test-workers (#1863)

* Add getImportedScripts utility function to test-sw.js

* Move functionality to testServiceWorker

* Rename file

* Add loadEslint utility function

* Add filterScriptPaths utility

1 files changed, 102 insertions, 0 deletions

diff --git a/test/test-workers.js b/test/test-workers.js
new file mode 100644
index 00000000..9f9c4d13
--- /dev/null
+++ b/test/test-workers.js
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2020-2021  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+const fs = require('fs');
+const path = require('path');
+const {JSDOM} = require('jsdom');
+const {VM} = require('../dev/vm');
+const assert = require('assert');
+
+
+function loadEslint() {
+    return JSON.parse(fs.readFileSync(path.join(__dirname, '..', '.eslintrc.json'), {encoding: 'utf8'}));
+}
+
+function filterScriptPaths(scriptPaths) {
+    const extDirName = 'ext';
+    return scriptPaths.filter((src) => !src.startsWith('/lib/')).map((src) => `${extDirName}${src}`);
+}
+
+function getAllHtmlScriptPaths(fileName) {
+    const domSource = fs.readFileSync(fileName, {encoding: 'utf8'});
+    const dom = new JSDOM(domSource);
+    const {window} = dom;
+    const {document} = window;
+    try {
+        const scripts = document.querySelectorAll('script');
+        return [...scripts].map(({src}) => src);
+    } finally {
+        window.close();
+    }
+}
+
+function convertBackgroundScriptsToServiceWorkerScripts(scripts) {
+    // Use parse5-based SimpleDOMParser
+    scripts.splice(0, 0, '/lib/parse5.js');
+    const index = scripts.indexOf('/js/dom/native-simple-dom-parser.js');
+    assert.ok(index >= 0);
+    scripts[index] = '/js/dom/simple-dom-parser.js';
+}
+
+function getImportedScripts(scriptPath, fields) {
+    const importedScripts = [];
+
+    const importScripts = (...scripts) => {
+        importedScripts.push(...scripts);
+    };
+
+    const vm = new VM(Object.assign({importScripts}, fields));
+    vm.context.self = vm.context;
+    vm.execute([scriptPath]);
+
+    return importedScripts;
+}
+
+function testServiceWorker() {
+    // Verify that sw.js scripts match background.html scripts
+    const extDir = path.join(__dirname, '..', 'ext');
+    const scripts = getAllHtmlScriptPaths(path.join(extDir, 'background.html'));
+    convertBackgroundScriptsToServiceWorkerScripts(scripts);
+    const importedScripts = getImportedScripts('sw.js', {});
+    assert.deepStrictEqual(scripts, importedScripts);
+
+    // Verify that eslint config lists files correctly
+    const expectedSwRulesFiles = filterScriptPaths(scripts);
+    const eslintConfig = loadEslint();
+    const swRules = eslintConfig.overrides.find((item) => (
+        typeof item.env === 'object' &&
+        item.env !== null &&
+        item.env.serviceworker === true
+    ));
+    assert.ok(typeof swRules !== 'undefined');
+    assert.ok(Array.isArray(swRules.files));
+    assert.deepStrictEqual(swRules.files, expectedSwRulesFiles);
+}
+
+function main() {
+    try {
+        testServiceWorker();
+    } catch (e) {
+        console.error(e);
+        process.exit(-1);
+        return;
+    }
+    process.exit(0);
+}
+
+
+if (require.main === module) { main(); }