/**
* Test method for {@link DivisionExpression#equals(java.lang.Object)} and {@link
* DivisionExpression#hashCode()}. Asserts that:
*
* <ul>
* <li>All and only expressions with equal divisor and dividend are equal
* <li>{@code hashCode} is implemented accordingly
* </ul>
*/
@Test
public void equalsAndHashCode() {
final DivisionExpression equalOne =
new DivisionExpression(
EVALUABLE_EXPRESSION_FACTORY.getAll()[0], EVALUABLE_EXPRESSION_FACTORY.getAll()[1]);
final DivisionExpression equalTwo =
new DivisionExpression(
EVALUABLE_EXPRESSION_FACTORY.getAll()[0], EVALUABLE_EXPRESSION_FACTORY.getAll()[1]);
final DivisionExpression differentDivident =
new DivisionExpression(
EVALUABLE_EXPRESSION_FACTORY.getAll()[2], EVALUABLE_EXPRESSION_FACTORY.getAll()[1]);
final DivisionExpression differentDivisor =
new DivisionExpression(
EVALUABLE_EXPRESSION_FACTORY.getAll()[0], EVALUABLE_EXPRESSION_FACTORY.getAll()[2]);
final DivisionExpression swapped =
new DivisionExpression(
EVALUABLE_EXPRESSION_FACTORY.getAll()[1], EVALUABLE_EXPRESSION_FACTORY.getAll()[0]);
assertThat(equalOne, hasDefaultEqualsProperties());
assertThat(
"expressions with equal divisor and divident should be equal",
equalOne,
is(equalTo(equalTwo)));
assertThat(equalOne.hashCode(), is(equalTwo.hashCode()));
assertThat(
"expressions with different dividents must not be equal",
equalOne,
is(not(equalTo(differentDivident))));
assertThat(
"expressions with different divisors must not be equal",
equalOne,
is(not(equalTo(differentDivisor))));
assertThat(
"expressions with different dividends and divisiors must not be equal",
equalOne,
is(not(equalTo(swapped))));
}
