public void ParseHostedExpression()
{
IExpression expression = ParseExpression("at host x+y");
Assert.IsNotNull(expression);
Assert.IsInstanceOfType(expression, typeof(HostedExpression));
HostedExpression hexpr = (HostedExpression)expression;
Assert.IsInstanceOfType(hexpr.HostExpression, typeof(VariableExpression));
}
public void EvaluateHostedExpression()
{
Host host = new Host(new Machine());
Host host2 = new Host(new Machine(false));
host.Machine.Environment.SetValue("host", host2);
host2.Machine.Environment.SetValue("foo", "bar");
HostedExpression expression = new HostedExpression(new VariableExpression("foo"), new VariableExpression("host"));
object result = expression.Evaluate(host.Machine.Environment);
Assert.AreSame(Machine.Current, host.Machine);
Assert.AreEqual("bar", result);
Assert.IsNull(host.Machine.Environment.GetValue("foo"));
}