fix(routing): apply windowTitle on first load

package.json

@@ -107,6 +107,8 @@
     "inquirer": "6.2.2",
     "jest": "24.7.1",
     "jest-diff": "24.7.0",
+    "jest-environment-jsdom": "24.7.1",
+    "jest-environment-jsdom-global": "1.2.0",
     "jest-watch-typeahead": "0.3.0",
     "jsdom-global": "3.0.2",
     "mversion": "1.13.0",

scripts/jest/config.js

@@ -2,6 +2,7 @@
 
 module.exports = {
   rootDir: process.cwd(),
+  testEnvironment: 'jest-environment-jsdom-global',
   testPathIgnorePatterns: [
     '<rootDir>/node_modules/',
     '<rootDir>/dist*',

src/lib/__tests__/RoutingManager-test.js

@@ -1,5 +1,7 @@
+/* globals jsdom */
 import instantsearch from '../main';
 import RoutingManager from '../RoutingManager';
+import historyRouter from '../routers/history';
 
 const runAllMicroTasks = () => new Promise(setImmediate);
 
@@ -545,4 +547,42 @@ describe('RoutingManager', () => {
       });
     });
   });
+
+  describe('windowTitle', () => {
+    test('should update the window title with URL query params on first render', async () => {
+      jsdom.reconfigure({
+        url: 'https://website.com/?query=query',
+      });
+
+      const setWindowTitle = jest.spyOn(window.document, 'title', 'set');
+      const searchClient = createFakeSearchClient();
+      const stateMapping = createFakeStateMapping();
+      const router = historyRouter({
+        windowTitle(routeState) {
+          return `Searching for "${routeState.query}"`;
+        },
+      });
+
+      const search = instantsearch({
+        indexName: 'instant_search',
+        searchClient,
+        routing: {
+          router,
+          stateMapping,
+        },
+      });
+
+      const fakeSearchBox = createFakeSearchBox();
+
+      search.addWidget(fakeSearchBox);
+      search.start();
+
+      await runAllMicroTasks();
+
+      expect(setWindowTitle).toHaveBeenCalledTimes(1);
+      expect(setWindowTitle).toHaveBeenLastCalledWith('Searching for "query"');
+
+      setWindowTitle.mockRestore();
+    });
+  });
 });

src/lib/routers/history.js

@@ -15,6 +15,12 @@ function defaultParseURL({ qsModule, location }) {
   return qsModule.parse(location.search.slice(1));
 }
 
+function setWindowTitle(title) {
+  if (title) {
+    window.document.title = title;
+  }
+}
+
 class BrowserHistory {
   /**
    * Initializes a new storage provider that will sync the search state in the URL
@@ -44,6 +50,10 @@ class BrowserHistory {
     this.writeDelay = writeDelay;
     this._createURL = createURL;
     this.parseURL = parseURL;
+
+    const title = this.windowTitle && this.windowTitle(this.read());
+
+    setWindowTitle(title);
   }
 
   /**
@@ -60,7 +70,8 @@ class BrowserHistory {
     }
 
     this.writeTimer = setTimeout(() => {
-      if (title) window.document.title = title;
+      setWindowTitle(title);
+
       window.history.pushState(routeState, title || '', url);
       this.writeTimer = undefined;
     }, this.writeDelay);

yarn.lock

@@ -7256,7 +7256,12 @@ jest-each@^24.7.1:
     jest-util "^24.7.1"
     pretty-format "^24.7.0"
 
-jest-environment-jsdom@^24.7.1:
+jest-environment-jsdom-global@1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/jest-environment-jsdom-global/-/jest-environment-jsdom-global-1.2.0.tgz#dd5b16fe0a0566ee40010d8632be5adf5a5ccb65"
+  integrity sha512-41cDl0OxzmFY/cnW0COUN+lnt2N2ks1r3V4fAKOnlZ9xIrGy0PNPan+Bz8HP+uQy/8bGV6T7J4Oi7X+h43It6g==
+
+jest-environment-jsdom@24.7.1, jest-environment-jsdom@^24.7.1:
   version "24.7.1"
   resolved "https://registry.yarnpkg.com/jest-environment-jsdom/-/jest-environment-jsdom-24.7.1.tgz#a40e004b4458ebeb8a98082df135fd501b9fbbd6"
   integrity sha512-Gnhb+RqE2JuQGb3kJsLF8vfqjt3PHKSstq4Xc8ic+ax7QKo4Z0RWGucU3YV+DwKR3T9SYc+3YCUQEJs8r7+Jxg==