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leaderboard: getTop10Players returns the 10 players with the most points sorted by points

leaderboard
Tobias Krause 3 years ago
committed by Lorenz Hohmann
parent
commit
c325e68dbd
  1. 21
      src/main/java/de/tims/leaderboard/Leaderboard.java
  2. 17
      src/test/java/de/tims/leaderboard/LeaderboardTest.java

21
src/main/java/de/tims/leaderboard/Leaderboard.java

@ -17,8 +17,25 @@ public class Leaderboard {
public Player[] getTop10Players() {
Player[] top10Players = new Player[NUM_PLAYERS_ON_LEADERBOARD];
for (int i = 0; i < allPlayers.size() && i < NUM_PLAYERS_ON_LEADERBOARD; i++) {
top10Players[i] = allPlayers.get(i);
for (Player actualPlayer : allPlayers) {
for (int i = 0; i < NUM_PLAYERS_ON_LEADERBOARD; i++) {
if (top10Players[i] == null) {
top10Players[i] = actualPlayer;
break;
} else if (actualPlayer.getPoints() > top10Players[i].getPoints()) {
Player playerToInsert = actualPlayer;
Player tmp;
for (int j = i; j < NUM_PLAYERS_ON_LEADERBOARD; j++) {
tmp = top10Players[j];
top10Players[j] = playerToInsert;
playerToInsert = tmp;
}
break;
}
}
}
return top10Players;

17
src/test/java/de/tims/leaderboard/LeaderboardTest.java

@ -40,7 +40,22 @@ class LeaderboardTest {
"TestPlayer",
new Player[] {new Player("Eins", 140), new Player("Zwei", 130), new Player("Drei", 120), new Player("Vier", 110),
new Player("Fuenf", 100), new Player("Sechs", 90), new Player("Sieben", 80), new Player("Acht", 70),
new Player("Neun", 60), new Player("Zehn", 50)}));
new Player("Neun", 60), new Player("Zehn", 50)}),
Arguments.of("UnsortedListWithLessThan10ElementsReturnsElementsSortedByPoints",
List.of(new Player("Eins", 20), new Player("Zwei", 30), new Player("Drei", 10), new Player("Vier", 60),
new Player("Fuenf", 50), new Player("Sechs", 90)),
"TestPlayer",
new Player[] {new Player("Sechs", 90), new Player("Vier", 60), new Player("Fuenf", 50), new Player("Zwei", 30),
new Player("Eins", 20), new Player("Drei", 10), null, null, null, null}),
Arguments.of("UnsortedListWithMoreThan10ElementsReturns10ElementsWithMostPointsSortedByPoints",
List.of(new Player("Eins", 0), new Player("Zwei", 130), new Player("Drei", 20), new Player("Vier", 10),
new Player("Fuenf", 20), new Player("Sechs", 70), new Player("Sieben", 60), new Player("Acht", 20),
new Player("Neun", 60), new Player("Zehn", 50), new Player("Elf", 90), new Player("Zwoelf", 20),
new Player("Dreizehn", 40), new Player("Vierzehn", 80)),
"TestPlayer",
new Player[] {new Player("Zwei", 130), new Player("Elf", 90), new Player("Vierzehn", 80), new Player("Sechs", 70),
new Player("Sieben", 60), new Player("Neun", 60), new Player("Zehn", 50), new Player("Dreizehn", 40),
new Player("Drei", 20), new Player("Fuenf", 20)}));
}
}
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