Panels: Fixes default tab for visualizations without Queries Tab (#19803)

Fixes #19762

public/app/features/dashboard/panel_editor/PanelEditor.tsx

@@ -2,7 +2,7 @@ import React, { PureComponent } from 'react';
 import classNames from 'classnames';
 import { hot } from 'react-hot-loader';
 import { connect } from 'react-redux';
-import { Tooltip, PanelPlugin, PanelPluginMeta } from '@grafana/ui';
+import { PanelPlugin, PanelPluginMeta, Tooltip } from '@grafana/ui';
 import { AngularComponent, config } from '@grafana/runtime';
 
 import { QueriesTab } from './QueriesTab';
@@ -12,8 +12,9 @@ import { AlertTab } from '../../alerting/AlertTab';
 import { PanelModel } from '../state/PanelModel';
 import { DashboardModel } from '../state/DashboardModel';
 import { StoreState } from '../../../types';
-import { PanelEditorTabIds, PanelEditorTab } from './state/reducers';
-import { refreshPanelEditor, changePanelEditorTab, panelEditorCleanUp } from './state/actions';
+import { PanelEditorTab, PanelEditorTabIds } from './state/reducers';
+import { changePanelEditorTab, panelEditorCleanUp, refreshPanelEditor } from './state/actions';
+import { getActiveTabAndTabs } from './state/selectors';
 
 interface PanelEditorProps {
   panel: PanelModel;
@@ -108,10 +109,7 @@ class UnConnectedPanelEditor extends PureComponent<PanelEditorProps> {
   }
 }
 
-export const mapStateToProps = (state: StoreState) => ({
-  activeTab: state.location.query.tab || PanelEditorTabIds.Queries,
-  tabs: state.panelEditor.tabs,
-});
+export const mapStateToProps = (state: StoreState) => getActiveTabAndTabs(state.location, state.panelEditor);
 
 const mapDispatchToProps = { refreshPanelEditor, panelEditorCleanUp, changePanelEditorTab };
 

public/app/features/dashboard/panel_editor/state/selectors.test.ts

@@ -0,0 +1,88 @@
+import { getActiveTabAndTabs } from './selectors';
+import { LocationState } from '../../../../types';
+import { getPanelEditorTab, PanelEditorState, PanelEditorTab, PanelEditorTabIds } from './reducers';
+
+describe('getActiveTabAndTabs', () => {
+  describe('when called and location state contains tab', () => {
+    it('then it should return location state', () => {
+      const activeTabId = 1337;
+      const location: LocationState = {
+        path: 'a path',
+        lastUpdated: 1,
+        replace: false,
+        routeParams: {},
+        query: {
+          tab: activeTabId,
+        },
+        url: 'an url',
+      };
+      const panelEditor: PanelEditorState = {
+        activeTab: PanelEditorTabIds.Queries,
+        tabs: [],
+      };
+
+      const result = getActiveTabAndTabs(location, panelEditor);
+
+      expect(result).toEqual({
+        activeTab: activeTabId,
+        tabs: [],
+      });
+    });
+  });
+
+  describe('when called without location state and PanelEditor state contains tabs', () => {
+    it('then it should return the id for the first tab in PanelEditor state', () => {
+      const activeTabId = PanelEditorTabIds.Visualization;
+      const tabs = [getPanelEditorTab(PanelEditorTabIds.Visualization), getPanelEditorTab(PanelEditorTabIds.Advanced)];
+      const location: LocationState = {
+        path: 'a path',
+        lastUpdated: 1,
+        replace: false,
+        routeParams: {},
+        query: {
+          tab: undefined,
+        },
+        url: 'an url',
+      };
+      const panelEditor: PanelEditorState = {
+        activeTab: PanelEditorTabIds.Advanced,
+        tabs,
+      };
+
+      const result = getActiveTabAndTabs(location, panelEditor);
+
+      expect(result).toEqual({
+        activeTab: activeTabId,
+        tabs,
+      });
+    });
+  });
+
+  describe('when called without location state and PanelEditor state does not contain tabs', () => {
+    it('then it should return PanelEditorTabIds.Queries', () => {
+      const activeTabId = PanelEditorTabIds.Queries;
+      const tabs: PanelEditorTab[] = [];
+      const location: LocationState = {
+        path: 'a path',
+        lastUpdated: 1,
+        replace: false,
+        routeParams: {},
+        query: {
+          tab: undefined,
+        },
+        url: 'an url',
+      };
+      const panelEditor: PanelEditorState = {
+        activeTab: PanelEditorTabIds.Advanced,
+        tabs,
+      };
+
+      const result = getActiveTabAndTabs(location, panelEditor);
+
+      expect(result).toEqual({
+        activeTab: activeTabId,
+        tabs,
+      });
+    });
+  });
+});

public/app/features/dashboard/panel_editor/state/selectors.ts

@@ -0,0 +1,11 @@
+import memoizeOne from 'memoize-one';
+import { LocationState } from '../../../../types';
+import { PanelEditorState, PanelEditorTabIds } from './reducers';
+
+export const getActiveTabAndTabs = memoizeOne((location: LocationState, panelEditor: PanelEditorState) => {
+  const panelEditorTab = panelEditor.tabs.length > 0 ? panelEditor.tabs[0].id : PanelEditorTabIds.Queries;
+  return {
+    activeTab: location.query.tab || panelEditorTab,
+    tabs: panelEditor.tabs,
+  };
+});