assertEquals("Reference should be equals 'RFC 6020'.", "RFC 6020", patternConstraint.getReference());
assertEquals("Regular expression should be equls '\\D'.", "\\D", patternConstraint.getRegularExpression());
assertNotEquals("Hash codes shouldn't be equals.", patternConstraint.hashCode(), patternConstraint2.hashCode());
assertEquals("Reference should be equals 'RFC 6020'.", "RFC 6020", patternConstraint.getReference());
assertEquals("Regular expression should be equls '\\D'.", "\\D", patternConstraint.getRegularExpression());
assertNotEquals("Hash codes shouldn't be equals.", patternConstraint.hashCode(), patternConstraint2.hashCode());