Add columnNames to LimboResultSet

bindings/java/src/test/java/org/github/tursodatabase/core/LimboStatementTest.java

@@ -1,6 +1,8 @@
 package org.github.tursodatabase.core;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.Properties;
 import org.github.tursodatabase.TestUtils;
@@ -28,4 +30,26 @@ class LimboStatementTest {
     assertTrue(stmt.isClosed());
     assertFalse(stmt.getResultSet().isOpen());
   }
+
+  @Test
+  void test_initializeColumnMetadata() throws Exception {
+    runSql("CREATE TABLE users (name TEXT, age INT, country TEXT);");
+    runSql("INSERT INTO users VALUES ('seonwoo', 30, 'KR');");
+
+    final LimboStatement stmt = connection.prepare("SELECT * FROM users");
+    stmt.initializeColumnMetadata();
+    final LimboResultSet rs = stmt.getResultSet();
+    final String[] columnNames = rs.getColumnNames();
+
+    assertEquals(columnNames[0], "name");
+    assertEquals(columnNames[1], "age");
+    assertEquals(columnNames[2], "country");
+  }
+
+  private void runSql(String sql) throws Exception {
+    LimboStatement stmt = connection.prepare(sql);
+    while (stmt.execute()) {
+      stmt.execute();
+    }
+  }
 }