public void InappropriateExpressionType()
{
IQueryable <int> query = new EnumerableQuery <int>(Expression.Constant(Math.PI));
Assert.NotNull(query.Expression);
AssertExtensions.Throws <ArgumentException>(null, () => query.GetEnumerator());
}
public void NullExpressionAllowed()
{
IQueryable <int> query = new EnumerableQuery <int>((Expression)null);
Assert.Null(query.Expression);
Assert.Throws <ArgumentNullException>(() => query.GetEnumerator());
}
public void NullEnumerableConstantNullExpression()
{
IQueryable <int> query = new EnumerableQuery <int>((IEnumerable <int>)null);
var exp = (ConstantExpression)query.Expression;
Assert.Same(query, exp.Value);
Assert.Throws <InvalidOperationException>(() => query.GetEnumerator());
}