public void SubtractThreeNumbers()
{
var displayMock = Substitute.For<Display>();
var sut = new RpnCalc(displayMock);
sut.Pressed(3.0);
sut.Enter();
sut.Pressed(2.0);
sut.Subtract();
sut.Pressed(5.0);
sut.Subtract();
displayMock.Received(2).Show(3.0);
displayMock.Received(1).Show(2.0);
displayMock.Received(1).Show(1.0);
displayMock.Received(1).Show(5.0);
displayMock.Received(1).Show(-4.0);
}
public void SubtractingTwiceAfterEnterWasPressedWhileReachingStackBoundary()
{
var displayMock = Substitute.For<Display>();
var sut = new RpnCalc(displayMock);
sut.Pressed(6.0);
sut.Enter();
sut.Pressed(4.0);
sut.Enter();
sut.Pressed(3.0);
sut.Enter();
sut.Subtract();
sut.Subtract();
sut.Subtract();
sut.Subtract();
displayMock.Received(1).Show(0.0);
displayMock.Received(4).Show(4.0);
displayMock.Received(1).Show(2.0);
}
public void SubtractOneNumberWithoutEnter()
{
var displayMock = Substitute.For<Display>();
var sut = new RpnCalc(displayMock);
sut.Pressed(1.0);
sut.Subtract();
displayMock.Received(1).Show(1.0);
displayMock.Received(1).Show(-1.0);
}
public void IntegrationTestAddingSubtractingAndMultiplying()
{
var displayMock = Substitute.For<Display>();
var sut = new RpnCalc(displayMock);
sut.Pressed(1);
sut.Enter();
sut.Pressed(2);
sut.Add();
sut.Pressed(4);
sut.Enter();
sut.Pressed(1);
sut.Subtract();
sut.Multiply();
displayMock.Received(3).Show(1.0);
displayMock.Received(1).Show(2.0);
displayMock.Received(2).Show(3.0);
displayMock.Received(2).Show(4.0);
displayMock.Received(1).Show(9.0);
}