public void SubstitutionTestId()
{
BaseExpression expr = BaseExpression.Parse("x + y + z");
BaseExpression expr2 = expr.Subst(new Dictionary <string, BaseExpression>());
Assert.AreEqual(expr.ToString(), expr2.ToString());
}
public void GenerateLibrary_ThreeArgsExpression()
{
var xyzExpr = BaseExpression.Parse("(66 + (x * -4)) / z + y / 9 + z * (x - y)");
xyzExpr.Compile("Test_GenerateLibrary_LaunchFunction");
Assembly assembly = Assembly.LoadFrom("Test_GenerateLibrary_LaunchFunction.dll");
Type type = assembly.GetType("Evaluator");
MethodInfo evalMethod = type.GetMethod("Evaluate");
Assert.NotNull(evalMethod);
int x = 2, y = 3, z = 5;
var subst = new Dictionary <string, BaseExpression>();
subst["x"] = new IntegerExpression(x);
subst["y"] = new IntegerExpression(y);
subst["z"] = new IntegerExpression(z);
var substExpr = xyzExpr.Subst(subst);
object evaluatorObject = Activator.CreateInstance(type);
int result = (int)evalMethod.Invoke(evaluatorObject, new object[] { x, y, z });
substExpr.EvaluateBe().ExtractRawInteger(out int expected);
Assert.AreEqual(expected, result);
}
private static BaseExpression Minimize(string input)
{
var iex = BaseExpression.Parse(input);
var reduced = iex.Normalize().EvaluateBe();
return(reduced);
}
public void InvalidDoubleMinus()
{
Assert.Throws <ParseException>(() =>
{
BaseExpression.Parse("7 - - 5");
});
}
public void ExprWithVarTest()
{
Assert.DoesNotThrow(() =>
{
BaseExpression.Parse("x + 4");
});
}
public void UnitInvalid()
{
Assert.Throws <ParseException>(() =>
{
BaseExpression.Parse("()");
});
}
public void EmptyInvalid()
{
Assert.Throws <ParseException>(() =>
{
BaseExpression.Parse("");
});
}
public void AssocInvalidUnbalancedClosed()
{
Assert.Throws <ParseException>(() =>
{
BaseExpression.Parse("(4 + 1) + 5)");
});
}
public void AssocInvalidUnbalancedOpen()
{
Assert.Throws <ParseException>(() =>
{
BaseExpression.Parse("(4 + 1 + 5");
});
}
// Utilitiy functions
private static int RawEval(string input)
{
var iex = BaseExpression.Parse(input);
var reduced = iex.EvaluateBe();
Assert.True(reduced.ExtractRawInteger(out var result));
return(result);
}
public void SubstitutionTestId2()
{
BaseExpression expr = BaseExpression.Parse("1 + 2 + x + y");
var subst = new Dictionary <string, BaseExpression>();
subst["a"] = new IntegerExpression(3);
subst["b"] = new IntegerExpression(9);
BaseExpression expr2 = expr.Subst(subst);
Assert.AreEqual(expr.ToString(), expr2.ToString());
}
public void RandomTest_ExprToStringAndParse()
{
var maxTreeLvl = 50;
var N = 10000;
var rnd = new Random();
for (var i = 0; i < N; i++)
{
var rand = GenerateRandomExpression(rnd, maxTreeLvl);
var randAsString = rand.ToString();
var rand2 = BaseExpression.Parse(randAsString);
var rand2AsString = rand2.ToString();
Assert.AreEqual(randAsString, rand2AsString, "wrong value at iteration " + i);
}
}
public void SubstitutionSimpleTest()
{
BaseExpression exprExpected = BaseExpression.Parse("3 + (-1 * -4) / 2 - 0 % 17");
BaseExpression expr = BaseExpression.Parse("x + (y * z) / w - k % l");
var subst = new Dictionary <string, BaseExpression>();
subst["x"] = new IntegerExpression(3);
subst["y"] = new IntegerExpression(-1);
subst["z"] = new IntegerExpression(-4);
subst["w"] = new IntegerExpression(2);
subst["k"] = new IntegerExpression(0);
subst["l"] = new IntegerExpression(17);
BaseExpression exprSubst = expr.Subst(subst);
exprExpected.EvaluateBe().ExtractRawInteger(out var expected);
exprSubst.EvaluateBe().ExtractRawInteger(out var actual);
Assert.AreEqual(expected, actual);
}