This is the types used to define the tests as pure data. See the
Tests.lhs module for the 'interpreter'.

> module Language.SQL.SimpleSQL.TestTypes where

> import Language.SQL.SimpleSQL.Syntax

> data TestItem = Group String [TestItem]
>               | TestValueExpr String ValueExpr
>               | TestQueryExpr String QueryExpr
>               | TestQueryExprs String [QueryExpr]

this just checks the sql parses without error, mostly just a
intermediate when I'm too lazy to write out the parsed AST. These
should all be TODO to convert to a testqueryexpr test.

>               | ParseQueryExpr String
>                 deriving (Eq,Show)