fix(est-test): reject duplicate JDL tables

resources/tester/test_est_jdl_special.py

@@ -181,3 +181,17 @@ def test_jdl_estimate_preserves_components_when_total_matches():
     )
     assert result["GC"] == 0
     assert result["NC"] == 20
+
+
+def test_jdl_rejects_case_insensitive_duplicate_tables():
+    project = json.loads((ROOT / "tools/est-test/sample.json").read_text(encoding="utf-8"))
+    script = """const fs=require('fs'),j=require('./tools/est-test/jdl.cjs'),a=require('./tools/est-test/archive.cjs');
+      const p=JSON.parse(fs.readFileSync(0,'utf8'));
+      const files=new Map([['Global.ini',Buffer.from('[BASIC]')],['Main.txt',Buffer.from('0\\tfirst\\t02\\x05\\r\\n')],
+        ['MAIN.TXT',Buffer.from('0\\tsecond\\t02\\x05\\r\\n')]]);
+      try { j.read(a.pack(files),p); process.stdout.write('accepted'); }
+      catch(error) { process.stdout.write(error.message); }"""
+    result = subprocess.check_output(
+        ["node", "-e", script], input=json.dumps(project).encode(), cwd=ROOT, text=False
+    ).decode("utf-8")
+    assert "중복" in result