Fix BooleanIndex to filter out missing documents, refs #28.

CHANGES.rst

@@ -4,6 +4,9 @@ Changelog
 3.2.1 (unreleased)
 ------------------
 
+- Fix a bug in the BooleanIndex where documents without an entry in
+  the index were not being filtered out in all queries.
+
 - #19: Fix stale cache results after clearing an index.
 
 3.2 (2016-07-18)

buildout.cfg

@@ -6,6 +6,7 @@ parts = interpreter test
 
 [versions]
 Products.ZCatalog =
+five.globalrequest = < 99.0.dev
 
 [interpreter]
 recipe = zc.recipe.egg

src/Products/PluginIndexes/BooleanIndex/BooleanIndex.py

@@ -237,7 +237,9 @@ def _apply_index(self, request, resultset=None):
                     return (union(difference(self._unindex, index), IISet([])),
                             (self.id, ))
                 else:
-                    return (difference(resultset, index), (self.id, ))
+                    return (intersection(difference(resultset, index),
+                                         self._unindex),
+                            (self.id, ))
         return (IISet(), (self.id, ))
 
     def indexSize(self):

src/Products/PluginIndexes/BooleanIndex/tests.py

@@ -103,6 +103,14 @@ def test_search_inputresult(self):
         self.assertEqual(idx, ('truth', ))
         self.assertEqual(list(res), [2])
 
+        res, idx = index._apply_index({'truth': True},
+                                      resultset=IISet([1, 2, 99]))
+        self.assertEqual(list(res), [1])
+
+        res, idx = index._apply_index({'truth': False},
+                                      resultset=IISet([1, 2, 99]))
+        self.assertEqual(list(res), [2])
+
     def test_index_many_true(self):
         index = self._makeOne()
         for i in range(0, 100):