@Test
public void hashCodesAreEqualForEquivalentObjects() {
// Arrange:
final GroupElement g1 = MathUtils.getRandomGroupElement();
final GroupElement g2 = MathUtils.toRepresentation(g1, GroupElement.Representation.P2);
final GroupElement g3 = MathUtils.toRepresentation(g1, GroupElement.Representation.P1P1);
final GroupElement g4 = MathUtils.getRandomGroupElement();
// Assert
Assert.assertThat(g2.hashCode(), IsEqual.equalTo(g1.hashCode()));
Assert.assertThat(g3.hashCode(), IsEqual.equalTo(g1.hashCode()));
Assert.assertThat(g1.hashCode(), IsNot.not(IsEqual.equalTo(g4.hashCode())));
Assert.assertThat(g2.hashCode(), IsNot.not(IsEqual.equalTo(g4.hashCode())));
Assert.assertThat(g3.hashCode(), IsNot.not(IsEqual.equalTo(g4.hashCode())));
}
@Test
public void equalsOnlyReturnsTrueForEquivalentObjects() {
// Arrange:
final GroupElement g1 = MathUtils.getRandomGroupElement();
final GroupElement g2 = MathUtils.toRepresentation(g1, GroupElement.Representation.P2);
final GroupElement g3 = MathUtils.toRepresentation(g1, GroupElement.Representation.CACHED);
final GroupElement g4 = MathUtils.toRepresentation(g1, GroupElement.Representation.P1P1);
final GroupElement g5 = MathUtils.getRandomGroupElement();
// Assert
Assert.assertThat(g2, IsEqual.equalTo(g1));
Assert.assertThat(g3, IsEqual.equalTo(g1));
Assert.assertThat(g1, IsEqual.equalTo(g4));
Assert.assertThat(g1, IsNot.not(IsEqual.equalTo(g5)));
Assert.assertThat(g2, IsNot.not(IsEqual.equalTo(g5)));
Assert.assertThat(g3, IsNot.not(IsEqual.equalTo(g5)));
Assert.assertThat(g5, IsNot.not(IsEqual.equalTo(g4)));
}