SortedListCallbackUnitTest+Test4.java

@Test public void testChanges() throws Exception {
    assertThat(fixture.sortedList().size()).isEqualTo(0);
    addArticles();
    assertThat(fixture.callbackRecorder().insertions().size()).isEqualTo(
        fixture.shuffledArticles().size());
    assertThat(fixture.callbackRecorder().deletions().size()).isEqualTo(0);
    assertThat(fixture.callbackRecorder().moves().size()).isEqualTo(0);
    assertThat(fixture.callbackRecorder().changes().size()).isEqualTo(0);

    fixture.callbackRecorder().clear();

    int index = Article.Utils.randomWithRange(0, fixture.sortedList().size() - 1);
    Article article = fixture.sortedList().get(index);
    Article contentChanged =
        article.toBuilder().content(Article.Utils.shuffleString(article.content())).build();
    fixture.sortedList().add(contentChanged);
    Article changed = fixture.sortedList().get(index);
    assertThat(changed.content()).isEqualTo(contentChanged.content());
    assertThat(changed.content()).isNotEqualTo(article.content());

    assertThat(fixture.callbackRecorder().insertions().size()).isEqualTo(0);
    assertThat(fixture.callbackRecorder().deletions().size()).isEqualTo(0);
    assertThat(fixture.callbackRecorder().moves().size()).isEqualTo(0);

    assertThat(fixture.callbackRecorder().changes().size()).isEqualTo(1);
    assertThat(fixture.callbackRecorder().changes().get(0).first).isEqualTo(index);
    assertThat(fixture.callbackRecorder().changes().get(0).second).isEqualTo(1);
}