Migrating to JUnit5

double-buffer/pom.xml

@@ -36,10 +36,6 @@
     <artifactId>double-buffer</artifactId>
 
     <dependencies>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>

double-buffer/src/test/java/com/iluwatar/doublebuffer/AppTest.java

@@ -23,14 +23,14 @@
 
 package com.iluwatar.doublebuffer;
 
-import org.junit.Test;
-
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
+import org.junit.jupiter.api.Test;
+
 /**
  * App unit test.
  */
-public class AppTest {
+class AppTest {
 
   /**
    * Issue: Add at least one assertion to this test case.
@@ -40,7 +40,7 @@ public class AppTest {
    */
 
   @Test
-  public void shouldExecuteApplicationWithoutException() {
+  void shouldExecuteApplicationWithoutException() {
     assertDoesNotThrow(() -> App.main(new String[]{}));
   }
 

double-buffer/src/test/java/com/iluwatar/doublebuffer/FrameBufferTest.java

@@ -23,17 +23,19 @@
 
 package com.iluwatar.doublebuffer;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
 import java.util.Arrays;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * FrameBuffer unit test.
  */
-public class FrameBufferTest {
+class FrameBufferTest {
 
   @Test
-  public void testClearAll() {
+  void testClearAll() {
     try {
       var field = FrameBuffer.class.getDeclaredField("pixels");
       var pixels = new Pixel[FrameBuffer.HEIGHT * FrameBuffer.WIDTH];
@@ -43,14 +45,14 @@ public void testClearAll() {
       field.setAccessible(true);
       field.set(frameBuffer, pixels);
       frameBuffer.clearAll();
-      Assert.assertEquals(Pixel.WHITE, frameBuffer.getPixels()[0]);
+      assertEquals(Pixel.WHITE, frameBuffer.getPixels()[0]);
     } catch (NoSuchFieldException | IllegalAccessException e) {
-      Assert.fail("Fail to modify field access.");
+      fail("Fail to modify field access.");
     }
   }
 
   @Test
-  public void testClear() {
+  void testClear() {
     try {
       var field = FrameBuffer.class.getDeclaredField("pixels");
       var pixels = new Pixel[FrameBuffer.HEIGHT * FrameBuffer.WIDTH];
@@ -60,21 +62,21 @@ public void testClear() {
       field.setAccessible(true);
       field.set(frameBuffer, pixels);
       frameBuffer.clear(0, 0);
-      Assert.assertEquals(Pixel.WHITE, frameBuffer.getPixels()[0]);
+      assertEquals(Pixel.WHITE, frameBuffer.getPixels()[0]);
     } catch (NoSuchFieldException | IllegalAccessException e) {
-      Assert.fail("Fail to modify field access.");
+      fail("Fail to modify field access.");
     }
   }
 
   @Test
-  public void testDraw() {
+  void testDraw() {
     var frameBuffer = new FrameBuffer();
     frameBuffer.draw(0, 0);
-    Assert.assertEquals(Pixel.BLACK, frameBuffer.getPixels()[0]);
+    assertEquals(Pixel.BLACK, frameBuffer.getPixels()[0]);
   }
 
   @Test
-  public void testGetPixels() {
+  void testGetPixels() {
     try {
       var field = FrameBuffer.class.getDeclaredField("pixels");
       var pixels = new Pixel[FrameBuffer.HEIGHT * FrameBuffer.WIDTH];
@@ -83,9 +85,9 @@ public void testGetPixels() {
       var frameBuffer = new FrameBuffer();
       field.setAccessible(true);
       field.set(frameBuffer, pixels);
-      Assert.assertEquals(pixels, frameBuffer.getPixels());
+      assertEquals(pixels, frameBuffer.getPixels());
     } catch (NoSuchFieldException | IllegalAccessException e) {
-      Assert.fail("Fail to modify field access.");
+      fail("Fail to modify field access.");
     }
   }
 

double-buffer/src/test/java/com/iluwatar/doublebuffer/SceneTest.java

@@ -23,17 +23,19 @@
 
 package com.iluwatar.doublebuffer;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+
 import java.util.ArrayList;
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * Scene unit tests.
  */
-public class SceneTest {
+class SceneTest {
 
   @Test
-  public void testGetBuffer() {
+  void testGetBuffer() {
     try {
       var scene = new Scene();
       var field1 = Scene.class.getDeclaredField("current");
@@ -46,14 +48,14 @@ public void testGetBuffer() {
       var field2 = Scene.class.getDeclaredField("frameBuffers");
       field2.setAccessible(true);
       field2.set(scene, frameBuffers);
-      Assert.assertEquals(frameBuffer, scene.getBuffer());
+      assertEquals(frameBuffer, scene.getBuffer());
     } catch (NoSuchFieldException | IllegalAccessException e) {
-      Assert.fail("Fail to access private field.");
+      fail("Fail to access private field.");
     }
   }
 
   @Test
-  public void testDraw() {
+  void testDraw() {
     try {
       var scene = new Scene();
       var field1 = Scene.class.getDeclaredField("current");
@@ -63,10 +65,10 @@ public void testDraw() {
       field2.setAccessible(true);
       field2.set(scene, 1);
       scene.draw(new ArrayList<>());
-      Assert.assertEquals(1, field1.get(scene));
-      Assert.assertEquals(0, field2.get(scene));
+      assertEquals(1, field1.get(scene));
+      assertEquals(0, field2.get(scene));
     } catch (NoSuchFieldException | IllegalAccessException e) {
-      Assert.fail("Fail to access private field");
+      fail("Fail to access private field");
     }
   }
 }