fix: re-enable power monitor test (#14458)

* fix: re-enable power monitor test

* update test for correct return type

* fix: mocha 'after' hook of dbus powerMonitor test

spec/api-power-monitor-spec.js

@@ -16,8 +16,7 @@ chai.use(dirtyChai)
 
 const skip = process.platform !== 'linux' || !process.env.DBUS_SYSTEM_BUS_ADDRESS
 
-// TODO(alexeykuzmin): [Ch66] Crashes on Linux ia32. Fix it and enable back.
-xdescribe('powerMonitor', () => {
+describe('powerMonitor', () => {
   let logindMock, dbusMockPowerMonitor, getCalls, emitSignal, reset
 
   if (!skip) {
@@ -31,7 +30,9 @@ xdescribe('powerMonitor', () => {
       reset = Promise.promisify(logindMock.Reset, {context: logindMock})
     })
 
-    after(reset)
+    after(async () => {
+      await reset()
+    })
   }
 
   (skip ? describe.skip : describe)('when powerMonitor module is loaded with dbus mock', () => {
@@ -130,7 +131,7 @@ xdescribe('powerMonitor', () => {
     describe('powerMonitor.querySystemIdleState', () => {
       it('notify current system idle state', done => {
         powerMonitor.querySystemIdleState(1, idleState => {
-          expect(idleState).to.be.true()
+          expect(idleState).to.equal('idle')
           done()
         })
       })