public void EvaluateTests(string expression, int expectedResult)
{
var divExpression = new DivExpression();
int result = divExpression.Evaluate(expression);
Assert.That(result, Is.EqualTo(expectedResult));
}
public void RaiseIfDivideRealByInteger()
{
DivExpression expr = new DivExpression(new ConstantExpression(6.5), new ConstantExpression(2));
try
{
expr.Evaluate(null);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(InvalidCastException));
}
}
public void RaiseIfDivideRealByInteger()
{
DivExpression expr = new DivExpression(new ConstantExpression(6.5), new ConstantExpression(2));
try
{
expr.Evaluate(null);
Assert.Fail();
}
catch (Exception ex)
{
Assert.IsInstanceOfType(ex, typeof(InvalidCastException));
}
}
public void DivideTwoIntegersWithTruncation()
{
DivExpression expr = new DivExpression(new ConstantExpression(5), new ConstantExpression(2));
Assert.AreEqual(2, expr.Evaluate(null));
}
public void DivideTwoIntegers()
{
DivExpression expr = new DivExpression(new ConstantExpression(6), new ConstantExpression(2));
Assert.AreEqual(3, expr.Evaluate(null));
}
public void DivideTwoIntegersWithTruncation()
{
DivExpression expr = new DivExpression(new ConstantExpression(5), new ConstantExpression(2));
Assert.AreEqual(2, expr.Evaluate(null));
}
public void DivideTwoIntegers()
{
DivExpression expr = new DivExpression(new ConstantExpression(6), new ConstantExpression(2));
Assert.AreEqual(3, expr.Evaluate(null));
}
public void EvaluateDivideByZero()
{
var divExpression = new DivExpression();
Assert.Throws(typeof(DivideByZeroException), () => divExpression.Evaluate("div(1,0)"));
}
public void ErrorEvaluateTests(string expression)
{
var divExpression = new DivExpression();
Assert.Throws(typeof(ArithmeticException), () => divExpression.Evaluate(expression));
}