fix: add retry tests

Author: janek26

src/shared/chrome.ts

@@ -14,8 +14,8 @@ export async function autoConnect(
 ) {
   const port = await retry(
     () => browser.runtime.connect(),
-    3, // 3 retries
-    (retry) => wait(retry * 150), // 150ms, 300ms, max total wait 450ms
+    3, // 3 retries plus the initial try, so 4 total tries
+    (retry) => wait(retry * 100), // 100ms, 200ms, 300ms, max total wait 600ms
   );
   console.log('Port connected');
   const cleanUp = onConnect(port);

test/retry.test.ts

@@ -0,0 +1,44 @@
+import { retry, wait } from '../src/shared/retry';
+
+describe('retry function', () => {
+  it('should retry the function for the specified number of times', async () => {
+    let counter = 0;
+    const fn = () => {
+      counter++;
+      if (counter < 3) {
+        throw new Error('Error');
+      }
+      return 'Success';
+    };
+    const result = await retry(fn, 3, wait);
+    expect(result).toBe('Success');
+  });
+
+  it('should throw an error if the function fails after the specified number of retries', async () => {
+    const fn = () => {
+      throw new Error('Error');
+    };
+    await expect(retry(fn, 3, wait)).rejects.toThrow('Error');
+  });
+
+  it('should pass the number of retries to the wait function', async () => {
+    const fn = () => {
+      throw new Error('Error');
+    };
+    const waitFn = jest.fn(wait);
+    await expect(retry(fn, 3, waitFn)).rejects.toThrow('Error');
+    expect(waitFn).toHaveBeenCalledTimes(3);
+    expect(waitFn).toHaveBeenNthCalledWith(1, 1);
+    expect(waitFn).toHaveBeenNthCalledWith(2, 2);
+    expect(waitFn).toHaveBeenNthCalledWith(3, 3);
+  });
+});
+
+describe('wait function', () => {
+  it('should wait for the specified number of milliseconds', async () => {
+    const start = Date.now();
+    await wait(100);
+    const end = Date.now();
+    expect(end - start).toBeGreaterThanOrEqual(100);
+  });
+});