From 106d38d2352e6eac969d37c5b64756105d6b1a4e Mon Sep 17 00:00:00 2001
From: Timur Shemsedinov <timur.shemsedinov@gmail.com>
Date: Sun, 15 Mar 2020 03:03:49 +0200
Subject: [PATCH] Add recursive deadlock test

Refs: https://github.com/metarhia/web-locks/issues/7
PR-URL: https://github.com/metarhia/web-locks/pull/18
---
 test.js                    |  1 +
 test/recursive-deadlock.js | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 test/recursive-deadlock.js

diff --git a/test.js b/test.js
index e175e94..8f48423 100644
--- a/test.js
+++ b/test.js
@@ -6,6 +6,7 @@ const tests = [
   'steps',
   'exclusive',
   'deadlock',
+  'recursive-deadlock',
   'thread-main',
 ];
 
diff --git a/test/recursive-deadlock.js b/test/recursive-deadlock.js
new file mode 100644
index 0000000..5ca8dca
--- /dev/null
+++ b/test/recursive-deadlock.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const assert = require('assert').strict;
+
+const { locks } = require('..');
+
+const TEST_TIMEOUT = 100;
+
+module.exports = async () =>
+  new Promise(resolve => {
+    let flag1 = false;
+    let flag2 = false;
+
+    (async () => {
+      await locks.request('E', async () => {
+        flag1 = true;
+        await locks.request('E', async () => {
+          flag2 = true;
+        });
+      });
+    })();
+
+    (async () => {
+      setTimeout(() => {
+        assert.strictEqual(flag1, true);
+        assert.strictEqual(flag2, false);
+        resolve();
+      }, TEST_TIMEOUT);
+    })();
+  });