public void GetMultipleOperationTypeAndRightResultWhenParseMultipleExpression()
{
const string expression = "6*3";
IParser parser = new DefaultParser();
var operation = parser.Parse(expression);
Assert.IsInstanceOfType(operation, typeof(MultiplicateOperation));
Assert.AreEqual(18, operation.Evaluate());
}
public void GetAddOperationTypeAndRightResultWhenParseExpressionWithAddAndMultipleOperations()
{
const string expression = "2+6*3";
const string expression2 = "6*3+2";
IParser parser = new DefaultParser();
var operation = parser.Parse(expression);
Assert.IsInstanceOfType(operation, typeof(AddOperation));
Assert.AreEqual(20, operation.Evaluate());
var operation2 = parser.Parse(expression2);
Assert.IsInstanceOfType(operation2, typeof(AddOperation));
Assert.AreEqual(20, operation2.Evaluate());
}
public void BracesInExpressionHaveHighestPriority()
{
const string expression = "(2+6)*3";
const string expression2 = "6*(3+2)";
IParser parser = new DefaultParser();
var operation = parser.Parse(expression);
Assert.IsInstanceOfType(operation, typeof(MultiplicateOperation));
Assert.AreEqual(24, operation.Evaluate());
var operation2 = parser.Parse(expression2);
Assert.IsInstanceOfType(operation2, typeof(MultiplicateOperation));
Assert.AreEqual(30, operation2.Evaluate());
}
public void AddAndSubtructOperationsCalulate()
{
const string expression = "(6-3-5)";
const string expression2 = "6-(3-2)+5";
const string expression3 = "(6+5)-(3-2)";
const string expression4 = "6-(2*(3-2))";
IParser parser = new DefaultParser();
var operation = parser.Parse(expression);
var operation2 = parser.Parse(expression2);
var operation3 = parser.Parse(expression3);
var operation4 = parser.Parse(expression4);
Assert.AreEqual(-2, operation.Evaluate());
Assert.AreEqual(10, operation2.Evaluate());
Assert.AreEqual(10, operation3.Evaluate());
Assert.AreEqual(4, operation4.Evaluate());
}
public void GetSubtractOperationTypeAndRightResultWhenParseSubtractExpression()
{
const string expression = "6-3";
const string expression2 = "6-3-2";
IParser parser = new DefaultParser();
var operation = parser.Parse(expression);
Assert.IsInstanceOfType(operation, typeof(SubtractOperation));
Assert.AreEqual(3, operation.Evaluate());
var operation2 = parser.Parse(expression2);
Assert.IsInstanceOfType(operation2, typeof(SubtractOperation));
Assert.AreEqual(1, operation2.Evaluate());
}
public void ParseAtomOperation()
{
const string expression = "63";
IParser parser = new DefaultParser();
var operation = parser.Parse(expression);
Assert.IsInstanceOfType(operation, typeof(AtomOperation));
Assert.AreEqual(63, operation.Evaluate());
}
public void MultipleAndDivideOperationsCalulate()
{
const string expression = "6*5/3";
const string expression2 = "50/5/5";
const string expression3 = "(4*4)-(3*3)";
const string expression4 = "50/(5/5)";
IParser parser = new DefaultParser();
var operation = parser.Parse(expression);
var operation2 = parser.Parse(expression2);
var operation3 = parser.Parse(expression3);
var operation4 = parser.Parse(expression4);
Assert.AreEqual(10, operation.Evaluate());
Assert.AreEqual(2, operation2.Evaluate());
Assert.AreEqual(7, operation3.Evaluate());
Assert.AreEqual(50, operation4.Evaluate());
}