diff --git a/lib/node/app.mjs b/lib/node/app.mjs
index 0e3aada..dc01265 100644
--- a/lib/node/app.mjs
+++ b/lib/node/app.mjs
@@ -18,7 +18,6 @@ program.command('test')
     const file = generateTestCode(problem.fullName);
     console.log('running test:', 'npx', 'mocha', file)
     execa('npx', ['mocha',file]).stdout.pipe(process.stdout);
-
   })
 
 program.command('create')
diff --git a/lib/node/utils.mjs b/lib/node/utils.mjs
index 82e006e..8a4767e 100644
--- a/lib/node/utils.mjs
+++ b/lib/node/utils.mjs
@@ -1,9 +1,5 @@
 import path from 'path';
-import fs, { read } from 'fs';
-import {
-  fileURLToPath
-} from 'url';
-
+import fs from 'fs';
 import {QUESTION_BASE, PLAYGROUND_BASE, CACHE_BASE} from './constants.mjs'
 
 function readFile(path) {
diff --git a/questions/1-promise-all/README.md b/questions/1-promise-all/README.md
new file mode 100644
index 0000000..e5fb2d8
--- /dev/null
+++ b/questions/1-promise-all/README.md
@@ -0,0 +1 @@
+# 实现一个Promise.all
diff --git a/questions/1-promise-all/template.js b/questions/1-promise-all/template.js
new file mode 100644
index 0000000..3b2ccd8
--- /dev/null
+++ b/questions/1-promise-all/template.js
@@ -0,0 +1,5 @@
+export default function (MyPromise) {
+    MyPromise.all = function () {
+
+    }
+}
\ No newline at end of file
diff --git a/questions/1-promise-all/test.js b/questions/1-promise-all/test.js
new file mode 100644
index 0000000..c409663
--- /dev/null
+++ b/questions/1-promise-all/test.js
@@ -0,0 +1,17 @@
+/**
+ * 
+ * @param {Mocha.MochaGlobals['describe']} describe 
+ * @param {Mocha.MochaGlobals['it']} it 
+ * @param {import('chai')['expect']} expect 
+ * @param {() => any} code 
+ */
+export default function test(describe, it, expect, code) {
+    describe('#indexOf()', function () {
+        it('should return -1 when the value is not present', function () {
+            expect([1, 2, 3].indexOf(4)).to.equal(-1);
+        });
+    });
+    it('should take less than 500ms', function (done) {
+        expect(2).to.equal(200);
+    });
+}
\ No newline at end of file