public void DefineOperation_MultipleForSameSign_ShouldNotThrow()
{
var calculator = new CalculatorEngine();
calculator.DefineOperation("whatever", (x) => x);
calculator.DefineOperation("whatever", (x, y) => x + y);
calculator.DefineOperation("whatever", (x, y, z) => x + y + z);
}
public void DefineOperation_BinaryAlreadyExists_ShouldThrow()
{
var calculator = new CalculatorEngine();
calculator.DefineOperation("+", (x, y) => x + y);
Assert.Throws <AlreadyExistsOperationException>(() =>
{
calculator.DefineOperation("+", (x, y) => x + y);
});
}
public void DefineOperation_TernaryAlreadyExists_ShouldThrow()
{
var calculator = new CalculatorEngine();
calculator.DefineOperation("whatever", (x, y, z) => x + y + z);
Assert.Throws <AlreadyExistsOperationException>(() =>
{
calculator.DefineOperation("whatever", (x, y, z) => x + y + z);
});
}
public void PerformOperation_Ternary_ShouldCalculate()
{
var calculator = new CalculatorEngine();
calculator.DefineOperation("T5", (x, y, z) => Math.Min(x, Math.Min(y, z)));
var operation = new Operation("T5", new[] { 2.0, 3.0, 6.0 });
var actual = calculator.PerformOperation(operation);
Assert.That(actual, Is.EqualTo(2.0).Within(0.001), "Incorrect calculation result");
}
public void PerformOperation_Binary_ShouldCalculate()
{
var calculator = new CalculatorEngine();
calculator.DefineOperation("*", (x, y) => x * y);
var operation = new Operation("*", new[] { 5.0, 3.0 });
var actual = calculator.PerformOperation(operation);
Assert.That(actual, Is.EqualTo(15.0).Within(0.001), "Incorrect calculation result");
}
public void PerformOperation_Unary_ShouldCalculate()
{
var calculator = new CalculatorEngine();
calculator.DefineOperation("++", x => x + 1);
var operation = new Operation("++", new[] { 3.0 });
var actual = calculator.PerformOperation(operation);
Assert.That(actual, Is.EqualTo(4.0).Within(0.001), "Incorrect calculation result");
}
public void Calculate_TernaryParametersMismatch_ShouldThrow()
{
var calculator = new CalculatorEngine();
calculator.DefineOperation("+", (x, y, z) => x + y + z);
Assert.Throws <ParametersCountMismatchException>(() =>
{
calculator.PerformOperation(new Operation("+", new double[] { 1 }));
});
Assert.Throws <ParametersCountMismatchException>(() =>
{
calculator.PerformOperation(new Operation("+", new double[] { 1, 2 }));
});
}
public void Calculate_ArgumentOutOfRange_ShouldThrow()
{
var calculator = new CalculatorEngine();
var sqrt = new Func <double, double>(
x =>
{
if (x < 0)
{
throw new ArgumentOutOfRangeException();
}
return(Math.Sqrt(x));
});
calculator.DefineOperation("sqrt", sqrt);
Assert.Throws <ArgumentOutOfRangeException>(() =>
{
calculator.PerformOperation(new Operation("sqrt", new double[] { -4 }));
});
}
