Setup framework to do integration testing (#50)

compressor_integration_tests/tests/compressor_config_tests.rs

@@ -0,0 +1,55 @@
+use compressor_integration_tests::{
+    add_contents_to_database, empty_database, map_builder::line_with_state, DB_URL,
+};
+use serial_test::serial;
+use synapse_compress_state::{run, Config};
+
+// Remember to add #[serial(db)] before any test that access the database.
+// Only one test with this annotation can run at once - preventing
+// concurrency bugs.
+//
+// You will probably also want to use common::empty_database() at the start
+// of each test as well (since their order of execution is not guaranteed)
+
+#[test]
+#[serial(db)]
+fn run_succeeds_without_crashing() {
+    // 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_with_state(0, 13);
+
+    empty_database();
+    add_contents_to_database("room1", &initial);
+
+    let db_url = DB_URL.to_string();
+    let room_id = "room1".to_string();
+    let output_file = Some("./tests/tmp/run_succeeds_without_crashing.sql".to_string());
+    let min_state_group = None;
+    let groups_to_compress = None;
+    let min_saved_rows = None;
+    let max_state_group = None;
+    let level_sizes = "3,3".to_string();
+    let transactions = true;
+    let graphs = false;
+
+    let config = Config::new(
+        db_url.clone(),
+        room_id.clone(),
+        output_file,
+        min_state_group,
+        groups_to_compress,
+        min_saved_rows,
+        max_state_group,
+        level_sizes,
+        transactions,
+        graphs,
+    )
+    .unwrap();
+
+    run(config);
+}