grafana/public/app/plugins/datasource/cloud-monitoring/components/VariableQueryEditor.test.tsx

import React from 'react';
// @ts-ignore
import renderer from 'react-test-renderer';
import { CloudMonitoringVariableQueryEditor, Props } from './VariableQueryEditor';
import { CloudMonitoringVariableQuery, MetricFindQueryTypes } from '../types';
import CloudMonitoringDatasource from '../datasource';
import { VariableModel } from '@grafana/data';

jest.mock('../functions', () => ({
  getMetricTypes: (): any => ({ metricTypes: [], selectedMetricType: '' }),
  extractServicesFromMetricDescriptors: (): any[] => [],
}));

jest.mock('@grafana/runtime', () => {
  const original = jest.requireActual('@grafana/runtime');
  return {
    ...original,
    getTemplateSrv: () => ({
      replace: (s: string) => s,
      getVariables: () => ([] as unknown) as VariableModel[],
    }),
  };
});

const props: Props = {
  onChange: query => {},
  query: ({} as unknown) as CloudMonitoringVariableQuery,
  datasource: ({
    getDefaultProject: () => '',
    getProjects: async () => Promise.resolve([]),
    getMetricTypes: async (projectName: string) => Promise.resolve([]),
    getSLOServices: async (projectName: string) => Promise.resolve([]),
    getServiceLevelObjectives: (projectName: string, serviceId: string) => Promise.resolve([]),
  } as unknown) as CloudMonitoringDatasource,
  onRunQuery: () => {},
};

describe('VariableQueryEditor', () => {
  it('renders correctly', () => {
    const tree = renderer.create(<CloudMonitoringVariableQueryEditor {...props} />).toJSON();
    expect(tree).toMatchSnapshot();
  });

  describe('and a new variable is created', () => {
    it('should trigger a query using the first query type in the array', done => {
      props.onChange = query => {
        expect(query.selectedQueryType).toBe('projects');
        done();
      };
      renderer.create(<CloudMonitoringVariableQueryEditor {...props} />).toJSON();
    });
  });

  describe('and an existing variable is edited', () => {
    it('should trigger new query using the saved query type', done => {
      props.query = ({ selectedQueryType: MetricFindQueryTypes.LabelKeys } as unknown) as CloudMonitoringVariableQuery;
      props.onChange = query => {
        expect(query.selectedQueryType).toBe('labelKeys');
        done();
      };
      renderer.create(<CloudMonitoringVariableQueryEditor {...props} />).toJSON();
    });
  });
});