Implement close on LimboStatement and JDBC4Statement independently

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

@@ -0,0 +1,31 @@
+package org.github.tursodatabase.core;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.Properties;
+import org.github.tursodatabase.TestUtils;
+import org.github.tursodatabase.jdbc4.JDBC4Connection;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class LimboStatementTest {
+
+  private JDBC4Connection connection;
+
+  @BeforeEach
+  void setUp() throws Exception {
+    String filePath = TestUtils.createTempFile();
+    String url = "jdbc:sqlite:" + filePath;
+    connection = new JDBC4Connection(url, filePath, new Properties());
+  }
+
+  @Test
+  void closing_statement_closes_related_resources() throws Exception {
+    LimboStatement stmt = connection.prepare("SELECT 1");
+    stmt.execute();
+
+    stmt.close();
+    assertTrue(stmt.isClosed());
+    assertFalse(stmt.getResultSet().isOpen());
+  }
+}

bindings/java/src/test/java/org/github/tursodatabase/jdbc4/JDBC4StatementTest.java

@@ -3,6 +3,7 @@ package org.github.tursodatabase.jdbc4;
 import static org.junit.jupiter.api.Assertions.*;
 
 import java.sql.ResultSet;
+import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.Properties;
 import org.github.tursodatabase.TestUtils;
@@ -51,4 +52,22 @@ class JDBC4StatementTest {
     stmt.execute("INSERT INTO users VALUES (1, 'limbo');");
     assertTrue(stmt.execute("SELECT * FROM users;"));
   }
+
+  @Test
+  void close_statement_test() throws Exception {
+    stmt.close();
+    assertTrue(stmt.isClosed());
+  }
+
+  @Test
+  void double_close_is_no_op() throws SQLException {
+    stmt.close();
+    assertDoesNotThrow(() -> stmt.close());
+  }
+
+  @Test
+  void operations_on_closed_statement_should_throw_exception() throws Exception {
+    stmt.close();
+    assertThrows(SQLException.class, () -> stmt.execute("SELECT 1"));
+  }
 }