public void AddingTwiceAfterEnterWasPressed()
 {
     var displayMock = Substitute.For<Display>();
     var sut = new RpnCalc(displayMock);
     sut.Pressed(1.0);
     sut.Enter();
     sut.Pressed(2.0);
     sut.Enter();
     sut.Add();
     sut.Add();
     displayMock.Received(1).Show(4.0);
     displayMock.Received(1).Show(5.0);
 }
 public void AddThreeNumbers()
 {
     var displayMock = Substitute.For<Display>();
     var sut = new RpnCalc(displayMock);
     sut.Pressed(1.0);
     sut.Enter();
     sut.Pressed(2.0);
     sut.Add();
     sut.Pressed(4.0);
     sut.Add();
     displayMock.Received(2).Show(1.0);
     displayMock.Received(1).Show(2.0);
     displayMock.Received(1).Show(3.0);
     displayMock.Received(1).Show(4.0);
     displayMock.Received(1).Show(7.0);
 }
 public void AddOneNumberWithoutEnter()
 {
     var displayMock = Substitute.For<Display>();
     var sut = new RpnCalc(displayMock);
     sut.Pressed(1.0);
     sut.Add();
     displayMock.Received(2).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);
 }