add download API test

Author: xsro

src/test/suite/download.test.ts

@@ -0,0 +1,16 @@
+import assert = require("assert");
+import { downloadFromMultiSources } from "../../utils/downloadFile";
+
+suite("test download", async function () {
+    test("test download with fetch", async function () {
+        const list = [
+            'https://cdn.jsdelivr.net/gh/MicrosoftDocs/cpp-docs@master/docs/assembler/masm/assume.md',
+            'https://raw.githubusercontent.com/MicrosoftDocs/cpp-docs/master/docs/assembler/masm/assume.md',
+            'https://gitee.com/dosasm/cpp-docs/raw/master/docs/assembler/masm/assume.md'
+        ];
+        for (const url of list) {
+            const str = await downloadFromMultiSources([url]);
+            assert.ok(str, url);
+        }
+    });
+});

src/test/suite/index.ts

@@ -23,7 +23,7 @@ export function run(): Promise<void> {
 	const testsRoot = path.resolve(__dirname, '..');
 
 	return new Promise((c, e) => {
-		glob('**/*.test.js', { cwd: testsRoot }, (err, files) => {
+		glob('**/download.test.js', { cwd: testsRoot }, (err, files) => {
 			if (err) {
 				return e(err);
 			}

src/utils/downloadFile.ts

@@ -2,6 +2,7 @@
  * API for downloading information from web
  */
 import { logger } from "./logger";
+import fetch from "node-fetch";
 
 export async function downloadFromMultiSources(urls: string[]): Promise<string | undefined> {
     for (const url of urls) {

webpack.config.js

@@ -49,7 +49,7 @@ const config = {
     },
     plugins: [
         new webpack.ProvidePlugin({
-            fetch: 'node-fetch',
+            // fetch: 'node-fetch',
         }),
     ],
     optimization: {
@@ -105,6 +105,7 @@ const webExtensionConfig = {
     ],
     externals: {
         vscode: 'commonjs vscode', // ignored because it doesn't exist
+        'node-fetch':'window fetch'
     },
     performance: {
         hints: false,