diff --git a/img/test.groovy b/img/test.groovy
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--- /dev/null
+++ b/img/test.groovy
@@ -0,0 +1,14 @@
+class StackSpec extends Specification {
+    def "Hinzufügen eines Elementes vergrößert die Größe des Stacks"() { // 1
+     
+        setup: "Eine neue Stack Instanz wird erstellt" // 2
+            def stack = new Stack()
+
+        when: // 3
+            stack.push(42);
+
+        then: //4
+            stack.size() == 1
+    }
+
+}
\ No newline at end of file
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diff --git a/keywords.pptx b/keywords.pptx
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