fix: pingTimer test check correct timerId prop

DEVELOPMENT.md

@@ -19,6 +19,11 @@ npm test
 
 This will run both `browser` and `node` tests.
 
+
+### Running specific tests
+
+For example, you can run `node -r esbuild-register --test test/pingTimer.ts`
+
 ### Browser
 
 Browser tests use [`wtr`](https://modern-web.dev/docs/test-runner/overview/) as the test runner. To build browser bundle using [esbuild](https://esbuild.github.io/) and run browser tests, you can use the following command:

test/pingTimer.ts

@@ -18,7 +18,7 @@ describe('PingTimer', () => {
 		const cb = spy()
 		const pingTimer = new PingTimer(keepalive, cb, 'auto')
 
-		assert.ok(pingTimer['timer'], 'timer should be created automatically')
+		assert.ok(pingTimer['timerId'], 'timer should be created automatically')
 
 		clock.tick(keepalive * 1000 + 1)
 		assert.equal(
@@ -29,7 +29,10 @@ describe('PingTimer', () => {
 		clock.tick(keepalive * 1000 + 1)
 		assert.equal(cb.callCount, 2, 'should reschedule automatically')
 		pingTimer.clear()
-		assert.ok(!pingTimer['timer'], 'timer should not exists after clear()')
+		assert.ok(
+			!pingTimer['timerId'],
+			'timer should not exists after clear()',
+		)
 	})
 
 	it('should not re-schedule if timer has been cleared in check ping', () => {
@@ -52,6 +55,6 @@ describe('PingTimer', () => {
 		)
 		clock.tick(keepalive * 1000 + 1)
 		assert.equal(cb.callCount, 1, 'should not re-schedule')
-		assert.ok(!pingTimer['timer'], 'timer should not exists')
+		assert.ok(!pingTimer['timerId'], 'timer should not exists')
 	})
 })