diff --git a/src/utils/timeConvert.utils.ts b/src/utils/timeConvert.utils.ts
index 0d9a018..12f510a 100644
--- a/src/utils/timeConvert.utils.ts
+++ b/src/utils/timeConvert.utils.ts
@@ -5,10 +5,11 @@ function unixLocal(unix: number) {
 }
 
 function jsUnix(js: number) {
-  var preRound = js / 1000;
-  return Math.round(preRound);
+  return Math.floor(js / 1000);
 }
 
+export { jsUnix, unixLocal }
+
 module.exports = {
   unixLocal,
   jsUnix,
diff --git a/test/utils/timeConvert.utils.test.ts b/test/utils/timeConvert.utils.test.ts
new file mode 100644
index 0000000..520221f
--- /dev/null
+++ b/test/utils/timeConvert.utils.test.ts
@@ -0,0 +1,17 @@
+import { jsUnix, unixLocal } from "../../src/utils/timeConvert.utils";
+
+describe("Time Conversion", () => {
+  test('Should return unix time (seconds)', () => {
+    const now = new Date();
+    const nowJs = now.getTime();
+    const nowUnix = Math.floor(now.getTime() / 1000);
+    expect(jsUnix(nowJs)).toEqual(nowUnix);
+  })
+
+  test('Should return locale date string', () => {
+    const now = new Date();
+    const nowUnix = Math.floor(now.getTime() / 1000);
+    const result = now.toLocaleString();
+    expect(unixLocal(nowUnix)).toEqual(result);
+  })
+});
\ No newline at end of file