public void ComplexExpressionCorrectCalculation()
{
var operationProvider = new BasicOperationProvider();
var converter = new PostfixConverterSortStation(operationProvider);
var executor = new PostfixExecutor(operationProvider);
var input = @"4 * 5 - 27 / 3";
var calculator = new Calculator(converter, executor);
var result = calculator.Calculate(input);
Assert.Equal(11, result);
}
public void TwoNumbersAdditionCorrectResult()
{
var postfix = @"2 2 +";
var provider = new Mock<IOperationProvider>();
provider.Setup(m => m.IsOperation(@"+")).Returns(true);
provider.Setup(m => m.GetOperation(@"+")).Returns(new AddOperation());
var executor = new PostfixExecutor(provider.Object);
var result = executor.Execute(postfix);
Assert.Equal(4, result);
}
public void DivisionByZeroExceptionThrow()
{
var operationProvider = new BasicOperationProvider();
var converter = new PostfixConverterSortStation(operationProvider);
var executor = new PostfixExecutor(operationProvider);
var input = @"13 / 0";
var calculator = new Calculator(converter, executor);
Assert.Throws(typeof(DivideByZeroException), () =>
{
calculator.Calculate(input);
});
}
public void MissingOperandExpressionExceptionThrow()
{
var operationProvider = new BasicOperationProvider();
var converter = new PostfixConverterSortStation(operationProvider);
var executor = new PostfixExecutor(operationProvider);
var input = @"2 + + 7";
var calculator = new Calculator(converter, executor);
Assert.Throws(typeof(IncorrectExpressionException), () =>
{
calculator.Calculate(input);
});
}
public void ComplexExpressionCorrectResult()
{
var postfix = @"4 6 2 / +";
var provider = new Mock<IOperationProvider>();
provider.Setup(m => m.IsOperation(@"/")).Returns(true);
provider.Setup(m => m.IsOperation(@"+")).Returns(true);
provider.Setup(m => m.GetOperation(@"/")).Returns(new DivOperation());
provider.Setup(m => m.GetOperation(@"+")).Returns(new AddOperation());
var executor = new PostfixExecutor(provider.Object);
var result = executor.Execute(postfix);
Assert.Equal(7, result);
}