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--");
    });
  });
});