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-rw-r--r--tests/storage/test_id_generators.py25
1 files changed, 16 insertions, 9 deletions
diff --git a/tests/storage/test_id_generators.py b/tests/storage/test_id_generators.py
index 392b08832b..cc0612cf65 100644
--- a/tests/storage/test_id_generators.py
+++ b/tests/storage/test_id_generators.py
@@ -199,10 +199,17 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase):
         first_id_gen = self._create_id_generator("first", writers=["first", "second"])
         second_id_gen = self._create_id_generator("second", writers=["first", "second"])
 
-        self.assertEqual(first_id_gen.get_positions(), {"first": 3, "second": 7})
-        self.assertEqual(first_id_gen.get_current_token_for_writer("first"), 3)
+        # The first ID gen will notice that it can advance its token to 7 as it
+        # has no in progress writes...
+        self.assertEqual(first_id_gen.get_positions(), {"first": 7, "second": 7})
+        self.assertEqual(first_id_gen.get_current_token_for_writer("first"), 7)
         self.assertEqual(first_id_gen.get_current_token_for_writer("second"), 7)
 
+        # ... but the second ID gen doesn't know that.
+        self.assertEqual(second_id_gen.get_positions(), {"first": 3, "second": 7})
+        self.assertEqual(second_id_gen.get_current_token_for_writer("first"), 3)
+        self.assertEqual(second_id_gen.get_current_token_for_writer("second"), 7)
+
         # Try allocating a new ID gen and check that we only see position
         # advanced after we leave the context manager.
 
@@ -211,7 +218,7 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase):
                 self.assertEqual(stream_id, 8)
 
                 self.assertEqual(
-                    first_id_gen.get_positions(), {"first": 3, "second": 7}
+                    first_id_gen.get_positions(), {"first": 7, "second": 7}
                 )
 
         self.get_success(_get_next_async())
@@ -279,7 +286,7 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase):
         self._insert_row_with_id("first", 3)
         self._insert_row_with_id("second", 5)
 
-        id_gen = self._create_id_generator("first", writers=["first", "second"])
+        id_gen = self._create_id_generator("worker", writers=["first", "second"])
 
         self.assertEqual(id_gen.get_positions(), {"first": 3, "second": 5})
 
@@ -319,14 +326,14 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase):
 
         id_gen = self._create_id_generator("first", writers=["first", "second"])
 
-        self.assertEqual(id_gen.get_positions(), {"first": 3, "second": 5})
+        self.assertEqual(id_gen.get_positions(), {"first": 5, "second": 5})
 
-        self.assertEqual(id_gen.get_persisted_upto_position(), 3)
+        self.assertEqual(id_gen.get_persisted_upto_position(), 5)
 
         async def _get_next_async():
             async with id_gen.get_next() as stream_id:
                 self.assertEqual(stream_id, 6)
-                self.assertEqual(id_gen.get_persisted_upto_position(), 3)
+                self.assertEqual(id_gen.get_persisted_upto_position(), 5)
 
         self.get_success(_get_next_async())
 
@@ -388,7 +395,7 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase):
         self._insert_row_with_id("second", 5)
 
         # Initial config has two writers
-        id_gen = self._create_id_generator("first", writers=["first", "second"])
+        id_gen = self._create_id_generator("worker", writers=["first", "second"])
         self.assertEqual(id_gen.get_persisted_upto_position(), 3)
         self.assertEqual(id_gen.get_current_token_for_writer("first"), 3)
         self.assertEqual(id_gen.get_current_token_for_writer("second"), 5)
@@ -568,7 +575,7 @@ class BackwardsMultiWriterIdGeneratorTestCase(HomeserverTestCase):
 
         self.get_success(_get_next_async2())
 
-        self.assertEqual(id_gen_1.get_positions(), {"first": -1, "second": -2})
+        self.assertEqual(id_gen_1.get_positions(), {"first": -2, "second": -2})
         self.assertEqual(id_gen_2.get_positions(), {"first": -1, "second": -2})
         self.assertEqual(id_gen_1.get_persisted_upto_position(), -2)
         self.assertEqual(id_gen_2.get_persisted_upto_position(), -2)