@Test
public void test_equals() {
StringTextComparator baseCmp = StringTextComparator.IGNORE_WHITESPACE;
RollingHashSequence<StringText> a =
RollingHashSequence.wrap(new StringText("line0 \n line1 \n line2"), baseCmp, 1);
RollingHashSequence<StringText> b =
RollingHashSequence.wrap(new StringText("line0 \n line1 \n line2 \n line3"), baseCmp, 1);
RollingHashSequenceComparator<StringText> cmp =
new RollingHashSequenceComparator<StringText>(baseCmp);
assertThat(cmp.equals(a, 0, b, 0)).isTrue();
assertThat(cmp.equals(a, 1, b, 1)).isTrue();
assertThat(cmp.equals(a, 2, b, 2)).isFalse();
}
@Test
public void test_hash() {
StringText seq = new StringText("line0 \n line1 \n line2");
StringTextComparator cmp = StringTextComparator.IGNORE_WHITESPACE;
RollingHashSequence<StringText> seq2 = RollingHashSequence.wrap(seq, cmp, 1);
RollingHashSequenceComparator<StringText> cmp2 =
new RollingHashSequenceComparator<StringText>(cmp);
assertThat(seq2.length()).isEqualTo(3);
assertThat(cmp2.hash(seq2, 0)).isEqualTo(cmp.hash(seq, 0) * 31 + cmp.hash(seq, 1));
assertThat(cmp2.hash(seq2, 1))
.isEqualTo((cmp.hash(seq, 0) * 31 + cmp.hash(seq, 1)) * 31 + cmp.hash(seq, 2));
assertThat(cmp2.hash(seq2, 2)).isEqualTo((cmp.hash(seq, 1) * 31 + cmp.hash(seq, 2)) * 31);
}