From 92ddddc29edd9dc7eb7eef556211f4a06eca7754 Mon Sep 17 00:00:00 2001
From: Trevor Settles <roboteng@gmail.com>
Date: Thu, 7 Dec 2023 20:16:00 -0700
Subject: [PATCH] feat: failed acceptance test in the expected way

---
 src/lib.rs | 50 +++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 41 insertions(+), 9 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index d453b8c..4254f5c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,27 +1,59 @@
 use bevy::prelude::*;
 
-struct BasePlugin;
-impl Plugin for BasePlugin {
-    fn build(&self, _app: &mut App) {
-        //app.;
-    }
-}
-
 struct CoreLogicPlugin;
 impl Plugin for CoreLogicPlugin {
     fn build(&self, app: &mut App) {
-        // app.;
+        app.add_event::<SpawnUnit>();
+
+        app.add_systems(Update, foo);
     }
 }
 
+fn foo(mut creations: EventReader<SpawnUnit>, mut commands: Commands) {
+    for spawn in creations.read() {
+        match spawn {
+            SpawnUnit::Villager(entity, pos) => commands.entity(*entity).insert(Transform {
+                translation: Vec3::new(pos.x, pos.y, 0.0),
+                ..Default::default()
+            }),
+        };
+    }
+}
+
+#[derive(Debug, Event)]
+enum SpawnUnit {
+    Villager(Entity, Vec2),
+}
+
+#[derive(Debug, Event)]
+enum PlayerCommand {
+    Move(Entity, Vec2),
+}
+
 #[cfg(test)]
 mod test {
     use super::*;
 
     #[test]
     fn move_a_villager() {
+        // arrange
         let mut app = App::new();
 
-        app.add_plugins((MinimalPlugins, BasePlugin, CoreLogicPlugin));
+        app.add_plugins((MinimalPlugins, CoreLogicPlugin));
+
+        let ent = app.world.spawn_empty().id();
+
+        let init_pos = Vec2::new(1.0, 1.0);
+        app.world.send_event(SpawnUnit::Villager(ent, init_pos));
+
+        // act
+        let goal_pos = Vec2::new(0.0, 0.0);
+        app.world.send_event(PlayerCommand::Move(ent, goal_pos));
+        app.update();
+
+        // assert
+        // Within 5 seconds, the villager should be closer than where it started
+        let actual = app.world.get::<Transform>(ent).unwrap();
+        assert!(init_pos.length() > actual.translation.length());
     }
 }