test: add unit test for getFeatures

packages/puppeteer-core/src/node/ChromeLauncher.test.ts

@@ -0,0 +1,47 @@
+/**
+ * Copyright 2023 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import {describe, it} from 'node:test';
+
+import expect from 'expect';
+
+import {getFeatures} from './ChromeLauncher.js';
+
+describe('getFeatures', () => {
+  it('returns an empty array when no options are provided', () => {
+    const result = getFeatures('--foo');
+    expect(result).toEqual([]);
+  });
+
+  it('returns an empty array when no options match the flag', () => {
+    const result = getFeatures('--foo', ['--bar', '--baz']);
+    expect(result).toEqual([]);
+  });
+
+  it('returns an array of values when options match the flag', () => {
+    const result = getFeatures('--foo', ['--foo=bar', '--foo=baz']);
+    expect(result).toEqual(['bar', 'baz']);
+  });
+
+  it('handles whitespace around the flag and value', () => {
+    const result = getFeatures('--foo', ['--foo bar', '--foo baz ']);
+    expect(result).toEqual(['bar', 'baz']);
+  });
+
+  it('handles equals sign around the flag and value', () => {
+    const result = getFeatures('--foo', ['--foo=bar', '--foo=baz ']);
+    expect(result).toEqual(['bar', 'baz']);
+  });
+});