fix: re-enable power monitor test (#14496)

spec/api-power-monitor-spec.js

@@ -12,8 +12,7 @@ const Promise = require('bluebird')
 
 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) {
@@ -128,7 +127,7 @@ xdescribe('powerMonitor', () => {
     describe('powerMonitor.querySystemIdleState', () => {
       it('notify current system idle state', (done) => {
         powerMonitor.querySystemIdleState(1, (idleState) => {
-          assert.ok(idleState)
+          assert.equal(idleState, 'idle')
           done()
         })
       })