### Question:
SpelAttributeConverter implements AttributeConverter<Expression, String> { @Override public Expression convertToEntityAttribute(String s) { if (s == null) { s = ""; } return PARSER.parseExpression(s); }  @Override String convertToDatabaseColumn(Expression expression); @Override Expression convertToEntityAttribute(String s);  }### Answer:
@Test public void shouldConvertToEntityAttribute() { String expected = "true && true"; Expression result = attributeConverter.convertToEntityAttribute(expected); assertEquals(expected, result.getExpressionString()); }