import Vue from 'vue';
import pipelineComponent from '~/vue_merge_request_widget/components/mr_widget_pipeline.vue';
import mountComponent from 'spec/helpers/vue_mount_component_helper';
import mockData from '../mock_data';

describe('MRWidgetPipeline', () => {
  let vm;
  let Component;

  beforeEach(() => {
    Component = Vue.extend(pipelineComponent);
  });

  afterEach(() => {
    vm.$destroy();
  });

  describe('computed', () => {
    describe('hasPipeline', () => {
      it('should return true when there is a pipeline', () => {
        vm = mountComponent(Component, {
          pipeline: mockData.pipeline,
          ciStatus: 'success',
          hasCi: true,
          troubleshootingDocsPath: 'help',
        });

        expect(vm.hasPipeline).toEqual(true);
      });

      it('should return false when there is no pipeline', () => {
        vm = mountComponent(Component, {
          pipeline: {},
          troubleshootingDocsPath: 'help',
        });

        expect(vm.hasPipeline).toEqual(false);
      });
    });

    describe('hasCIError', () => {
      it('should return false when there is no CI error', () => {
        vm = mountComponent(Component, {
          pipeline: mockData.pipeline,
          hasCi: true,
          ciStatus: 'success',
          troubleshootingDocsPath: 'help',
        });

        expect(vm.hasCIError).toEqual(false);
      });

      it('should return true when there is a CI error', () => {
        vm = mountComponent(Component, {
          pipeline: mockData.pipeline,
          hasCi: true,
          ciStatus: null,
          troubleshootingDocsPath: 'help',
        });

        expect(vm.hasCIError).toEqual(true);
      });
    });
  });

  describe('rendered output', () => {
    it('should render CI error', () => {
      vm = mountComponent(Component, {
        pipeline: mockData.pipeline,
        hasCi: true,
        ciStatus: null,
        troubleshootingDocsPath: 'help',
      });

      expect(vm.$el.querySelector('.media-body').textContent.trim()).toContain(
        'Could not retrieve the pipeline status. For troubleshooting steps, read the documentation.',
      );
    });

    describe('with a pipeline', () => {
      beforeEach(() => {
        vm = mountComponent(Component, {
          pipeline: mockData.pipeline,
          hasCi: true,
          ciStatus: 'success',
          troubleshootingDocsPath: 'help',
        });
      });

      it('should render pipeline ID', () => {
        expect(vm.$el.querySelector('.pipeline-id').textContent.trim()).toEqual(
          `#${mockData.pipeline.id}`,
        );
      });

      it('should render pipeline status and commit id', () => {
        expect(vm.$el.querySelector('.media-body').textContent.trim()).toContain(
          mockData.pipeline.details.status.label,
        );

        expect(vm.$el.querySelector('.js-commit-link').textContent.trim()).toEqual(
          mockData.pipeline.commit.short_id,
        );

        expect(vm.$el.querySelector('.js-commit-link').getAttribute('href')).toEqual(
          mockData.pipeline.commit.commit_path,
        );
      });

      it('should render pipeline graph', () => {
        expect(vm.$el.querySelector('.mr-widget-pipeline-graph')).toBeDefined();
        expect(vm.$el.querySelectorAll('.stage-container').length).toEqual(
          mockData.pipeline.details.stages.length,
        );
      });

      it('should render coverage information', () => {
        expect(vm.$el.querySelector('.media-body').textContent).toContain(
          `Coverage ${mockData.pipeline.coverage}`,
        );
      });
    });

    describe('without commit path', () => {
      beforeEach(() => {
        const mockCopy = Object.assign({}, mockData);
        delete mockCopy.pipeline.commit;

        vm = mountComponent(Component, {
          pipeline: mockCopy.pipeline,
          hasCi: true,
          ciStatus: 'success',
          troubleshootingDocsPath: 'help',
        });
      });

      it('should render pipeline ID', () => {
        expect(vm.$el.querySelector('.pipeline-id').textContent.trim()).toEqual(
          `#${mockData.pipeline.id}`,
        );
      });

      it('should render pipeline status', () => {
        expect(vm.$el.querySelector('.media-body').textContent.trim()).toContain(
          mockData.pipeline.details.status.label,
        );

        expect(vm.$el.querySelector('.js-commit-link')).toBeNull();
      });

      it('should render pipeline graph', () => {
        expect(vm.$el.querySelector('.mr-widget-pipeline-graph')).toBeDefined();
        expect(vm.$el.querySelectorAll('.stage-container').length).toEqual(
          mockData.pipeline.details.stages.length,
        );
      });

      it('should render coverage information', () => {
        expect(vm.$el.querySelector('.media-body').textContent).toContain(
          `Coverage ${mockData.pipeline.coverage}`,
        );
      });
    });

    describe('without coverage', () => {
      it('should not render a coverage', () => {
        const mockCopy = Object.assign({}, mockData);
        delete mockCopy.pipeline.coverage;

        vm = mountComponent(Component, {
          pipeline: mockCopy.pipeline,
          hasCi: true,
          ciStatus: 'success',
          troubleshootingDocsPath: 'help',
        });

        expect(vm.$el.querySelector('.media-body').textContent).not.toContain('Coverage');
      });
    });

    describe('without a pipeline graph', () => {
      it('should not render a pipeline graph', () => {
        const mockCopy = Object.assign({}, mockData);
        delete mockCopy.pipeline.details.stages;

        vm = mountComponent(Component, {
          pipeline: mockCopy.pipeline,
          hasCi: true,
          ciStatus: 'success',
          troubleshootingDocsPath: 'help',
        });

        expect(vm.$el.querySelector('.js-mini-pipeline-graph')).toEqual(null);
      });
    });
  });
});
