public void UpdateExpression()
{
var expression = ParseExpression <UpdateExpression>("x++");
var visitor = new AstVisitorEventSource();
UpdateExpression updateExpression = null;
Identifier argument = null;
visitor.VisitingUpdateExpression += (_, arg) => updateExpression = arg;
visitor.VisitedIdentifier += (_, arg) => argument = arg;
visitor.Visit(expression);
Assert.Same(expression, updateExpression);
Assert.Same(expression.Argument, argument);
}
public void MemberExpression()
{
var expression = ParseExpression <MemberExpression>("foo.bar");
var visitor = new AstVisitorEventSource();
MemberExpression memberExpression = null;
var identifiers = new System.Collections.Generic.List <Identifier>();
visitor.VisitingMemberExpression += (_, arg) => memberExpression = arg;
visitor.VisitedIdentifier += (_, arg) => identifiers.Add(arg);
visitor.Visit(expression);
Assert.Same(expression, memberExpression);
Assert.Equal(2, identifiers.Count);
Assert.Same(expression.Object, identifiers[0]);
Assert.Same(expression.Property, identifiers[1]);
}
public void Property()
{
var expression = ParseExpression <ObjectExpression>("{ x: 42 }");
var visitor = new AstVisitorEventSource();
Property property = null;
Identifier key = null;
Literal value = null;
visitor.VisitingProperty += (_, arg) => property = arg;
visitor.VisitedIdentifier += (_, arg) => key = arg;
visitor.VisitedLiteral += (_, arg) => value = arg;
visitor.Visit(expression);
var expectedProperty = expression.Properties.Single().As <Property>();
Assert.Same(expectedProperty, property);
Assert.Same(expectedProperty.Key, key);
Assert.Same(expectedProperty.Value, value);
}
