public void ParsePrimitiveConstant()
{
Expression <Func <int> > f = () => 5;
ConstantNode constantNode = NaturalExpressionParser.Parse(f.Body) as ConstantNode;
Assert.AreEqual("5", constantNode.Text);
}
public void ParseArrayCreateAndIndex()
{
Expression <Func <int> > f = () => new int[] { 1, 2, 3 }[1];
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new ArrayIndexNode
{
Array = new NewArrayNode
{
Type = "int",
Items = new List <Node>
{
new ConstantNode {
Text = "1"
},
new ConstantNode {
Text = "2"
},
new ConstantNode {
Text = "3"
},
}
},
Index = new ConstantNode {
Text = "1"
},
Value = "2"
};
Assert.AreEqual(expected, node);
}
public void ParseStringConstant()
{
Expression <Func <string> > f = () => "foo";
ConstantNode constantNode = NaturalExpressionParser.Parse(f.Body) as ConstantNode;
Assert.AreEqual("\"foo\"", constantNode.Text);
}
public void ParsePrimitiveStaticField()
{
Expression <Func <int> > f = () => field;
ConstantNode constantNode = NaturalExpressionParser.Parse(f.Body) as ConstantNode;
Assert.AreEqual("field", constantNode.Text);
Assert.AreEqual("5", constantNode.Value);
}
public static Exception CreateException(LambdaExpression expression, string message)
{
Node constantNode = NaturalExpressionParser.Parse(expression.Body);
string[] lines = NodeFormatter.Format(constantNode);
string nl = Environment.NewLine;
return(new Exception(message + ", expression was:" + nl + nl + String.Join(nl, lines)));
}
public void ParseMember()
{
int x = 5;
Expression <Func <int> > f = () => x;
Node constantNode = NaturalExpressionParser.Parse(f.Body);
Assert.AreEqual(new ConstantNode {
Text = "x", Value = "5"
}, constantNode);
}
public void PrintResults()
{
int x = 11;
int y = 6;
DateTime d = new DateTime(2010, 3, 1);
Expression<Func<bool>> expression = () => x + 5 == d.Month * y;
Node constantNode = NaturalExpressionParser.Parse(expression.Body);
string[] strings = NodeFormatter.Format(constantNode);
string s = string.Join(Environment.NewLine, strings);
Console.Out.WriteLine(s);
}
public void ParseEnumerableWithNulls()
{
var v = new List <int?> {
1, 2, null, 4
};
Expression <Func <List <int?> > > f = () => v;
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new ConstantNode()
{
Text = "v",
Value = "{1, 2, null, 4}"
};
Assert.AreEqual(expected, node);
}
public void ParseMethodWithException()
{
Expression <Func <int> > f = () => ThrowException();
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new MethodCallNode
{
Container = new ConstantNode {
Text = "PowerAssertTests.ParserTest"
},
MemberName = "ThrowException",
MemberValue = @"DivideByZeroException: Attempted to divide by zero.",
};
Assert.AreEqual(expected, node);
}
public void ParseMemberAccess()
{
DateTime d = new DateTime(2010, 12, 25);
Expression <Func <int> > f = () => d.Day;
MemberAccessNode node = (MemberAccessNode)NaturalExpressionParser.Parse(f.Body);
MemberAccessNode expected = new MemberAccessNode
{
Container = new ConstantNode {
Text = "d", Value = d.ToString()
},
MemberName = "Day",
MemberValue = "25"
};
Assert.AreEqual(expected, node);
}
public void ParseUnaryNegate()
{
var v = 5;
Expression <Func <int> > f = () => - v;
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new UnaryNode
{
Prefix = "-",
PrefixValue = "-5",
Operand = new ConstantNode()
{
Text = "v", Value = "5"
},
};
Assert.AreEqual(expected, node);
}
public void ParseUnaryNot()
{
var v = true;
Expression <Func <bool> > f = () => !v;
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new UnaryNode
{
Prefix = "!",
PrefixValue = "False",
Operand = new ConstantNode()
{
Text = "v", Value = "True"
},
};
Assert.AreEqual(expected, node);
}
public void ParseCast()
{
double x = 5.1;
Expression <Func <int> > f = () => (int)x;
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new UnaryNode
{
Prefix = "(int)(",
PrefixValue = "5",
Operand = new ConstantNode()
{
Text = "x", Value = 5.1M.ToString()
},
Suffix = ")"
};
Assert.AreEqual(expected, node);
}
public void ParseBinaryWithNullRightHandSide()
{
string rightHandSide = null;
Expression <Func <bool> > f = () => "foo" == rightHandSide;
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new BinaryNode
{
Left = new ConstantNode {
Text = "\"foo\""
},
Right = new ConstantNode {
Text = "rightHandSide", Value = "null"
},
Operator = "==",
Value = "False"
};
Assert.AreEqual(expected, node);
}
public void ParseConditional()
{
bool b = false;
Expression <Func <int> > f = () => b ? 1 : 2;
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new ConditionalNode
{
Condition = new ConstantNode {
Text = "b", Value = "False"
},
TrueValue = new ConstantNode {
Text = "1"
},
FalseValue = new ConstantNode {
Text = "2"
},
};
Assert.AreEqual(expected, node);
}
public void ParseIsOperator()
{
object x = "xValue";
Expression <Func <bool> > f = () => x is string;
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new BinaryNode()
{
Left = new ConstantNode()
{
Text = "x", Value = "\"xValue\""
},
Operator = "is",
Right = new ConstantNode()
{
Text = "string"
},
Value = "True"
};
Assert.AreEqual(expected, node);
}
public void ParseMethodAccess()
{
string s = "hello";
Expression <Func <string> > f = () => s.Substring(1);
var node = NaturalExpressionParser.Parse(f.Body);
var expected = new MethodCallNode
{
Container = new ConstantNode {
Text = "s", Value = @"""hello"""
},
MemberName = "Substring",
MemberValue = @"""ello""",
Parameters = new List <Node>()
{
new ConstantNode {
Text = "1"
}
}
};
Assert.AreEqual(expected, node);
}
public static string CreateSimpleFormatFor(LambdaExpression expression)
{
Node constantNode = NaturalExpressionParser.Parse(expression.Body);
return(NodeFormatter.SimpleFormat(constantNode));
}
