[Ch10c] Trying to figure out the code we're actually going to use (a716af49) · Commits · examples / Head First Java 3rd Edition

src/test/java/ch10c/JukeboxQueriesTest.java

+43 −15

Changes for src/test/java/ch10c/JukeboxQueriesTest.java: 43 added lines, 15 removed lines.
Original line number	Diff line number	Diff line
		@@ -38,6 +38,29 @@ class JukeboxQueriesTest {
		System.out.println(result);
		}

		// CANDIDATE
		// REUSE - method references
		// Comparator/sorting; collect
		@Test
		void shouldFindTopFiveSongs() {
		List<Song> allSongs = songs.getSongs();

		// simple
		List<Song> result = allSongs.stream()
		.sorted((o1, o2) -> o2.getTimesPlayed() - o1.getTimesPlayed())
		.limit(5)
		.collect(Collectors.toList());
		System.out.println(result);

		// reuse
		result = allSongs.stream()
		.sorted(Comparator.comparingInt(Song::getTimesPlayed).reversed())
		.limit(5)
		.collect(Collectors.toList());

		System.out.println(result);
		}

		// REGEX
		@Test
		void shouldFindNonStandardCharacters() {
		@@ -78,20 +101,6 @@ class JukeboxQueriesTest {
		System.out.println("genreCount = " + genreCount);
		}

		// PRIMITIVE STREAMS
		@Test
		void shouldQueryForYear() {
		List<Song> allSongs = songs.getSongs();

		// adding distinct changes this
		IntSummaryStatistics result = allSongs.stream()
		.mapToInt(Song::getYear)
		.sorted()
		.summaryStatistics();

		System.out.println("result = " + result);
		}

		// OPTIONAL
		// max terminal
		// Comparator
		@@ -124,6 +133,7 @@ class JukeboxQueriesTest {
		System.out.println("result = " + genreCount);
		}

		// CANDIDATE
		// STRAIGHTFORWARD
		// filter
		// toList
		@@ -150,6 +160,7 @@ class JukeboxQueriesTest {
		System.out.println("result = " + result);
		}

		// CANDIDATE
		// STRAIGHTFORWARD
		// min terminal
		// OPTIONAL
		@@ -177,8 +188,9 @@ class JukeboxQueriesTest {
		System.out.println("result = " + result);
		}

		// CANDIDATE
		@Test
		void shouldFilterMapCollect() {
		void shouldFindAllArtistsForASpecificSong() {
		List<Song> allSongs = songs.getSongs();

		String songTitle = "With a Little Help from My Friends";
		@@ -190,6 +202,7 @@ class JukeboxQueriesTest {
		System.out.println("result = " + result);
		}

		// CANDIDATE
		@Test
		void shouldComplexExample() {
		List<Song> allSongs = songs.getSongs();
		@@ -219,6 +232,21 @@ class JukeboxQueriesTest {
		System.out.println("result = " + result);
		}

		// CANDIDATE
		// PRIMITIVE STREAMS
		@Test
		void shouldQueryForYear() {
		List<Song> allSongs = songs.getSongs();

		// adding distinct changes this
		IntSummaryStatistics result = allSongs.stream()
		.mapToInt(Song::getYear)
		.sorted()
		.summaryStatistics();

		System.out.println("result = " + result);
		}

		// PRIMITIVE STREAMS
		@Test
		void shouldBeAbleToCalculateCountForAllVersionsOfASong() {