Fix errors when running the integration tests

JavaScript error: http://127.0.0.1:42301/build/generic/web/viewer.mjs, line 5822: TypeError: this[#state] is null
JavaScript error: http://127.0.0.1:42301/build/generic/web/viewer.mjs, line 6001: TypeError: can't access property "getPage", this._pdfDocument is null

Author: calixteman

web/pdf_find_controller.js

@@ -771,6 +771,9 @@ class PDFFindController {
   }
 
   #calculateMatch(pageIndex) {
+    if (!this.#state) {
+      return;
+    }
     const query = this.#query;
     if (query.length === 0) {
       return; // Do nothing: the matches should be wiped out already.
@@ -882,12 +885,17 @@ class PDFFindController {
 
     let deferred = Promise.resolve();
     const textOptions = { disableNormalization: true };
+    const pdfDoc = this._pdfDocument;
     for (let i = 0, ii = this._linkService.pagesCount; i < ii; i++) {
       const { promise, resolve } = Promise.withResolvers();
       this._extractTextPromises[i] = promise;
 
-      deferred = deferred.then(() =>
-        this._pdfDocument
+      deferred = deferred.then(async () => {
+        if (pdfDoc !== this._pdfDocument) {
+          resolve();
+          return;
+        }
+        await pdfDoc
           .getPage(i + 1)
           .then(pdfPage => pdfPage.getTextContent(textOptions))
           .then(
@@ -920,8 +928,8 @@ class PDFFindController {
               this._hasDiacritics[i] = false;
               resolve();
             }
-          )
-      );
+          );
+      });
     }
   }