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server/test-db.js

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+const duckdb = require('duckdb');
+const path = require('path');
+
+const dbPath = path.join(__dirname, 'data', 'chat.duckdb');
+const db = new duckdb.Database(dbPath);
+const con = db.connect();
+
+console.log('Testing DuckDB operations...');
+
+const walletAddress = 'test_wallet_' + Date.now();
+const username = 'TestUser';
+const now = new Date().toISOString();
+
+// Test User Upsert
+con.run(`INSERT INTO users (wallet_address, username, last_seen) VALUES (?, ?, ?) 
+        ON CONFLICT (wallet_address) DO UPDATE SET last_seen = EXCLUDED.last_seen, username = EXCLUDED.username`,
+    [walletAddress, username, now], (err) => {
+        if (err) {
+            console.error('FAIL: User upsert failed:', err);
+            process.exit(1);
+        }
+        console.log('PASS: User upsert successful');
+
+        // Test Message Insert
+        const channelId = 'nebula';
+        const content = 'Test message content';
+        con.run(`INSERT INTO messages (id, channel_id, wallet_address, content, timestamp) 
+                VALUES (nextval('seq_msg_id'), ?, ?, ?, ?)`,
+            [channelId, walletAddress, content, now], function (err) {
+                if (err) {
+                    console.error('FAIL: Message insert failed:', err);
+                    process.exit(1);
+                }
+                console.log('PASS: Message insert successful');
+
+                // Verify Data
+                con.all(`SELECT * FROM messages WHERE wallet_address = ?`, [walletAddress], (err, rows) => {
+                    if (err || rows.length === 0) {
+                        console.error('FAIL: Verification failed:', err);
+                        process.exit(1);
+                    }
+                    console.log('PASS: Verification successful, found message:', rows[0].content);
+                    console.log('All tests passed!');
+                    process.exit(0);
+                });
+            });
+    });