Implement JDBC4ResultSEt.java's next() method

bindings/java/src/test/java/org/github/tursodatabase/IntegrationTest.java

@@ -22,7 +22,6 @@ public class IntegrationTest {
     }
 
     @Test
-    @Disabled("Doesn't work on workflow. Need investigation.")
     void create_table_multi_inserts_select() throws Exception {
         Statement stmt = createDefaultStatement();
         stmt.execute("CREATE TABLE users (id INT PRIMARY KEY, username TEXT);");

bindings/java/src/test/java/org/github/tursodatabase/jdbc4/JDBC4ResultSetTest.java

@@ -0,0 +1,58 @@
+package org.github.tursodatabase.jdbc4;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.sql.ResultSet;
+import java.sql.Statement;
+import java.util.Properties;
+
+import org.github.tursodatabase.TestUtils;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class JDBC4ResultSetTest {
+
+    private Statement stmt;
+
+    @BeforeEach
+    void setUp() throws Exception {
+        String filePath = TestUtils.createTempFile();
+        String url = "jdbc:sqlite:" + filePath;
+        final JDBC4Connection connection = new JDBC4Connection(url, filePath, new Properties());
+        stmt = connection.createStatement(ResultSet.TYPE_FORWARD_ONLY,
+                                          ResultSet.CONCUR_READ_ONLY,
+                                          ResultSet.CLOSE_CURSORS_AT_COMMIT);
+    }
+
+    @Test
+    void invoking_next_before_the_last_row_should_return_true() throws Exception {
+        stmt.execute("CREATE TABLE users (id INT PRIMARY KEY, username TEXT);");
+        stmt.execute("INSERT INTO users VALUES (1, 'sinwoo');");
+        stmt.execute("INSERT INTO users VALUES (2, 'seonwoo');");
+
+        // first call to next occur internally
+        stmt.execute("SELECT * FROM users");
+        ResultSet resultSet = stmt.getResultSet();
+
+        assertTrue(resultSet.next());
+    }
+
+    @Test
+    void invoking_next_after_the_last_row_should_return_false() throws Exception {
+        stmt.execute("CREATE TABLE users (id INT PRIMARY KEY, username TEXT);");
+        stmt.execute("INSERT INTO users VALUES (1, 'sinwoo');");
+        stmt.execute("INSERT INTO users VALUES (2, 'seonwoo');");
+
+        // first call to next occur internally
+        stmt.execute("SELECT * FROM users");
+        ResultSet resultSet = stmt.getResultSet();
+
+        while (resultSet.next()) {
+            // this loop will break when resultSet returns false
+        }
+
+        // if the previous call to next() returned false, consecutive call to next() should return false as well
+        assertFalse(resultSet.next());
+    }
+}