### Question:
SQLMergeClause extends AbstractSQLClause<SQLMergeClause> implements StoreClause<SQLMergeClause> { @Override public void clear() { batches.clear(); columns.clear(); values.clear(); keys.clear(); subQuery = null; } SQLMergeClause(Connection connection, SQLTemplates templates, RelationalPath<?> entity);  SQLMergeClause(Connection connection, Configuration configuration, RelationalPath<?> entity);  SQLMergeClause(Provider<Connection> connection, Configuration configuration, RelationalPath<?> entity); SQLMergeClause addFlag(Position position, String flag); SQLMergeClause addFlag(Position position, Expression<?> flag); SQLMergeClause addBatch(); @Override void clear(); SQLMergeClause columns(Path<?>... columns); @SuppressWarnings("unchecked") @Nullable T executeWithKey(Path<T> path); T executeWithKey(Class<T> type); @SuppressWarnings("unchecked") List<T> executeWithKeys(Path<T> path); List<T> executeWithKeys(Class<T> type); ResultSet executeWithKeys(); @Override long execute(); @Override List<SQLBindings> getSQL(); SQLMergeClause keys(Path<?>... paths); SQLMergeClause select(SubQueryExpression<?> subQuery); @Override SQLMergeClause set(Path<T> path, @Nullable T value); @Override SQLMergeClause set(Path<T> path, Expression<? extends T> expression); @Override SQLMergeClause setNull(Path<T> path); @Override String toString(); SQLMergeClause values(Object... v); @Override boolean isEmpty(); @Override int getBatchCount();  }### Answer:
@Test public void clear() { KeyAccessorsTest.QEmployee emp1 = new KeyAccessorsTest.QEmployee("emp1"); SQLMergeClause merge = new SQLMergeClause(null, new H2Templates(), emp1); merge.set(emp1.id, 1); merge.addBatch(); assertEquals(1, merge.getBatchCount()); merge.clear(); assertEquals(0, merge.getBatchCount()); }