fix(setup): 数据库有用户时跳过管理员引导

backend/internal/setup/setup_test.go

@@ -0,0 +1,51 @@
+package setup
+
+import "testing"
+
+func TestDecideAdminBootstrap(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name       string
+		totalUsers int64
+		adminUsers int64
+		should     bool
+		reason     string
+	}{
+		{
+			name:       "empty database should create admin",
+			totalUsers: 0,
+			adminUsers: 0,
+			should:     true,
+			reason:     adminBootstrapReasonEmptyDatabase,
+		},
+		{
+			name:       "admin exists should skip",
+			totalUsers: 10,
+			adminUsers: 1,
+			should:     false,
+			reason:     adminBootstrapReasonAdminExists,
+		},
+		{
+			name:       "users exist without admin should skip",
+			totalUsers: 5,
+			adminUsers: 0,
+			should:     false,
+			reason:     adminBootstrapReasonUsersExistWithoutAdmin,
+		},
+	}
+
+	for _, tc := range tests {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+			got := decideAdminBootstrap(tc.totalUsers, tc.adminUsers)
+			if got.shouldCreate != tc.should {
+				t.Fatalf("shouldCreate=%v, want %v", got.shouldCreate, tc.should)
+			}
+			if got.reason != tc.reason {
+				t.Fatalf("reason=%q, want %q", got.reason, tc.reason)
+			}
+		})
+	}
+}