테넌트 crud 테스트 코드 추가

backend/internal/repository/user_repository_test.go

@@ -56,7 +56,7 @@ func TestUserRepository(t *testing.T) {
 		_ = repo.Create(ctx, &domain.User{Email: "alice@test.com", Name: "Alice", Role: "user"})
 		_ = repo.Create(ctx, &domain.User{Email: "bob@test.com", Name: "Bob", Role: "user"})
 
-		users, total, err := repo.List(ctx, 0, 10, "Alice")
+		users, total, err := repo.List(ctx, 0, 10, "Alice", "")
 		assert.NoError(t, err)
 		assert.True(t, total >= 1)
 		assert.Equal(t, "Alice", users[0].Name)
@@ -73,4 +73,25 @@ func TestUserRepository(t *testing.T) {
 		assert.Error(t, err) // Should not be found
 		assert.Nil(t, found)
 	})
+
+	t.Run("CountByCompanyCodes", func(t *testing.T) {
+		// Clean start for this subtest
+		testDB.Exec("DELETE FROM users")
+
+		users := []domain.User{
+			{Email: "u1@a.com", Name: "U1", CompanyCode: "tenant-a"},
+			{Email: "u2@a.com", Name: "U2", CompanyCode: "tenant-a"},
+			{Email: "u3@b.com", Name: "U3", CompanyCode: "tenant-b"},
+			{Email: "u4@none.com", Name: "U4", CompanyCode: ""},
+		}
+		for _, u := range users {
+			_ = repo.Create(ctx, &u)
+		}
+
+		counts, err := repo.CountByCompanyCodes(ctx, []string{"tenant-a", "tenant-b", "tenant-c"})
+		assert.NoError(t, err)
+		assert.Equal(t, int64(2), counts["tenant-a"])
+		assert.Equal(t, int64(1), counts["tenant-b"])
+		assert.Equal(t, int64(0), counts["tenant-c"])
+	})
 }