Adds missing changes from 2379da96e4.

wagtail/wagtailsearch/tests/test_backends.py

@@ -178,6 +178,27 @@ class BackendTests(WagtailTestUtils):
         results = self.backend.search("A subobject", models.SearchTest)
         self.assertEqual(set(results), {self.testa})
 
+    def test_boost(self):
+        results = self.backend.search('Hello', models.SearchTest)
+        # The `content` field has more boost, so the object containing “Hello”
+        # should be before the ones having it in the title,
+        # despite the insertion order.
+        self.assertListEqual(
+            list(results), [self.testc.searchtest_ptr, self.testa, self.testb])
+
+    def test_order_by_relevance(self):
+        sorted_results = self.backend.search('Hello', models.SearchTest,
+                                             order_by_relevance=True)
+        self.assertListEqual(
+            list(sorted_results),
+            [self.testc.searchtest_ptr, self.testa, self.testb])
+
+        unsorted_results = self.backend.search('Hello', models.SearchTest,
+                                               order_by_relevance=False)
+        self.assertListEqual(
+            list(unsorted_results),
+            [self.testa, self.testb, self.testc.searchtest_ptr])
+
     def test_delete(self):
         # Delete one of the objects
         self.backend.delete(self.testa)