@Test
public void testTwoLikes() {
SparseVector vec = sum.summarize(History.forUser(42, Like.create(42, 39), Like.create(42, 67)));
assertThat(vec.size(), equalTo(2));
assertThat(vec.get(39), equalTo(1.0));
assertThat(vec.get(67), equalTo(1.0));
}
@Test
public void testLikeBatch() {
SparseVector vec =
sum.summarize(
History.forUser(
42, Like.create(42, 39), LikeBatch.create(42, 67, 402), Like.create(42, 39)));
assertThat(vec.size(), equalTo(2));
assertThat(vec.get(39), equalTo(2.0));
assertThat(vec.get(67), equalTo(402.0));
}
@Test
public void testSummarizeNoLike() {
SparseVector vec = sum.summarize(History.forUser(42, Rating.create(42, 39, 2.5)));
assertThat(vec.size(), equalTo(0));
}
@Test
public void testSummarizeEmpty() {
SparseVector vec = sum.summarize(History.forUser(42));
assertThat(vec.size(), equalTo(0));
}