From b711fdce5ee891445c21b24ad5dc4934ef178559 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Fri, 20 Mar 2026 06:29:58 +0000
Subject: [PATCH 1/2] =?UTF-8?q?=F0=9F=A7=AA=20Add=20missing=20username=20v?=
 =?UTF-8?q?alidation=20edge=20case=20tests?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Co-authored-by: is0692vs <135803462+is0692vs@users.noreply.github.com>
---
 src/lib/__tests__/validators.test.ts | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/lib/__tests__/validators.test.ts b/src/lib/__tests__/validators.test.ts
index 2c03998..283a714 100644
--- a/src/lib/__tests__/validators.test.ts
+++ b/src/lib/__tests__/validators.test.ts
@@ -77,4 +77,29 @@ describe("isValidGitHubUsername", () => {
   it("SQLインジェクション的な文字列は無効", () => {
     expect(isValidGitHubUsername("'; DROP TABLE users; --")).toBe(false);
   });
+
+  it("マルチバイト文字（日本語や絵文字）を含むユーザー名は無効", () => {
+    expect(isValidGitHubUsername("テスト")).toBe(false);
+    expect(isValidGitHubUsername("user😀")).toBe(false);
+    expect(isValidGitHubUsername("déjà-vu")).toBe(false);
+  });
+
+  it("空白文字や制御文字を含むユーザー名は無効", () => {
+    expect(isValidGitHubUsername(" testuser")).toBe(false);
+    expect(isValidGitHubUsername("testuser ")).toBe(false);
+    expect(isValidGitHubUsername("test\nuser")).toBe(false);
+    expect(isValidGitHubUsername("test\tuser")).toBe(false);
+    expect(isValidGitHubUsername("test\0user")).toBe(false);
+  });
+
+  it("ハイフンのみのユーザー名は無効", () => {
+    expect(isValidGitHubUsername("-")).toBe(false);
+    expect(isValidGitHubUsername("--")).toBe(false);
+    expect(isValidGitHubUsername("---")).toBe(false);
+  });
+
+  it("極端に長い文字列は無効 (ReDoS防止の確認)", () => {
+    expect(isValidGitHubUsername("a".repeat(1000))).toBe(false);
+  });
+
 });

From efd02a28a3833efcfdfc4f5b1ca76655943776ee Mon Sep 17 00:00:00 2001
From: is0692vs <is0692vs@ed.ritsumei.ac.jp>
Date: Sat, 21 Mar 2026 13:35:31 +0900
Subject: [PATCH 2/2] test: tighten username validator review fixes

---
 src/lib/__tests__/validators.test.ts | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/src/lib/__tests__/validators.test.ts b/src/lib/__tests__/validators.test.ts
index 283a714..1566421 100644
--- a/src/lib/__tests__/validators.test.ts
+++ b/src/lib/__tests__/validators.test.ts
@@ -92,13 +92,7 @@ describe("isValidGitHubUsername", () => {
     expect(isValidGitHubUsername("test\0user")).toBe(false);
   });
 
-  it("ハイフンのみのユーザー名は無効", () => {
-    expect(isValidGitHubUsername("-")).toBe(false);
-    expect(isValidGitHubUsername("--")).toBe(false);
-    expect(isValidGitHubUsername("---")).toBe(false);
-  });
-
-  it("極端に長い文字列は無効 (ReDoS防止の確認)", () => {
+  it("極端に長い文字列は無効 (長さ上限の確認)", () => {
     expect(isValidGitHubUsername("a".repeat(1000))).toBe(false);
   });