Steuer 19% Berechner

src/main/java/src/TasksFrame.java

@@ -240,6 +240,13 @@ public class TasksFrame extends JFrame {
         return roundOff;
     }
 
+    public double steuer19(double x)
+    {
+        double steuer=0;
+        steuer = (x * 0.19) / 1.19;
+        return steuer;
+    }
+
     private void setupUmrechnen() {
 
         JPanel jPanel = setupPanel("Dezimal nach Binär");

src/test/java/src/TasksFrameTest.java

@@ -38,6 +38,17 @@ class TasksFrameTest {
 
     }
 
+    @Test
+    void setupSteuer19(){
+        TasksFrame tasksFrame = new TasksFrame();
+        double x = tasksFrame.steuer19(1190);
+        assertEquals(190,x, 0.01);
+        double x2 = tasksFrame.steuer19(250);
+        assertEquals(39.92,x2,0.01);
+        double x3 = tasksFrame.steuer19(0);
+        assertEquals(0,x3,0.01);
+    }
+
     @Test
     void setupDiff(){
         TasksFrame frame = new TasksFrame();