test(postgres): Add test for insert_machine and advance

Adds a test for the two most important functions in Finito's
PostgreSQL backend.

These actually require a local Postgres database to be available when
running. Currently the connection details are hardcoded in the test.

finito-postgres/src/lib.rs

@@ -13,6 +13,9 @@ extern crate serde;
 extern crate serde_json;
 extern crate uuid;
 
+#[cfg(test)] mod tests;
+#[cfg(test)] extern crate finito_door;
+
 mod error;
 pub use error::{Result, Error};
 

finito-postgres/src/tests.rs

@@ -0,0 +1,47 @@
+use super::*;
+use finito;
+use finito_door::*;
+use postgres::{Connection, TlsMode};
+
+// TODO: read config from environment
+fn open_test_connection() -> Connection {
+    Connection::connect("postgres://finito:finito@localhost/finito", TlsMode::None)
+        .expect("Failed to connect to test database")
+}
+
+#[test]
+fn test_insert_machine() {
+    let conn = open_test_connection();
+    let initial = DoorState::Opened;
+    let door = insert_machine(&conn, initial).expect("Failed to insert door");
+    let result = get_machine(&conn, &door, false).expect("Failed to fetch door");
+
+    assert_eq!(result, DoorState::Opened, "Inserted door state should match");
+}
+
+#[test]
+fn test_advance() {
+    let conn = open_test_connection();
+
+    let initial = DoorState::Opened;
+    let events = vec![
+        DoorEvent::Close,
+        DoorEvent::Open,
+        DoorEvent::Close,
+        DoorEvent::Lock(1234),
+        DoorEvent::Unlock(1234),
+        DoorEvent::Lock(4567),
+        DoorEvent::Unlock(1234),
+    ];
+
+    let door = insert_machine(&conn, initial).expect("Failed to insert door");
+
+    for event in events {
+        advance(&conn, &door, event).expect("Failed to advance door FSM");
+    }
+
+    let result = get_machine(&conn, &door, false).expect("Failed to fetch door");
+    let expected = DoorState::Locked { code: 4567, attempts: 2 };
+
+    assert_eq!(result, expected, "Advanced door state should match");
+}