Tests infrastructure for plume-models (#302)

First step for testing `plume-models`. I only added one test for the moment, but we should add more in future PRs.

plume-models/tests/lib.rs

@@ -0,0 +1,39 @@
+extern crate diesel;
+#[macro_use] extern crate diesel_migrations;
+
+extern crate plume_models;
+
+use diesel::Connection;
+use plume_models::{
+    Connection as Conn,
+    instance::*,
+    safe_string::SafeString,
+};
+
+embed_migrations!("../migrations/sqlite");
+
+fn db() -> Conn {
+    let conn = Conn::establish(":memory:").expect("Couldn't connect to the database");
+    embedded_migrations::run(&conn).expect("Couldn't run migrations");
+    conn
+}
+
+#[test]
+fn instance_insert() {
+    let conn = &db();
+    Instance::insert(conn, NewInstance {
+        default_license: "WTFPL".to_string(),
+        local: true,
+        long_description: SafeString::new("This is my instance."),
+        long_description_html: "<p>This is my instance</p>".to_string(),
+        short_description: SafeString::new("My instance."),
+        short_description_html: "<p>My instance</p>".to_string(),
+        name: "My instance".to_string(),
+        open_registrations: true,
+        public_domain: "plu.me".to_string(),
+    });
+    let inst = Instance::get_local(conn);
+    assert!(inst.is_some());
+    let inst = inst.unwrap();
+    assert_eq!(inst.name, "My instance".to_string());
+}