static void VariableTest3(BooleanContext context, PrefixBooleanParser parser)
{
var e1 = parser.Parse("AND OR X 0 NOT 0");
context.SetVariable("X", false);
var expected_value = false;
var actual_value = EvaluateAndPrint(e1, context);
Debug.Assert(actual_value == expected_value);
}
static void VariableTest(BooleanContext context, PrefixBooleanParser parser)
{
Console.WriteLine("Test Cases for Variable Boolean Expression");
VariableTest1(context, parser);
VariableTest2(context, parser);
VariableTest3(context, parser);
VariableTest4(context, parser);
VariableTest5(context, parser);
VariableTest6(context, parser);
}
static void Main(string[] args)
{
var context = new BooleanContext();
var parser = new PrefixBooleanParser();
SimpleTest(context, parser);
ExceptionTest(context, parser);
VariableTest(context, parser);
Console.WriteLine("All test cases passed");
Console.ReadKey();
}
static void SimpleTest(BooleanContext context, PrefixBooleanParser parser)
{
Console.WriteLine("Test Cases for Simple Boolean Expression");
foreach (var test_prefix_expression in ExampleBooleanExpressions.TestExpression)
{
var expression = parser.Parse(test_prefix_expression.Item1);
var actual_value = EvaluateAndPrint(expression, context);
var expected_value = test_prefix_expression.Item2;
Debug.Assert(actual_value == expected_value);
}
}
static void VariableTest5(BooleanContext context, PrefixBooleanParser parser)
{
var e1 = parser.Parse("AND OR AND X Y NOT Z W");
context.SetVariable("X", true);
context.SetVariable("Y", true);
context.SetVariable("Z", true);
context.SetVariable("W", true);
var expected_value = true;
var actual_value = EvaluateAndPrint(e1, context);
Debug.Assert(actual_value == expected_value);
}
static void ExceptionTest(BooleanContext context, PrefixBooleanParser parser)
{
Console.WriteLine("Test Cases for Invalid Prefix format");
foreach (var test_prefix_expression in ExampleBooleanExpressions.TestExceptionExpression)
{
bool exception_thrown = false;
try
{
var expression = parser.Parse(test_prefix_expression);
}
catch (SyntaxErrorException)
{
exception_thrown = true;
Console.WriteLine("Correctly detected invalid format: {0}", test_prefix_expression);
}
Debug.Assert(exception_thrown);
}
}
static bool EvaluateAndPrint(IBooleanExpression expression, BooleanContext context)
{
Console.WriteLine("Expression: {0}", expression.ToString());
var value = expression.Evaluate(context);
if (value)
{
Console.WriteLine("Evaluated: true");
}
else
{
Console.WriteLine("Evaluated: false");
}
Console.WriteLine("");
Console.WriteLine("----------------------------------------");
return(value);
}
public bool Evaluate(BooleanContext context)
{
return(firstExpression.Evaluate(context) && secondExpression.Evaluate(context));
}
public bool Evaluate(BooleanContext context)
{
return(context.GetVariable(value));
}
public bool Evaluate(BooleanContext context)
{
return(value);
}