public Calculator(ISum adder, ISubtract subtractor)
{
_adder = adder;
_subtractor = subtractor;
this.Id = Guid.NewGuid();
}
public void Create_ForSubtractIsNull_Throws()
{
_subtract = null;
Action action = () => CreateSut();
action.Should()
.Throw <ArgumentNullException>()
.WithParameter("subtract");
}
public Calculator([NotNull] IAdd add,
[NotNull] ISubtract subtract)
{
Guard.ArgumentNotNull(add,
nameof(add));
Guard.ArgumentNotNull(subtract,
nameof(subtract));
_add = add;
_subtract = subtract;
}
public void Subtract_ForNumbers_Subtracts(Calculator sut,
[Freeze] ISubtract subtract)
{
subtract?.Execute(1,
2)
.Returns(-1);
sut.Subtract(1,
2)
.Should()
.Be(-1);
}
public void Create_ForSubtractIsNull_Throws(Lazy <Calculator> sut,
[BeNull] ISubtract subtract)
{
// ReSharper disable once UnusedVariable
Action action = () =>
{
var actual = sut.Value;
};
action.Should()
.Throw <ArgumentNullException>()
.WithParameter("subtract");
}
public void TestInitialize()
{
_add = Substitute.For <IAdd>();
_subtract = Substitute.For <ISubtract>();
}
