import {describe, beforeEach, it, expect, angularMocks} from 'test/lib/common';
import config from 'app/core/config';
import 'app/features/plugins/datasource_srv';

describe('datasource_srv', function() {
  var _datasourceSrv;
  var metricSources;
  var templateSrv = {};

  beforeEach(angularMocks.module('grafana.core'));
  beforeEach(angularMocks.module(function($provide) {
    $provide.value('templateSrv', templateSrv);
  }));
  beforeEach(angularMocks.module('grafana.services'));
  beforeEach(angularMocks.inject(function(datasourceSrv) {
    _datasourceSrv = datasourceSrv;
  }));

  describe('when loading metric sources', function() {
    var unsortedDatasources = {
      'mmm': {
        type: 'test-db',
        meta: { metrics: {m: 1} }
      },
      '--Grafana--': {
        type: 'grafana',
        meta: {builtIn: true, metrics: {m: 1}, id: "grafana"}
      },
      '--Mixed--': {
        type: 'test-db',
        meta: {builtIn: true, metrics: {m: 1}, id: "mixed"}
      },
      'ZZZ': {
        type: 'test-db',
        meta: {metrics: {m: 1} }
      },
      'aaa': {
        type: 'test-db',
        meta: { metrics: {m: 1} }
      },
      'BBB': {
        type: 'test-db',
        meta: { metrics: {m: 1} }
      },
    };
    beforeEach(function() {
      config.datasources = unsortedDatasources;
      metricSources = _datasourceSrv.getMetricSources({skipVariables: true});
    });

    it('should return a list of sources sorted case insensitively with builtin sources last', function() {
      expect(metricSources[0].name).to.be('aaa');
      expect(metricSources[1].name).to.be('BBB');
      expect(metricSources[2].name).to.be('mmm');
      expect(metricSources[3].name).to.be('ZZZ');
      expect(metricSources[4].name).to.be('--Grafana--');
      expect(metricSources[5].name).to.be('--Mixed--');
    });
  });
});