public void Parse_AllFunctions()
{
string[] functions =
{
"abs", "sqrt", "exp", "ln", "log",
"sin", "cos", "tan",
"asin", "acos", "atan",
"sinh", "cosh", "tanh",
"round", "floor", "ceil"
};
string input = "";
for (int i = 0; i < functions.Length; i++)
{
if (i > 0)
{
input += " + ";
}
input += functions[i] + "(x)";
}
ArithmeticExpression ae = ArithmeticExpression.Parse(input);
Assert.IsNotNull(ae);
for (int i = 0; i < functions.Length; i++)
{
Assert.IsTrue(ae.IsCallbackUsed("operator_" + functions[i]));
}
Assert.IsFalse(ae.IsCallbackUsed("unknown"));
}
private void OnDuplicateButtonClick(object sender, EventArgs e)
{
ListView.Item selected = listView.FocusedItem;
if (selected != null && selected.NumericValueSource is ArithmeticExpression)
{
ArithmeticExpression ae = ArithmeticExpression.Parse(selected.Text);
ae.Callbacks = selected.OperatorCallbacks;
ListView.Item item = new ListView.Item {
OperatorCallbacks = selected.OperatorCallbacks,
Color = FindNewColor(),
CheckState = selected.CheckState,
CheckEnabled = selected.CheckEnabled,
ImageResourceCallback = OnImageResourceCallback,
Description = selected.Description,
NumericValueSource = ae,
Text = selected.Text,
TextDisplay = selected.TextDisplay
};
listView.Items.Add(item);
listView.FocusedItem = item;
listView.Invalidate();
listView.Update();
listView.EnsureVisible(item);
}
}
public void Evaluate_Precedence()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("1 / (2 * 4) ^ 2");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(1.0 / Math.Pow(2.0 * 4.0, 2), result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_SimpleExpression()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("(2 - 1 + 6) % 5");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual((2 - 1 + 6) % 5, result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Parentheses()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("((( ((( ((( 1 + 2 ))) + 3 ))) + 4 ))) + 5");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(1 + 2 + 3 + 4 + 5, result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Function_Log()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("log(10 * 10 * 10 * 10)");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(4.0, result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_SimpleFunction_AutoMultiply()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("5sqrt(x)");
double result = ae.Evaluate(16);
Assert.AreEqual(5.0 * Math.Sqrt(16), result);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Variable()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("x");
double result = ae.Evaluate(-10);
Assert.AreEqual(-10, result);
Assert.AreEqual("x", ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Constant_AutoMultiply()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("2pi");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(2.0 * Math.PI, result);
Assert.IsNull(ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Constant_3()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("6e-3");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(0.006, result);
Assert.IsNull(ae.VariableName);
Assert.IsTrue(ae.IsSimpleConstantOnly);
}
public void Evaluate_Comment()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("1 + 2 + 3 # This is comment!");
double result = ae.Evaluate(double.NaN);
Assert.AreEqual(6, result);
Assert.IsNull(ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Function_RoundDown()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("round(z)");
double result = ae.Evaluate(6.49);
Assert.AreEqual(6.0, result);
Assert.AreEqual("z", ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_SimpleFunction()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("cos(custom)");
double result = ae.Evaluate(0);
Assert.AreEqual(1.0, result);
Assert.AreEqual("custom", ae.VariableName);
Assert.IsFalse(ae.IsSimpleConstantOnly);
}
public void Evaluate_Variable_2()
{
ArithmeticExpression ae1 = ArithmeticExpression.Parse("sin(x)");
double result1 = ae1.Evaluate(10);
ArithmeticExpression ae2 = ArithmeticExpression.Parse("sin(10)");
double result2 = ae2.Evaluate(double.NaN);
Assert.AreEqual(result1, result2);
}
public void Evaluate_KnownConstants()
{
ArithmeticExpression ae1 = ArithmeticExpression.Parse("pi");
double result1 = ae1.Evaluate(double.NaN);
Assert.AreEqual(Math.PI, result1);
ArithmeticExpression ae2 = ArithmeticExpression.Parse("e");
double result2 = ae2.Evaluate(double.NaN);
Assert.AreEqual(Math.E, result2);
}
public void Parse_AllOperators()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("0 + 1 - (2 * (3 / 4)) ^ (5 % 6)");
Assert.IsNotNull(ae);
Assert.IsTrue(ae.IsCallbackUsed("operator_add"));
Assert.IsTrue(ae.IsCallbackUsed("operator_subtract"));
Assert.IsTrue(ae.IsCallbackUsed("operator_multiply"));
Assert.IsTrue(ae.IsCallbackUsed("operator_divide"));
Assert.IsTrue(ae.IsCallbackUsed("operator_pow"));
Assert.IsTrue(ae.IsCallbackUsed("operator_remainder"));
Assert.IsFalse(ae.IsCallbackUsed("unknown"));
}
public void Evaluate_Callbacks()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("(+1) * (-2) * 3");
DotNetOperatorCallbacks callbacks = new DotNetOperatorCallbacks();
ae.Callbacks = callbacks;
double result = ae.Evaluate(0);
Assert.AreEqual((+1) * (-2) * 3, result);
Assert.AreEqual(callbacks, ae.Callbacks);
Assert.IsFalse(callbacks.IsDisposed);
callbacks.Dispose();
Assert.IsTrue(callbacks.IsDisposed);
}
public void Parse_InvalidInput_7()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("sin sin(x)");
}
private void OnItemPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == "Text")
{
ListView.Item item = (ListView.Item)sender;
if (string.IsNullOrEmpty(item.Text))
{
item.NumericValueSource = null;
item.TextDisplay = "\f[0x999999]" + Tx.T("main.enter expression");
}
else
{
try {
ArithmeticExpression ae = ArithmeticExpression.Parse(item.Text);
ae.Callbacks = item.OperatorCallbacks;
item.NumericValueSource = ae;
int i = item.Text.IndexOf('#');
if (i != -1)
{
while (i > 0 && item.Text[i - 1] == ' ')
{
i--;
}
StringBuilder sb = new StringBuilder();
sb.Append(item.Text, 0, i);
if (ae.VariableName == null && !ae.IsSimpleConstantOnly)
{
double result = ae.Evaluate(double.NaN);
sb.Append("\f[I]\f[0x999999] = ");
sb.Append(result.ToExactString().LimitSize(32));
sb.Append(" \f[I]");
}
sb.Append("\f[0x498E3E]");
sb.Append(item.Text, i, item.Text.Length - i);
CheckCallbacks(item, sb);
item.TextDisplay = sb.ToString();
}
else
{
if (ae.VariableName == null && !ae.IsSimpleConstantOnly)
{
StringBuilder sb = new StringBuilder();
sb.Append(item.Text);
double result = ae.Evaluate(double.NaN);
sb.Append("\f[I]\f[0x999999] = ");
if (double.IsPositiveInfinity(result))
{
sb.Append("+∞");
}
else if (double.IsNegativeInfinity(result))
{
sb.Append("−∞");
}
else
{
sb.Append(result.ToExactString().LimitSize(32));
}
sb.Append("\f[I]");
CheckCallbacks(item, sb);
item.TextDisplay = sb.ToString();
}
else
{
StringBuilder sb = new StringBuilder();
sb.Append(item.Text);
CheckCallbacks(item, sb);
item.TextDisplay = sb.ToString();
}
}
} catch (SyntaxException ex) {
item.NumericValueSource = null;
StringBuilder sb = new StringBuilder();
sb.Append("\f[0x8b0000]");
int length = ex.Input.IndexOf('#');
if (length == -1)
{
length = ex.Input.Length;
}
if (length < 3)
{
sb.Append(ex.Input);
}
else
{
if (ex.Index - 1 < 0)
{
sb.Append("\f[U]");
}
else
{
sb.Append(ex.Input, 0, ex.Index - 1);
sb.Append("\f[U]\f[0xd00000]");
sb.Append(ex.Input[ex.Index - 1]);
}
sb.Append("\f[0xff0000]");
sb.Append(ex.Input[ex.Index]);
if (ex.Index + 1 < length)
{
sb.Append("\f[0xd00000]");
sb.Append(ex.Input[ex.Index + 1]);
sb.Append("\f[0x8b0000]\f[U]");
if (ex.Index + 2 < length)
{
sb.Append(ex.Input, ex.Index + 2, length - (ex.Index + 2));
}
}
else
{
sb.Append("\f[0xd00000] \f[U]");
}
}
switch (ex.ExceptionType)
{
case SyntaxException.Type.Unknown:
break;
case SyntaxException.Type.InvalidNumber:
sb.Append(" \f[-]\f[image:warning] \f[0xaa6400]\f[I]");
sb.Append(Tx.T("expression.errors.invalid number"));
break;
case SyntaxException.Type.DistinctVariableCountExceeded:
sb.Append(" \f[-]\f[image:warning] \f[0xaa6400]\f[I]");
sb.Append(Tx.T("expression.errors.distinct variable count exceeded"));
break;
case SyntaxException.Type.ParenthesesCountMismatch:
sb.Append(" \f[-]\f[image:warning] \f[0xaa6400]\f[I]");
sb.Append(Tx.T("expression.errors.parentheses count mismatch"));
break;
default:
throw new InvalidEnumArgumentException("ex.ExceptionType", (int)ex.ExceptionType, typeof(SyntaxException.Type));
}
item.TextDisplay = sb.ToString();
} catch (Exception ex) {
item.NumericValueSource = null;
item.TextDisplay = "\f[0x8b0000]" + item.Text + " \f[-]\f[image:warning] \f[0xaa6400]\f[I]" + ex.Message;
}
}
item.CheckEnabled = (item.NumericValueSource != null);
RefreshToolStrip();
}
else if (e.PropertyName == "OperatorCallbacks")
{
ListView.Item item = (ListView.Item)sender;
ArithmeticExpression arithmeticExpression = item.NumericValueSource as ArithmeticExpression;
if (arithmeticExpression != null)
{
arithmeticExpression.Callbacks = item.OperatorCallbacks;
OnItemPropertyChanged(item, new PropertyChangedEventArgs("Text"));
}
item.Description = item.OperatorCallbacks.ImplementationName;
}
}
public void Parse_InvalidNumber()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("5,5");
}
public void Parse_BadParentheses_2()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("((1 + 2)))");
}
public void Parse_BadParentheses_1()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("(1 + 2");
}
public void Parse_UnknownFunction()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("unknown(x)");
}
public void Parse_Variables()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("x * y");
}
public void Parse_Empty()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("");
}
public void Parse_InvalidInput_9()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("(5 * 5) pi");
}
public void Parse_InvalidInput_10()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("50 50");
}
public void Parse_InvalidInput_6()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("(2 +)");
}
public void Parse_InvalidInput_5()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("10 20 + 30");
}
public void Parse_InvalidInput_8()
{
ArithmeticExpression ae = ArithmeticExpression.Parse("(5 * 5) sqrt(16)");
}
