Fakultaet rechner mit Test

src/main/java/src/TasksFrame.java

@@ -100,6 +100,8 @@ public class TasksFrame extends JFrame {
 
     }
 
+
+
     private void setupExponent() {
 
         JPanel jPanel = setupPanel("Potenzrechner");
@@ -732,6 +734,8 @@ public class TasksFrame extends JFrame {
 
     }
 
+
+
     public int calcArea(int a, int b)
     {
         int area = a * b;
@@ -745,7 +749,6 @@ public class TasksFrame extends JFrame {
     }
 
 
-
     public void setupSumFromTo(){
 
         JPanel jPanel = setupPanel("Sum from to");
@@ -797,6 +800,18 @@ public class TasksFrame extends JFrame {
     return sum+to;
     }
 
+    public int Fakultaet(int a){
+        int sum = 0;
+        int faku=1;
+        while ( sum <a ) {
+            sum = sum + 1 ;
+            faku = faku * sum ;
+        }
+        if(sum == 0){
+            faku = 0;
+        }
+        return faku;
+    }
 
 
 

src/test/java/src/TasksFrameTest.java

@@ -7,12 +7,24 @@ import static org.junit.jupiter.api.Assertions.*;
 class TasksFrameTest {
 
     @Test
-    void setupLeibnizR() {
+    void setupPI() {
         TasksFrame tasksFrame = new TasksFrame();
         double x = tasksFrame.setupPI(100000);
         assertEquals(Math.PI, x*4, 0.0001, "Die Werte sind unterschiedlich. Soll: 0.785 Ist:" +x*4);
     }
 
+    @Test
+    void setupFakult()
+    {
+        TasksFrame tasksFrame = new TasksFrame();
+        int x = tasksFrame.Fakultaet(5);
+        assertEquals(120,x);
+        int x2 = tasksFrame.Fakultaet(1);
+        assertEquals(1,x2);
+        int x3 = tasksFrame.Fakultaet(0);
+        assertEquals(0,x3);
+    }
+
     @Test
     void setupDiff(){
         TasksFrame frame = new TasksFrame();