public void Evaluate_WithInvalidOperation_ReturnsResult()
{
IMathExpression leftOperand = new VariableReference("x", 4);
const char operationChar = '?';
IMathExpression rightOperand = new VariableReference("y", 2);
MathOperation operation = new MathOperation(leftOperand,
operationChar,
rightOperand);
Assert.AreEqual(2, operation.Evaluate());
}
public void Evaluate_WithMultOperation_ReturnsResult()
{
IMathExpression leftOperand = new VariableReference("x", 1);
const char operationChar = '*';
IMathExpression rightOperand = new VariableReference("y", 1);
MathOperation operation = new MathOperation(leftOperand,
operationChar,
rightOperand);
Assert.AreEqual(1, operation.Evaluate());
}
public void Evaluate_WithReferences2_ReturnsResult()
{
// x+ ((y*x)/2)
IMathExpression leftOperand = new VariableReference("x", 4);
const char operationChar = '+';
IMathExpression rightOperand = new VariableReference("y", 2);
MathOperation operation = new MathOperation(leftOperand,
operationChar,
new MathOperation(new MathOperation(rightOperand, '*', leftOperand), '/', new ConstantReference(2)));
Assert.AreEqual(8, operation.Evaluate());
}
public void Evaluate_WithReferences_ReturnsResult()
{
// x+ (y*2)
IMathExpression leftOperand = new VariableReference("x", 4);
const char operationChar = '+';
IMathExpression rightOperand = new VariableReference("y", 2);
MathOperation operation = new MathOperation(leftOperand,
operationChar,
new MathOperation(rightOperand,'*',new ConstantReference(2)));
Assert.AreEqual(8, operation.Evaluate());
}