src/node/test/health_test.js

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 *
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'use strict';

var assert = require('assert');

var health = require('../health_check/health.js');

var grpc = require('../');

describe('Health Checking', function() {
  var statusMap = {
    '': 'SERVING',
    'grpc.test.TestServiceNotServing': 'NOT_SERVING',
    'grpc.test.TestServiceServing': 'SERVING'
  };
  var healthServer;
  var healthImpl;
  var healthClient;
  before(function() {
    healthServer = new grpc.Server();
    healthImpl = new health.Implementation(statusMap);
    healthServer.addProtoService(health.service, healthImpl);
    var port_num = healthServer.bind('0.0.0.0:0',
                                     grpc.ServerCredentials.createInsecure());
    healthServer.start();
    healthClient = new health.Client('localhost:' + port_num,
                                     grpc.credentials.createInsecure());
  });
  after(function() {
    healthServer.forceShutdown();
  });
  it('should say an enabled service is SERVING', function(done) {
    healthClient.check({service: ''}, function(err, response) {
      assert.ifError(err);
      assert.strictEqual(response.status, 'SERVING');
      done();
    });
  });
  it('should say that a disabled service is NOT_SERVING', function(done) {
    healthClient.check({service: 'grpc.test.TestServiceNotServing'},
                       function(err, response) {
                         assert.ifError(err);
                         assert.strictEqual(response.status, 'NOT_SERVING');
                         done();
                       });
  });
  it('should say that an enabled service is SERVING', function(done) {
    healthClient.check({service: 'grpc.test.TestServiceServing'},
                       function(err, response) {
                         assert.ifError(err);
                         assert.strictEqual(response.status, 'SERVING');
                         done();
                       });
  });
  it('should get NOT_FOUND if the service is not registered', function(done) {
    healthClient.check({service: 'not_registered'}, function(err, response) {
      assert(err);
      assert.strictEqual(err.code, grpc.status.NOT_FOUND);
      done();
    });
  });
  it('should get a different response if the status changes', function(done) {
    healthClient.check({service: 'transient'}, function(err, response) {
      assert(err);
      assert.strictEqual(err.code, grpc.status.NOT_FOUND);
      healthImpl.setStatus('transient', 'SERVING');
      healthClient.check({service: 'transient'}, function(err, response) {
        assert.ifError(err);
        assert.strictEqual(response.status, 'SERVING');
        done();
      });
    });
  });
});