### Question:
AllMatchExpression extends UpdateQueryExpression { @Override public int hashCode() { return 5; }  @Override JsonNode toJson(); @Override int hashCode(); @Override boolean equals(Object obj);  }### Answer:
@Test public void testEqualsHashCode() { AllMatchExpression instance = new AllMatchExpression(); assertEquals(new AllMatchExpression().hashCode(), instance.hashCode()); assertEquals(new AllMatchExpression(), instance); }