Add method that compresses next chunk of room (#64)

compressor_integration_tests/tests/auto_compressor_manager_tests.rs

@@ -0,0 +1,65 @@
+use auto_compressor::{
+    manager::run_compressor_on_room_chunk,
+    state_saving::{connect_to_database, create_tables_if_needed},
+};
+use compressor_integration_tests::{
+    add_contents_to_database, clear_compressor_state, database_collapsed_states_match_map,
+    database_structure_matches_map, empty_database,
+    map_builder::{compressed_3_3_from_0_to_13_with_state, line_segments_with_state},
+    setup_logger, DB_URL,
+};
+use serial_test::serial;
+use synapse_compress_state::Level;
+
+#[test]
+#[serial(db)]
+fn run_compressor_on_room_chunk_works() {
+    setup_logger();
+    // This starts with the following structure
+    //
+    // 0-1-2 3-4-5 6-7-8 9-10-11 12-13
+    //
+    // Each group i has state:
+    //     ('node','is',      i)
+    //     ('group',  j, 'seen') - for all j less than i
+    let initial = line_segments_with_state(0, 13);
+    empty_database();
+    add_contents_to_database("room1", &initial);
+
+    let mut client = connect_to_database(DB_URL).unwrap();
+    create_tables_if_needed(&mut client).unwrap();
+    clear_compressor_state();
+
+    // compress in 3,3 level sizes by default
+    let default_levels = vec![Level::restore(3, 0, None), Level::restore(3, 0, None)];
+
+    // compress the first 7 groups in the room
+    // structure should be the following afterwards
+    // (NOTE: only including compressed groups)
+    //
+    // 0  3\
+    // 1  4 6
+    // 2  5
+    run_compressor_on_room_chunk(DB_URL, "room1", 7, &default_levels).unwrap();
+
+    // compress the next 7 groups
+
+    run_compressor_on_room_chunk(DB_URL, "room1", 7, &default_levels).unwrap();
+
+    // This should have created the following structure in the database
+    // i.e. groups 6 and 9 should have changed from before
+    // N.B. this saves 11 rows
+    //
+    // 0  3\      12
+    // 1  4 6\    13
+    // 2  5 7 9
+    //      8 10
+    //        11
+    let expected = compressed_3_3_from_0_to_13_with_state();
+
+    // Check that the database still gives correct states for each group!
+    assert!(database_collapsed_states_match_map(&initial));
+
+    // Check that the structure of the database matches the expected structure
+    assert!(database_structure_matches_map(&expected));
+}

compressor_integration_tests/tests/compressor_continue_run_tests.rs

@@ -35,7 +35,7 @@ fn continue_run_called_twice_same_as_run() {
 
     // compress in 3,3 level sizes
     // since the compressor hasn't been run before they are empty
-    let level_info = vec![Level::restore(3, 0, None), Level::restore(3, 0, None)];
+    let level_info = vec![Level::new(3), Level::new(3)];
 
     // Run the compressor with those settings
     let chunk_stats_1 = continue_run(start, chunk_size, &db_url, &room_id, &level_info).unwrap();