public void Parse_FloatLiteral_ReturnsFloatExpression()
{
var expression = (ConstantExpression)DynamicExpression.Parse(typeof(float), "1.0f");
Assert.AreEqual(typeof(float), expression.Type);
Assert.AreEqual(1.0f, expression.Value);
}
public void Parse_DoubleLiteral_ReturnsDoubleExpression()
{
var expression = (ConstantExpression)DynamicExpression.Parse(typeof(double), "1.0");
Assert.AreEqual(typeof(double), expression.Type);
Assert.AreEqual(1.0, expression.Value);
}
public void Parse_StringLiteral_MissingClosingQuote()
{
string expectedRightValue = "\"test\\\"";
var expression = DynamicExpression.Parse(
new[] { Expression.Parameter(typeof(string), "Property1") },
typeof(Boolean),
string.Format("Property1 == {0}", expectedRightValue));
}
public void Parse_ParameterExpressionMethodCall_ReturnsIntExpression()
{
var expression = DynamicExpression.Parse(
new[] { Expression.Parameter(typeof(int), "x") },
typeof(int),
"x + 1");
Assert.AreEqual(typeof(int), expression.Type);
}
public void Parse_StringLiteralEscapedBackslash_ReturnsBooleanLambdaExpression()
{
var expression = DynamicExpression.Parse(
new[] { Expression.Parameter(typeof(string), "Property1") },
typeof(Boolean),
string.Format("Property1 == {0}", "\"test\\\\string\""));
string rightValue = ((BinaryExpression)expression).Right.ToString();
Assert.AreEqual(typeof(Boolean), expression.Type);
Assert.AreEqual("\"test\\string\"", rightValue);
}
public void ParseWithSymbols(int x1, int y1)
{
const string exprString = "iif(x > y, x, y)";
var x = Expression.Parameter(typeof(int), "x");
var y = Expression.Parameter(typeof(int), "y");
var symbols = new Dictionary <string, object>
{
{ "x", x },
{ "y", y }
};
var body = DynamicExpression.Parse(null, exprString, symbols);
var expr = Expression.Lambda(body, new[] { x, y });
var dynamic = expr.Compile().DynamicInvoke(x1, y1);
Console.WriteLine("iif(x > y, x, y) = {2}, (x={0}, y={1})", x1, y1, dynamic);
Assert.AreEqual((x1 > y1) ? x1 : y1, dynamic);
}
public void Parse_StringLiteralEmpty_ReturnsBooleanLambdaExpression()
{
var expression = DynamicExpression.Parse(new[] { Expression.Parameter(typeof(string), "Property1") }, typeof(Boolean), "Property1 == \"\"");
Assert.AreEqual(typeof(Boolean), expression.Type);
}
