fix postgresl-fts indexer: get_indexer reported not implemented

When I implemented postgresql fts indexing I forgot to remove code
that raised NotImplemented when it was requested. Also had to fix
import to match filename.

Added tests for native-fts paths in get_indexer.

Author: rouilj

CHANGES.txt

@@ -38,6 +38,8 @@ Fixed:
   catching SSL.ZeroReturnError indicating SSL has been shut down.
 - add caching header for text/javascript in addition to depricated
   application/javascript. (John Rouillard)
+- Enable postgres-fts: fix indexer-common::get_indexer so it returns a
+  postgresql-fts Test code paths in get_indexer. (John Rouillard)
 
 Features:
 

roundup/backends/indexer_common.py

@@ -147,8 +147,7 @@ def get_indexer(config, db):
             return Indexer(db)
 
         if db.dbtype == "postgres":
-            raise NotImplementedError("Postgres FTS not available")
-            from roundup.backends.indexer_postgres_fts import Indexer
+            from roundup.backends.indexer_postgresql_fts import Indexer
             return Indexer(db)
 
     if indexer_name == "native":

test/test_indexer.py

@@ -241,6 +241,27 @@ def tearDown(self):
         RDBMSIndexerTest.tearDown(self)
         postgresqlOpener.tearDown(self)
 
+    def test_get_indexer(self):
+        def class_name_of(object):
+            """ take and object and return just the class name.
+                So in:
+
+                return the class name before "at".
+
+            """
+            return(str(object).split()[0])
+
+        from roundup.backends.indexer_common import get_indexer
+        old_indexer = self.db.config['INDEXER']
+        self.db.config['INDEXER'] = 'native-fts'
+
+        get_indexer(self.db.config, self.db)
+
+        self.assertEqual(class_name_of(self.dex),
+              class_name_of(get_indexer(self.db.config, self.db)))
+
+        self.db.config['INDEXER'] = old_indexer
+
     def test_websearch_syntax(self):
         """Test searches using websearch_to_tsquery. These never throw
            errors regardless of how wacky the input.
@@ -456,6 +477,27 @@ def setUp(self):
         self.dex = Indexer(self.db)
         self.dex.db = self.db
 
+    def test_get_indexer(self):
+        def class_name_of(object):
+            """ take and object and return just the class name.
+                So in:
+
+                return the class name before "at".
+
+            """
+            return(str(object).split()[0])
+
+        from roundup.backends.indexer_common import get_indexer
+        old_indexer = 'native-fts'
+        self.db.config['INDEXER'] = 'native-fts'
+
+        get_indexer(self.db.config, self.db)
+
+        self.assertEqual(class_name_of(self.dex),
+              class_name_of(get_indexer(self.db.config, self.db)))
+
+        self.db.config['INDEXER'] = old_indexer
+
     def test_phrase_and_near(self):
         self.dex.add_text(('test', '1', 'foo'), 'a the hello world')
         self.dex.add_text(('test', '2', 'foo'), 'helh blah blah the world')