Adds all three test cases for bag of words.

server/tests/routes/api/autocomplete_test.py

@@ -67,7 +67,21 @@ def mock_predict_effect(query, lang):
     response_dict = json.loads(response.data.decode("utf-8"))
     self.assertEqual(len(response_dict["predictions"]), 5)
 
-  def test_off_by_one_true(self):
-    text = "Hello"
-    off_by_one_text = "Hallo"
-    self.assertTrue(helpers.off_by_one_letter(text, off_by_one_text))
+  # Tests for helpers within autocomplete.
+  def test_bag_of_words_same(self):
+    """Tests that bag of words passes for same letters."""
+    text = "San"
+    reordered_text = "Sna"
+    self.assertTrue(helpers.off_by_one_letter(text, reordered_text))
+
+  def test_bag_of_words_off_by_one(self):
+    """Tests that bag of words passes when off by one."""
+    text = "Diego"
+    off_by_one_text = "Digo"
+    self.assertTrue(helpers.off_by_one_letter(text, off_by_one_text))
+
+  def test_bag_of_words_off_by_two(self):
+    """Tests that bag of words passes when off by two."""
+    text = "Diego"
+    off_by_one_text = "Diaga"
+    self.assertFalse(helpers.off_by_one_letter(text, off_by_one_text))