public void ParseTwoExpressions()
{
ModelParser parser = new ModelParser("x do. y do");
IEnumerable<IExpression> expressions = parser.ParseExpressions();
Assert.IsNotNull(expressions);
Assert.AreEqual(2, expressions.Count());
Assert.AreEqual("x do", expressions.First().AsString());
Assert.AreEqual("y do", expressions.Skip(1).First().AsString());
}