Fix download tests

extensions/ql-vscode/test/vscode-tests/cli-integration/remote-queries/variant-analysis-manager.test.ts

@@ -21,6 +21,7 @@ import * as ghApiClient from "../../../../src/remote-queries/gh-api/gh-api-clien
 import * as ghActionsApiClient from "../../../../src/remote-queries/gh-api/gh-actions-api-client";
 import * as fs from "fs-extra";
 import { join } from "path";
+import { Readable } from "stream";
 import { Response } from "node-fetch";
 import * as fetchModule from "node-fetch";
 
@@ -389,10 +390,10 @@ describe("Variant Analysis Manager", () => {
           __dirname,
           "../data/variant-analysis-results.zip",
         );
-        const arrayBuffer = fs.readFileSync(sourceFilePath).buffer;
-        getVariantAnalysisRepoResultStub.mockResolvedValue(
-          new Response(arrayBuffer),
-        );
+        const fileContents = fs.readFileSync(sourceFilePath);
+        const response = new Response(Readable.from(fileContents));
+        response.size = fileContents.length;
+        getVariantAnalysisRepoResultStub.mockResolvedValue(response);
       });
 
       it("should return early if variant analysis is cancelled", async () => {

extensions/ql-vscode/test/vscode-tests/cli-integration/remote-queries/variant-analysis-results-manager.test.ts

@@ -3,6 +3,7 @@ import { CodeQLExtensionInterface } from "../../../../src/extension";
 import { extLogger } from "../../../../src/common";
 import * as fs from "fs-extra";
 import { join, resolve } from "path";
+import { Readable } from "stream";
 import { Response, RequestInfo, RequestInit } from "node-fetch";
 import * as fetchModule from "node-fetch";
 
@@ -94,24 +95,23 @@ describe(VariantAnalysisResultsManager.name, () => {
     });
 
     describe("when the artifact_url is present", () => {
-      let arrayBuffer: ArrayBuffer;
-
       let getVariantAnalysisRepoResultStub: jest.SpiedFunction<
         typeof fetchModule.default
       >;
+      let fileContents: Buffer;
 
       beforeEach(async () => {
         const sourceFilePath = join(
           __dirname,
           "../data/variant-analysis-results.zip",
         );
-        arrayBuffer = fs.readFileSync(sourceFilePath).buffer;
+        fileContents = fs.readFileSync(sourceFilePath);
 
         getVariantAnalysisRepoResultStub = jest
           .spyOn(fetchModule, "default")
           .mockImplementation((url: RequestInfo, _init?: RequestInit) => {
             if (url === dummyRepoTask.artifactUrl) {
-              return Promise.resolve(new Response(arrayBuffer));
+              return Promise.resolve(new Response(Readable.from(fileContents)));
             }
             return Promise.reject(new Error("Unexpected artifact URL"));
           });