public void UnknownSign_ThrowsExceptions()
{
// Arrange
var unknownOperator = 'x';
// Act
var result = sut.Create(unknownOperator, 0);
// Assert
Assert.Fail("Should have thrown an exception");
}
public void GetMaxPrecedence()
{
List <MathToken> tokens = _lexer.GetTokens("3 + 3 * 2");
MathToken token = _precedence.GetMaxPrecedence(tokens);
MathOperator op = OperatorFactory.Create(token.Token);
Assert.AreEqual(op.Token, "*");
}
public void ThrowExceptionGivenNoOperator()
{
// Arrange
OperatorFactory SystemUnderTest = new OperatorFactory();
string InvalidOperation = "1242&213124";
// Act + Assert
Should.Throw <ArgumentException>(() => SystemUnderTest.Create(InvalidOperation));
}
public void CreateCorrectType(string operationText, Type createdType)
{
// Arrange
OperatorFactory SystemUnderTest = new OperatorFactory();
// Act
IOperator createdOperator = SystemUnderTest.Create(operationText);
// Assert
createdOperator.ShouldBeOfType(createdType);
}
public void CreateDivisionOperator()
{
MathOperator op = OperatorFactory.Create("/");
Assert.AreEqual(op.Precedence, 2);
}
public void CreateMultiplyOperator()
{
MathOperator op = OperatorFactory.Create("*");
Assert.AreEqual(op.Precedence, 2);
}