public virtual void TestPrepend()
{
Collection4 c = new Collection4();
c.Prepend("foo");
AssertCollection(new string[] { "foo" }, c);
c.Add("bar");
AssertCollection(new string[] { "foo", "bar" }, c);
c.Prepend("baz");
AssertCollection(new string[] { "baz", "foo", "bar" }, c);
c.Prepend("gazonk");
AssertCollection(new string[] { "gazonk", "baz", "foo", "bar" }, c);
}
private Collection4 FieldPathFromTop()
{
var q = this;
var fieldPath = new Collection4();
while (q.i_parent != null)
{
fieldPath.Prepend(q.i_field);
q = q.i_parent;
}
return fieldPath;
}
public virtual void TestNulls()
{
Collection4 c = new Collection4();
c.Add("one");
AssertNotContainsNull(c);
c.Add(null);
AssertContainsNull(c);
AssertCollection(new string[] { "one", null }, c);
c.Prepend(null);
AssertCollection(new string[] { null, "one", null }, c);
c.Prepend("zero");
c.Add("two");
AssertCollection(new string[] { "zero", null, "one", null, "two" }, c);
AssertContainsNull(c);
c.Remove(null);
AssertCollection(new string[] { "zero", "one", null, "two" }, c);
c.Remove(null);
AssertNotContainsNull(c);
AssertCollection(new string[] { "zero", "one", "two" }, c);
c.Remove(null);
AssertCollection(new string[] { "zero", "one", "two" }, c);
}
private IEnumerator FieldNames(FieldValue fieldValue)
{
Collection4 coll = new Collection4();
IComparisonOperand curOp = fieldValue;
while (curOp is FieldValue)
{
FieldValue curField = (FieldValue)curOp;
coll.Prepend(curField.FieldName());
curOp = curField.Parent();
}
return coll.GetEnumerator();
}
