test(server): add PKI, enrollment, and license quota tests in test_server.py

tests/test_server.py

@@ -176,6 +176,121 @@ class TestServerComponent(unittest.TestCase):
         self.assertEqual(rows["SigWarn"], "TRANSIENT")
         self.assertEqual(rows["SigInfo"], "TRANSIENT")
 
+    def test_license_schema_and_pki_generation(self):
+        secret = "test-secret-12345"
+        Server.init_db(self.test_db, enrollment_secret=secret, max_seats=5)
+
+        conn = sqlite3.connect(self.test_db)
+        c = conn.cursor()
+        c.execute("SELECT max_seats, enrollment_secret FROM license_config WHERE id = 1")
+        row = c.fetchone()
+        conn.close()
+
+        self.assertIsNotNone(row)
+        self.assertEqual(row[0], 5)
+        self.assertEqual(row[1], secret)
+
+        # Test Dynamic PKI
+        test_cert_dir = "test_certs_pki"
+        try:
+            ca_cert, ca_key, ca_pem, ca_key_pem = Server.enrollment.generate_ca_if_needed(cert_dir=test_cert_dir)
+            self.assertIn("BEGIN CERTIFICATE", ca_pem)
+            self.assertIn("BEGIN RSA PRIVATE KEY", ca_key_pem)
+
+            srv_cert, srv_key, srv_pem, srv_key_pem = Server.enrollment.generate_server_cert_if_needed(
+                ca_cert, ca_key, hostnames=["127.0.0.1", "localhost"], cert_dir=test_cert_dir
+            )
+            self.assertIn("BEGIN CERTIFICATE", srv_pem)
+
+            client_cert_pem, client_key_pem = Server.enrollment.issue_client_cert("node-test-1", ca_cert, ca_key)
+            self.assertIn("BEGIN CERTIFICATE", client_cert_pem)
+            self.assertIn("BEGIN RSA PRIVATE KEY", client_key_pem)
+
+            fp = Server.enrollment.calculate_cert_fingerprint(client_cert_pem)
+            self.assertEqual(len(fp), 64)
+        finally:
+            import shutil
+            if os.path.exists(test_cert_dir):
+                shutil.rmtree(test_cert_dir, ignore_errors=True)
+
+    def test_enrollment_endpoint_and_seat_quota(self):
+        from fastapi import HTTPException
+        secret = "super-secret-enrollment"
+        max_seats = 2
+        Server.init_db(self.test_db, enrollment_secret=secret, max_seats=max_seats)
+
+        test_cert_dir = "test_certs_enroll"
+        try:
+            ca_cert, ca_key, ca_pem, _ = Server.enrollment.generate_ca_if_needed(cert_dir=test_cert_dir)
+            Server.SERVER_STATE["config"] = {"db_path": self.test_db}
+            Server.SERVER_STATE["ca_cert"] = ca_cert
+            Server.SERVER_STATE["ca_key"] = ca_key
+            Server.SERVER_STATE["ca_cert_pem"] = ca_pem
+
+            # 1. Invalid secret should raise 403
+            bad_req = Server.ClientEnrollRequest(
+                client_id="client-1",
+                hostname="host-1",
+                os="linux",
+                enrollment_secret="wrong-secret"
+            )
+            with self.assertRaises(HTTPException) as cm:
+                Server.enroll_client(bad_req)
+            self.assertEqual(cm.exception.status_code, 403)
+
+            # 2. Valid enrollment for client 1
+            req1 = Server.ClientEnrollRequest(
+                client_id="client-1",
+                hostname="host-1",
+                os="linux",
+                enrollment_secret=secret
+            )
+            resp1 = Server.enroll_client(req1)
+            self.assertIn("client_cert", resp1)
+            self.assertIn("client_key", resp1)
+            self.assertEqual(resp1["ca_cert"], ca_pem)
+
+            # 3. Valid enrollment for client 2
+            req2 = Server.ClientEnrollRequest(
+                client_id="client-2",
+                hostname="host-2",
+                os="windows",
+                enrollment_secret=secret
+            )
+            resp2 = Server.enroll_client(req2)
+            self.assertIn("client_cert", resp2)
+
+            # 4. Seat quota exhausted: client 3 should raise 403
+            req3 = Server.ClientEnrollRequest(
+                client_id="client-3",
+                hostname="host-3",
+                os="linux",
+                enrollment_secret=secret
+            )
+            with self.assertRaises(HTTPException) as cm:
+                Server.enroll_client(req3)
+            self.assertEqual(cm.exception.status_code, 403)
+            self.assertIn("License seat limit reached", cm.exception.detail)
+
+            # 5. Re-enrollment for existing client 1 should succeed
+            resp1_re = Server.enroll_client(req1)
+            self.assertIn("client_cert", resp1_re)
+
+            # 6. Revoked client should be rejected
+            conn = sqlite3.connect(self.test_db)
+            conn.execute("UPDATE clients SET status = 'revoked' WHERE client_id = 'client-1'")
+            conn.commit()
+            conn.close()
+
+            with self.assertRaises(HTTPException) as cm:
+                Server.enroll_client(req1)
+            self.assertEqual(cm.exception.status_code, 403)
+            self.assertIn("revoked", cm.exception.detail)
+        finally:
+            import shutil
+            if os.path.exists(test_cert_dir):
+                shutil.rmtree(test_cert_dir, ignore_errors=True)
+
 
 if __name__ == "__main__":
     unittest.main()