnsOptionPosition_WithSameSymbolAndNegativeQuantity()
{
var position = new OptionPosition(Symbols.SPY, 42);
var negated = position.Negate();
Assert.AreEqual(position.Symbol, negated.Symbol);
Assert.AreEqual(-position.Quantity, negated.Quantity);
}
public void SubtractionOperator_DoesNotThrow_WhenOneSideEqualsDefault()
{
var value = new OptionPosition(Symbols.SPY, 42);
var defaultValue = default(OptionPosition);
var valueFirst = value - defaultValue;
var defaultFirst = defaultValue - value;
Assert.AreEqual(value, valueFirst);
Assert.AreEqual(value.Negate(), defaultFirst);
}
public void Equality_IsDefinedUsing_SymbolAndQuantity()
{
var left = new OptionPosition(Symbols.SPY, 42);
var right = new OptionPosition(Symbols.SPY, 42);
Assert.AreEqual(left, right);
Assert.IsTrue(left == right);
right = right.Negate();
Assert.AreNotEqual(left, right);
Assert.IsTrue(left != right);
}