first broken test for purge of search tokens

tests/test_sql.py

@@ -1183,6 +1183,38 @@ def test_sql_criteria_fts(pub):
     assert data_class.select([st.FtsMatch(formdata1.id_display)])[0].id_display == formdata1.id_display
 
 
+def test_search_tokens_purge(pub):
+    conn, cur = sql.get_connection_and_cursor()
+
+    test_formdef = FormDef()
+    test_formdef.name = 'table select fts'
+    test_formdef.fields = [fields.StringField(id='3', label='string')]
+    test_formdef.store()
+    data_class = test_formdef.data_class(mode='sql')
+
+    cur.execute("SELECT count(*) FROM wcs_search_tokens;")
+    assert cur.fetchone()[0] == 42
+
+    t = data_class()
+    t.data = {'3': 'foo'}
+    t.just_created()
+    t.store()
+
+    cur.execute("SELECT count(*) FROM wcs_search_tokens;")
+    assert cur.fetchone()[0] == 42+1
+
+    t.data = {'3': 'chaussette'}
+    t.store()
+
+    cur.execute("SELECT count(*) FROM wcs_search_tokens;")
+    assert cur.fetchone()[0] == 73
+
+    sql.purge_obsolete_search_tokens()
+
+    cur.execute("SELECT count(*) FROM wcs_search_tokens;")
+    assert cur.fetchone()[0] == 42
+
+
 def table_exists(cur, table_name):
     cur.execute(
         '''SELECT COUNT(*) FROM information_schema.tables