public void EvalCanEvaluateLastQPrompt()
{
//Arrange
Parse input = new Parse("-10 - 2");
Parse input2 = new Parse("5*5");
Parse input3 = new Parse("lastq");
/// Act
Evaluate eval = new Evaluate(input); // Initializes session
eval.EvaluateExpression(input2);
eval.EvaluateExpression(input3);
//Assert
Assert.AreEqual(eval.lastQ, "5*5");
}
public void EvalAssignUsedConstantThrowsException()
{
Parse input = new Parse("x = 3");
Parse input2 = new Parse("x = 10");
Evaluate eval = new Evaluate(input);
eval.EvaluateExpression(input2);
}
public void EvalAddsMultipleToResultHistory()
{
Parse input = new Parse("-10 - 2");
Parse input2 = new Parse("5*5");
Evaluate eval = new Evaluate(input); // Initializes session
eval.EvaluateExpression(input2); // Every subsequent parse/equation gets passed to evaluateExpression method
List<int> expected = eval.resultHistory;
CollectionAssert.AreEqual(expected, new List<int>() { -12, 25 });
}
public void StackCanRetrieveLastQ()
{
Parse input = new Parse("10%4");
Evaluate eval = new Evaluate(input);
Parse input2 = new Parse("lastq");
eval.EvaluateExpression(input2);
Stack stack = new Stack(eval);
string expected = stack.lastQ;
Assert.AreEqual(expected, "10%4");
}
public void StackCanEvalExpressionWithPrevDeclaredConstant()
{
Parse input = new Parse("x = 3");
Parse input2 = new Parse("x*5");
Evaluate eval = new Evaluate(input);
eval.EvaluateExpression(input2);
Stack stack = new Stack(eval);
// Act
int expected = stack.currentAnswer;
//Assert
Assert.AreEqual(expected, 15);
}
static void Main(string[] args)
{
int count = 0;
string prompt = "[" + count.ToString() + "]>";
string instructions = "Type in a binary equation, then press enter." + System.Environment.NewLine + "Type 'quit' or 'exit' to exit the program." + System.Environment.NewLine + prompt;
Console.Write(instructions);
string userInput = Console.ReadLine();
Parse firstInput = new Parse(userInput);
Evaluate eval = new Evaluate(firstInput);
Stack stack = new Stack(eval);
count += 1;
prompt = "[" + count.ToString() + "]>";
Console.Write(" = " + stack.currentAnswer.ToString() + System.Environment.NewLine + prompt);
userInput = Console.ReadLine();
//ProgramInitializer PI = new ProgramInitializer();
//string userInput = Console.ReadLine();
//PI.EvaluateFirstExpression(userInput);
//Evaluate eval = PI.FirstEval;
//Stack stack = PI.ProgramStack;
//Console.Write(" = " + stack.currentAnswer.ToString() + System.Environment.NewLine);
//userInput = Console.ReadLine();
while (userInput != "quit" || userInput != "exit")
{
try
{
Parse input = new Parse(userInput);
eval.EvaluateExpression(input);
stack.stackEvaluate(eval);
count += 1;
prompt = "[" + count.ToString() + "]>";
Console.Write(" = " + stack.currentAnswer.ToString() + System.Environment.NewLine + prompt);
userInput = Console.ReadLine();
}
catch (Exception ex)
{
if (userInput == "quit" || userInput == "exit")
{
break;
}
else
{
prompt = "[" + count.ToString() + "]>";
Console.Write("There was an error. Please try again." + System.Environment.NewLine + prompt);
userInput = Console.ReadLine();
}
}
}
}
public static void Main(string[] args)
{
Console.WriteLine("Please enter a simple arithmetic expression.");
Terminal user_term = new Terminal();
Expression user_expression = new Expression();
Evaluate math_ops = new Evaluate();
EvalStack eval_stack = new EvalStack();
bool loop_runner = true;
while (loop_runner)
{
Console.Write(user_term.PromptInitialUserInput());
string user_input = Console.ReadLine();
if (user_input == "lastq")
{
Console.WriteLine(user_term.ReturnLastExpression(eval_stack));
}
else if (user_input == "last")
{
Console.WriteLine(user_term.DisplayExpressionResult(eval_stack.last));
}
else if (user_input == "exit" || user_input == "quit")
{
Environment.Exit(0);
}
else if (user_input.Contains('='))
{
object[] parsed_expression = user_expression.Parse(user_input, eval_stack);
user_term.counter++;
}
else
{
object[] parsed_expression = user_expression.Parse(user_input, eval_stack);
double expression_output = math_ops.EvaluateExpression(parsed_expression, eval_stack);
user_term.counter++;
Console.WriteLine(user_term.DisplayExpressionResult(expression_output));
}
}
}