public void Cancel_WhenCancel_ThenDisplayValueIsZero()
{
//Arrange
var displayNumber = DisplayNumberFactory.Create("123");
var calculatorState = new CalculatorState.Builder().DisplayNumber(displayNumber)
.Build();
var calculator = new Calculator(calculatorState);
//Act
calculator.Cancel();
//Assert
Assert.That(calculator.DisplayValue, Is.EqualTo("0"));
}
public void Clear_WhenAnyDisplayValue_ThenDisplayValueWillBeReset(string displayValue)
{
//Arrange
var displayNumber = DisplayNumberFactory.Create(displayValue);
var calculatorState = new CalculatorState.Builder().DisplayNumber(displayNumber)
.Build();
var calculator = new Calculator(calculatorState);
//Act
calculator.Clear();
//Assert
Assert.That(calculator.DisplayValue, Is.EqualTo("0"));
}
public string TestClearLastSymbol(string displayValue, bool isLastActionAnBinaryOperation)
{
//Arrange
var displayNumber = DisplayNumberFactory.Create(displayValue);
var calculatorState = new CalculatorState.Builder().DisplayNumber(displayNumber)
.IsLastActionAnBinaryOperation(isLastActionAnBinaryOperation)
.Build();
var calculator = new Calculator(calculatorState);
//Act
calculator.ClearLastSymbol();
//Assert
return(calculator.DisplayValue);
}
public void ApplyDivision_WhenWasNotAnyOperationBefore_ThenDisplayValueWillNotBeChanged(double previousValue, string displayValue)
{
//Arrange
var displayNumber = DisplayNumberFactory.Create(displayValue);
var calculatorState = new CalculatorState.Builder().PreviousValue(previousValue)
.DisplayNumber(displayNumber)
.Build();
var calculator = new Calculator(calculatorState);
var initialDisplayValue = calculator.DisplayValue;
//Act
calculator.ApplyDivision();
//Assert
Assert.That(calculator.DisplayValue, Is.EqualTo(initialDisplayValue));
}
public string TestApplyZero(double previousValue, string displayValue, bool isLastActionAnBinaryOperation)
{
//Arrange
var displayNumber = DisplayNumberFactory.Create(displayValue);
var calculatorState = new CalculatorState.Builder().PreviousValue(previousValue)
.DisplayNumber(displayNumber)
.IsLastActionAnBinaryOperation(isLastActionAnBinaryOperation)
.Build();
var calculator = new Calculator(calculatorState);
//Act
calculator.ApplyZero();
//Assert
return(calculator.DisplayValue);
}
public void Cancel_WhenAnyNumberAndOperationWereAppliedAndThenApplyEquality_ThenDisplayValueIsZero()
{
//Arrange
var displayNumber = DisplayNumberFactory.Create("123");
var calculatorState = new CalculatorState.Builder().PreviousValue(456)
.DisplayNumber(displayNumber)
.Build();
var calculator = new Calculator(calculatorState);
//Act
calculator.Cancel();
calculator.ApplyEquality();
//Assert
Assert.That(calculator.DisplayValue, Is.EqualTo("0"));
}
