feat: created FootballTeam object class w/ custom exception (code-dif…

…ferently#538)

* feat: created footballteam object class w/ custom exception

* fix: ran gradle commadn to fix violations

lesson_16/objects/objects_app/src/main/java/com/codedifferently/footballteamobject/DuplicatePlayerException.java

@@ -0,0 +1,7 @@
+package com.codedifferently.footballteamobject;
+
+public class DuplicatePlayerException extends Exception {
+  public DuplicatePlayerException(String message) {
+    super(message);
+  }
+}

lesson_16/objects/objects_app/src/main/java/com/codedifferently/footballteamobject/FootballTeam.java

@@ -0,0 +1,106 @@
+package com.codedifferently.footballteamobject;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class FootballTeam {
+
+  public static class DuplicatePlayerException extends Exception {
+    public DuplicatePlayerException(String message) {
+      super(message);
+    }
+  }
+
+  private int playerCount;
+  private int jerseyNumber50AndOver;
+  private int jerseyNumberUnder50;
+  private Map<Integer, String> players = new HashMap<>();
+  private final String teamName;
+  private final String location;
+  private final Conference conference;
+
+  public FootballTeam(
+      String teamName, String location, Conference conference, Map<Integer, String> players) {
+    this.teamName = teamName;
+    this.location = location;
+    this.conference = conference;
+    this.players = players;
+  }
+
+  public enum Conference {
+    // Power Five Conferences
+    ACC,
+    BIG_12,
+    BIG_10,
+    PAC_12,
+    SEC,
+    // Group of Five Conferences
+    AMERICAN,
+    CONFERENCE_USA,
+    MAC,
+    MOUNTAIN_WEST,
+    SUN_BELT
+  }
+
+  public boolean isPowerFive() {
+    if (conference == Conference.ACC
+        || conference == Conference.BIG_12
+        || conference == Conference.BIG_10
+        || conference == Conference.PAC_12
+        || conference == Conference.SEC) {
+      return true;
+    }
+    return false;
+  }
+
+  public String getTeamName() {
+    return teamName;
+  }
+
+  public String getLocation() {
+    return location;
+  }
+
+  public Conference getConference() {
+    return conference;
+  }
+
+  public int getPlayerCount() {
+    return playerCount;
+  }
+
+  public Map<Integer, String> getPlayers() {
+    return players;
+  }
+
+  public void addPlayer(int number, String name) throws DuplicatePlayerException {
+    if (players.containsKey(number)) {
+      throw new DuplicatePlayerException("A player with that number already exists.");
+    }
+    players.put(number, name);
+    playerCount++;
+  }
+
+  public void removePlayer(int number) {
+    players.remove(number);
+    playerCount--;
+  }
+
+  public void tallyJerseyNumbers() {
+    for (Map.Entry<Integer, String> entry : players.entrySet()) {
+      if (entry.getKey() < 50) {
+        jerseyNumberUnder50++;
+      } else {
+        jerseyNumber50AndOver++;
+      }
+    }
+  }
+
+  public int getJerseyNumber50AndOver() {
+    return jerseyNumber50AndOver;
+  }
+
+  public int getJerseyNumberUnder50() {
+    return jerseyNumberUnder50;
+  }
+}

lesson_16/objects/objects_app/src/test/java/com/codedifferently/footballteamobject/FootballTeamTest.java

@@ -0,0 +1,98 @@
+package com.codedifferently.footballteamobject;
+
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import com.codedifferently.footballteamobject.FootballTeam.Conference;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class FootballTeamTest {
+  FootballTeam team;
+  private Map<Integer, String> players;
+
+  @BeforeEach
+  void setUp() {
+    team = new FootballTeam("Alabama", "Tuscaloosa", FootballTeam.Conference.SEC, new HashMap<>());
+    players = new HashMap<>();
+    players.put(2, "Derrick Henry");
+  }
+
+  @Test
+  public void testGetTeamName_ReturnsCorrectName() {
+    assertEquals("Alabama", team.getTeamName());
+  }
+
+  @Test
+  public void testGetTeamName_ReturnsNonNull() {
+    assertNotNull(team.getTeamName());
+  }
+
+  @Test
+  public void testAddPlayer() throws FootballTeam.DuplicatePlayerException {
+    team.addPlayer(1, "John Doe");
+    assertEquals(1, team.getPlayerCount());
+    assertEquals("John Doe", team.getPlayers().get(1));
+  }
+
+  @Test
+  public void testRemovePlayer() throws FootballTeam.DuplicatePlayerException {
+    team.addPlayer(1, "John Doe");
+    team.removePlayer(1);
+    assertEquals(0, team.getPlayerCount());
+    assertFalse(team.getPlayers().containsKey(1));
+  }
+
+  @Test
+  public void testTallyJerseyNumbers_Under50() throws FootballTeam.DuplicatePlayerException {
+    team.addPlayer(1, "Player 1");
+    team.tallyJerseyNumbers();
+    assertEquals(1, team.getJerseyNumberUnder50());
+  }
+
+  @Test
+  public void testPowerFiveConferences() {
+    FootballTeam team = new FootballTeam("Team Name", "Location", Conference.ACC, new HashMap<>());
+    assertTrue(team.isPowerFive());
+    team = new FootballTeam("Team Name", "Location", Conference.BIG_12, new HashMap<>());
+    assertTrue(team.isPowerFive());
+    team = new FootballTeam("Team Name", "Location", Conference.BIG_10, new HashMap<>());
+    assertTrue(team.isPowerFive());
+    team = new FootballTeam("Team Name", "Location", Conference.PAC_12, new HashMap<>());
+    assertTrue(team.isPowerFive());
+    team = new FootballTeam("Team Name", "Location", Conference.SEC, new HashMap<>());
+    assertTrue(team.isPowerFive());
+  }
+
+  @Test
+  public void testGroupOfFiveConferences() {
+    FootballTeam team =
+        new FootballTeam("Team Name", "Location", Conference.AMERICAN, new HashMap<>());
+    assertFalse(team.isPowerFive());
+    team = new FootballTeam("Team Name", "Location", Conference.CONFERENCE_USA, new HashMap<>());
+    assertFalse(team.isPowerFive());
+    team = new FootballTeam("Team Name", "Location", Conference.MAC, new HashMap<>());
+    assertFalse(team.isPowerFive());
+    team = new FootballTeam("Team Name", "Location", Conference.MOUNTAIN_WEST, new HashMap<>());
+    assertFalse(team.isPowerFive());
+    team = new FootballTeam("Team Name", "Location", Conference.SUN_BELT, new HashMap<>());
+    assertFalse(team.isPowerFive());
+  }
+
+  @Test
+  void testDuplicatePlayerException() {
+    String message = "A player with that number already exists.";
+    DuplicatePlayerException exception = new DuplicatePlayerException(message);
+    assertThatThrownBy(
+            () -> {
+              throw exception;
+            })
+        .isInstanceOf(DuplicatePlayerException.class)
+        .hasMessage(message);
+  }
+}