tree a34c9fbdd89af91f96d2959349eba02d1f450112
parent 37fe9cc1f553d96228b39d799a6d6cc45b0ee181
author Dave Borowitz <dborowitz@google.com> 1553289803 -0700
committer Dave Borowitz <dborowitz@google.com> 1553545694 -0700

QueryBuilder: Support : in field values

Prior to this change, "field:foo:bar" is parsed as "field:foo", silently
discarding the ":bar". Worse, "field:foo:bar baz:quux" is _also_ parsed
as "field:foo", discarding not just part of the first term but the
entire second term.

Fix this by treating "SINGLE_WORD ':' fieldValue" as a valid definition
of a field value, and add tests.

This solution seems inelegant in general; it seems like we should be
able to concatenate the tokens together into a single AST node at the
Antlr level. Also, it doesn't work in all cases: it fails to parse field
values ending in ':'

I'm far from an Antlr expert and there may be a better/easier way to do
this. But this change is still strictly better than it was before, and
it sets an example of how to write tests for parser functionality.

Change-Id: If275623b3244b02f81114fb2997ba16ee1492a4f