public static String formatExpression(final Expression expression) {
    return formatExpression(expression, FormatOptions.of(s -> false));
  }
@Test
  public void shouldFormatInPredicate() {
    final InPredicate predicate = new InPredicate(
        new StringLiteral("foo"),
        new InListExpression(ImmutableList.of(new StringLiteral("a"))));

    assertThat(ExpressionFormatter.formatExpression(predicate), equalTo("('foo' IN ('a'))"));
  }