2 files changed, 49 insertions, 2 deletions
diff --git a/src/simulation/actions.js b/src/simulation/actions.js
index a925867..aaaf1d8 100644
--- a/src/simulation/actions.js
+++ b/src/simulation/actions.js
@@ -60,9 +60,26 @@ const turn_left = {
 };
 
 
+const turn_right = {
+  size: 1,
+  propose: (agent, head) => {
+    if (head[0] > threshold) {
+      const orientation = { n: 'e', e: 's', s: 'w', w: 'n' }[agent.flags.orientation];
+      return [{
+        agent_changes: [{
+          agent_id: agent.id,
+          flags: { orientation },
+        }],
+      }];
+    } else {
+      return [];
+    }
+  },
+};
+
 
 
 
 export const actions = [
-  move_forward, move_backward, turn_left,
+  move_forward, move_backward, turn_left, turn_right,
 ];
diff --git a/src/simulation/actions.test.js b/src/simulation/actions.test.js
index 457015d..d039f8a 100644
--- a/src/simulation/actions.test.js
+++ b/src/simulation/actions.test.js
@@ -3,7 +3,11 @@
 import { actions } from './actions.js';
 
 
-const [move_forward, move_backward, turn_left, ...rest] = actions;
+const [
+  move_forward, move_backward, 
+  turn_left, turn_right,
+  ...rest
+] = actions;
 
 
 test("move forward", () => {
@@ -84,3 +88,29 @@ test("turn_left", () => {
 });
 
 
+test("turn_right", () => {
+  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
+  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
+  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
+  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };
+
+  expect(turn_right.propose(n, [1])).toEqual([
+    { agent_changes: [{ agent_id: 0, flags: { orientation: 'e' } }] },
+  ]);
+  expect(turn_right.propose(s, [1])).toEqual([
+    { agent_changes: [{ agent_id: 0, flags: { orientation: 'w' } }] },
+  ]);
+  expect(turn_right.propose(e, [1])).toEqual([
+    { agent_changes: [{ agent_id: 0, flags: { orientation: 's' } }] },
+  ]);
+  expect(turn_right.propose(w, [1])).toEqual([
+    { agent_changes: [{ agent_id: 0, flags: { orientation: 'n' } }] },
+  ]);
+
+  expect(turn_right.propose(n, [0])).toEqual([]);
+  expect(turn_right.propose(s, [-1])).toEqual([]);
+  expect(turn_right.propose(e, [0])).toEqual([]);
+  expect(turn_right.propose(w, [-1])).toEqual([]);
+});
+
+