Test-Code for CDPlayer-Method [Louder] produced.

src/test/java/device/cdPlayer/CDPlayerTest.java

@@ -1,47 +1,43 @@
 package device.cdPlayer;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.mockito.junit.jupiter.MockitoExtension;
 
-import static org.junit.jupiter.api.Assertions.*;
+import java.util.stream.Stream;
 
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+@ExtendWith(MockitoExtension.class)
 class CDPlayerTest {
-/*
-    @Test
-    void louder() {
-    }
-
-    @Test
-    void quieter() {
-    }
-
-    @Test
-    void getVolume() {
-    }
-
-    @Test
-    void next() {
-    }
 
-    @Test
-    void prev() {
+    @ParameterizedTest
+    @MethodSource("louderTestData")
+    void louderTest(String testName,String testDirection, CDPlayer _cdPlayer,int anzClicks, int expectedResult) {
+        for (int i = 0; i < anzClicks; i++) {
+            _cdPlayer.louder();
         }
-
-    @Test
-    void getInfoText() {
+        if(testDirection.equals("VolumeIncreased")){
+            assertThat(_cdPlayer.getVolume()).describedAs(testName).isEqualTo(expectedResult);
         }
-
-    @Test
-    void getOptions() {
+        if(testDirection.equals("VolumeHasChanged")){
+            assertThat(_cdPlayer.getVolume()).describedAs(testName).isNotEqualTo(expectedResult);
+        }if(testDirection.equals("VolumeNotDecreased")){
+            assertThat(_cdPlayer.getVolume()).describedAs(testName).isNotEqualTo(expectedResult);
         }
-
-    @Test
-    void chooseOption() {
     }
 
-    @Test
-    void play() {
+    static Stream<Arguments> louderTestData () {
+        CDPlayer cdPlayer=new CDPlayer();
+        return Stream.of(
+                Arguments.of("[getVolume() after 20x louder() ] => VolumeIncreased","VolumeIncreased", cdPlayer, 20, 20),
+                Arguments.of("[getVolume() after 2x louder() ] => VolumeHasChanged","VolumeHasChanged" ,cdPlayer,2,0),
+                Arguments.of("[getVolume() after 5x louder() ] => VolumeDecreased","VolumeNotDecreased", cdPlayer,5,-5)
+        );
     }
 
- */
 
 }