feat: adds unit test fwhile correcting methods in main

Author: kksaunders251

lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/tiktokvideosystem/TiktokVideo.java

@@ -69,6 +69,10 @@ public void addComments(String comment) {
     commentsList.add(comment);
   }
 
+  public ArrayList<String> getCommentsList() {
+    return commentsList;
+  }
+
   public String getCreator() {
     return this.creatorName;
   }

lesson_16/objects/objects_app/src/test/java/com/codedifferently/lesson16/tiktokvideosystem/TiktokVideoTest.java

@@ -1,7 +1,12 @@
 package com.codedifferently.lesson16.tiktokvideosystem;
 
-import org.hamcrest.MatcherAssert.assertThat.assertEquals;
-import org.hamcrest.Matchers.is;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import com.codedifferently.lesson16.tiktokvideosystem.TiktokVideo.VideoCategory;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.util.ArrayList;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
@@ -20,30 +25,93 @@ void testConstructor() {
     TiktokVideo video = new TiktokVideo("Jane", 3000, 1000, VideoCategory.DANCE);
   }
 
+  @Test
+  void testSetAndGetVideoCategory() {
+    tiktokVideo.setVideoCategory(VideoCategory.COMEDY);
+    assertEquals(VideoCategory.COMEDY, tiktokVideo.getVideoCategory());
+  }
+
   @Test
   void getVideoCategory() {
     assertEquals(TiktokVideo.VideoCategory.VLOG, tiktokVideo.getVideoCategory());
   }
 
+  @Test
+  void testViewsCount() {
+    assertEquals(1000000, tiktokVideo.getViewsCount());
+  }
+
   @Test
   void testIncreaseViewsPositive() {
     tiktokVideo.increaseViews(500);
     // got the is matcher idea from chat gpt
-    assertThat(tiktokVideo.getViewsCount(), is(1500));
+    assertEquals(1000500, tiktokVideo.getViewsCount());
   }
 
   @Test
   void testDecreaseViewsNegative() {
-    tiktokVideo.InvalidViewIncrementException(-78);
-    assertThrows(InvalidViewIncrementException.class, () -> tiktokVideo);
+    // tiktokVideo.InvalidViewIncrementException(-78);
+    // assertThrows(InvalidViewIncrementException.class, () -> tiktokVideo);
+    InvalidViewIncrementException exception =
+        assertThrows(
+            InvalidViewIncrementException.class,
+            () -> {
+              tiktokVideo.increaseViews(-1);
+            });
+    assertEquals("View increase amount must be positive.", exception.getMessage());
   }
 
   @Test
-  String showCommennts() {}
+  void testDisplayComments() {
+    // used google & chat for this unit test solution
+    // Arrange
+    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+    PrintStream printStream = new PrintStream(outputStream);
+    PrintStream originalOut = System.out;
+    System.setOut(printStream);
+
+    ArrayList<String> comments = new ArrayList<>();
+    comments.add("Love this video!");
+    comments.add("So funny");
+    tiktokVideo.displayComments(comments);
+    System.setOut(originalOut);
+    String output = outputStream.toString().trim();
+    String expectedOutput = "Love this video!\nSo funny";
+    assertEquals(expectedOutput, output);
+  }
+
+  @Test
+  void testDisplayCommentsWithNullList() {
+    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+    PrintStream printStream = new PrintStream(outputStream);
+    PrintStream originalOut = System.out;
+    System.setOut(printStream);
+
+    tiktokVideo.displayComments(null);
+
+    System.setOut(originalOut);
+
+    String output = outputStream.toString().trim();
+    assertEquals("No comments yet. Be the first to comment!", output);
+  }
 
   @Test
   void getCreatorName() {
+    assertEquals("enigivensunday", tiktokVideo.getCreator());
+  }
 
-    assertEquals(TiktokVideo.String, tiktokVideo.getCreator());
+  @Test
+  void testAddComments() {
+    tiktokVideo.addComments("This is awesome!");
+
+    assertEquals("This is awesome!", tiktokVideo.getCommentsList().get(0));
+  }
+
+  @Test
+  void testLikeToViewRatio() {
+    // Create the object using the constructor with views and likes
+    double result = tiktokVideo.likeToViewRatio();
+    assertEquals(
+        0.5, result, 0.0001); // got the idea to Use delta for comparing doubles from chatGpt
   }
 }