From 25bca132659896dc1779fd55300d7725f3786fc0 Mon Sep 17 00:00:00 2001
From: Dmitriy Pleshevskiy <dmitriy@ideascup.me>
Date: Fri, 20 Aug 2021 11:01:53 +0300
Subject: [PATCH] chore: add test that reused one builder

---
 fsm.test.ts | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/fsm.test.ts b/fsm.test.ts
index 7ecfa60..6e2a2ef 100644
--- a/fsm.test.ts
+++ b/fsm.test.ts
@@ -160,3 +160,27 @@ Deno.test("should throw error if beforeExit action returns false", () => {
     `cannot change state from "${ProjectStatus.Pending}" to "${ProjectStatus.Active}"`,
   );
 });
+
+Deno.test("should reuse one builder for many entities", () => {
+  const statuses = Object.values(ProjectStatus);
+  const transitions: Array<[string, Array<string>]> = [
+    [ProjectStatus.Pending, [ProjectStatus.Active, ProjectStatus.Archived]],
+    [ProjectStatus.Active, [ProjectStatus.Completed]],
+  ];
+
+  const smb = new fsm.StateMachineBuilder()
+    .withStates(statuses)
+    .withTransitions(transitions);
+
+  function expectedAllowedStates(status: ProjectStatus) {
+    return transitions.find(([s]) => s === status)?.[1] || [];
+  }
+
+  for (const status of statuses) {
+    const sm = smb.build(status);
+    assertEquals(
+      sm.allowedTransitionStates().map(String),
+      expectedAllowedStates(status),
+    );
+  }
+});