diff --git a/packages/util/__tests__/index.test.ts b/packages/util/__tests__/index.test.ts
new file mode 100644
index 0000000..cbe1c6d
--- /dev/null
+++ b/packages/util/__tests__/index.test.ts
@@ -0,0 +1,33 @@
+import util from '../src';
+
+const types = {
+  time: 'Object',
+  loader: 'Object',
+  file: 'Object',
+  color: 'Object',
+  uuid: 'Object',
+  istype: 'Object',
+  data: 'Object',
+}
+
+function getType (data: any): string {
+  const typeStr = Object.prototype.toString.call(data) || '';
+  const result = typeStr.replace(/(\[object|\])/ig, '').trim();
+  return result;
+}
+
+
+describe('@idraw/util', () => {
+
+  test('index', async () => {
+    const keys = Object.keys(util);
+    keys.forEach((key) => {
+      // @ts-ignore
+      const type = getType(util[key]);
+      // @ts-ignore
+      expect(type).toStrictEqual(types[key]);
+    });
+  });
+
+});
+
diff --git a/packages/util/__tests__/lib/time.test.ts b/packages/util/__tests__/lib/time.test.ts
new file mode 100644
index 0000000..3472723
--- /dev/null
+++ b/packages/util/__tests__/lib/time.test.ts
@@ -0,0 +1,28 @@
+import {
+  toColorHexNum,
+  toColorHexStr,
+  isColorStr
+} from '../../src/lib/color';
+
+
+describe('@idraw/util: lib/color', () => {
+  const hex = '#f0f0f0';
+  const num = 15790320;
+
+  test('toColorHexNum', async () => {
+    const result = toColorHexNum(hex);
+    expect(result).toStrictEqual(num);
+  });
+
+  test('toColorHexStr', async () => {
+    const result = toColorHexStr(num);
+    expect(result).toStrictEqual(hex);
+  });
+
+  test('isColorStr', async () => {
+    const result = isColorStr(hex);
+    expect(result).toStrictEqual(true);
+  });
+
+});
+