userfront&backend test coverage 추가

test/summarize_userfront_coverage_test.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+WORK_DIR="$(mktemp -d)"
+trap 'rm -rf "$WORK_DIR"' EXIT
+
+mkdir -p "$WORK_DIR/userfront/coverage"
+
+cat > "$WORK_DIR/userfront/coverage/lcov.info" <<'LCOV'
+SF:lib/main.dart
+DA:1,1
+DA:2,0
+LF:2
+LH:1
+end_of_record
+SF:lib/i18n_data.dart
+DA:1,0
+LF:1
+LH:0
+end_of_record
+SF:lib/features/auth/domain/login_challenge_resolver.dart
+DA:10,1
+DA:11,1
+DA:12,0
+LF:3
+LH:2
+end_of_record
+SF:lib/core/services/logout_service.dart
+DA:20,1
+DA:21,1
+LF:2
+LH:2
+end_of_record
+LCOV
+
+(
+  cd "$WORK_DIR"
+  node "$ROOT_DIR/scripts/summarize_flutter_coverage.mjs" userfront
+)
+
+node - "$WORK_DIR/reports/package-coverage-summary.json" <<'NODE'
+const fs = require("node:fs");
+
+const summary = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
+const row = summary.packages[0];
+
+function assertEqual(actual, expected, message) {
+  if (actual !== expected) {
+    throw new Error(`${message}: expected ${expected}, got ${actual}`);
+  }
+}
+
+assertEqual(row.package, "userfront", "package name");
+assertEqual(row.statements, 80, "line coverage must exclude bootstrap/generated files");
+assertEqual(row.lines, 80, "lines coverage must match statements for Flutter lcov");
+assertEqual(row.coveredLines, 4, "covered lines");
+assertEqual(row.totalLines, 5, "total lines");
+assertEqual(row.lcovPath, "userfront/coverage/lcov.info", "lcov path");
+NODE
+
+grep -Fq "| userfront | 80.00% | 4 / 5 | userfront/coverage/lcov.info |" \
+  "$WORK_DIR/reports/userfront-coverage-summary.md"
+
+echo "OK: userfront Flutter LCOV summary is generated"