From 0d561c017505dbc1bce0c2f68ed82fca55633d57 Mon Sep 17 00:00:00 2001
From: Jonas <urbanjo98912@th-nuernberg.de>
Date: Fri, 21 Nov 2025 12:35:12 +0100
Subject: [PATCH] added stackTest

---
 I2_Dobble/stackTest.c | 93 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)

diff --git a/I2_Dobble/stackTest.c b/I2_Dobble/stackTest.c
index d58dc45..75ef216 100644
--- a/I2_Dobble/stackTest.c
+++ b/I2_Dobble/stackTest.c
@@ -5,9 +5,102 @@
 void setUp(void) { }
 void tearDown(void) { }
 
+void test_push_should_add_new_node_at_top(void)
+{
+    StackNode *stack = NULL;
+
+    int value = 42;
+    stack = push(stack, &value);
+
+    TEST_ASSERT_NOT_NULL(stack);
+    TEST_ASSERT_EQUAL_PTR(&value, stack->data);
+    TEST_ASSERT_NULL(stack->next);
+
+    clearStack(stack);
+}
+
+void test_push_multiple_should_chain_nodes_correctly(void)
+{
+    int a = 1, b = 2;
+    
+    StackNode *first = push(NULL, &a);
+    
+    StackNode *second = push(first, &b);
+
+    TEST_ASSERT_EQUAL_PTR(&b, second->data);
+    TEST_ASSERT_EQUAL_PTR(first, second->next);
+    TEST_ASSERT_EQUAL_PTR(&a, first->data);
+
+    clearStack(second);
+}
+
+void test_top_should_return_null_on_empty_stack(void)
+{
+    StackNode *stack = NULL;
+    TEST_ASSERT_NULL(top(stack));
+}
+
+void test_top_should_return_data_of_existing_node(void)
+{
+    StackNode node;
+    int x = 99;
+
+    node.data = &x;
+    node.next = NULL;
+
+    TEST_ASSERT_EQUAL_PTR(&x, top(&node));
+}
+
+void test_pop_should_return_null_when_stack_empty(void)
+{
+    StackNode *stack = NULL;
+    TEST_ASSERT_NULL(pop(stack));
+}
+
+void test_pop_should_remove_single_element(void)
+{
+    StackNode *stack = malloc(sizeof(StackNode));
+    int x = 7;
+
+    stack->data = &x;
+    stack->next = NULL;
+
+    StackNode *result = pop(stack);
+
+    TEST_ASSERT_NULL(result); // Kein Element mehr übrig
+}
+
+void test_pop_should_remove_top_node_only(void)
+{
+    // Manuell verkettete Liste aufbauen
+    StackNode *n1 = malloc(sizeof(StackNode));
+    StackNode *n2 = malloc(sizeof(StackNode));
+    int a = 1, b = 2;
+
+    n1->data = &a;
+    n1->next = NULL;
+
+    n2->data = &b;
+    n2->next = n1;
+
+    StackNode *result = pop(n2);
+
+    TEST_ASSERT_EQUAL_PTR(n1, result);
+
+    clearStack(result);
+}
+
 int main()
 {
     UNITY_BEGIN();
 
+    RUN_TEST(test_push_should_add_new_node_at_top);
+    RUN_TEST(test_push_multiple_should_chain_nodes_correctly);
+    RUN_TEST(test_top_should_return_null_on_empty_stack);
+    RUN_TEST(test_top_should_return_data_of_existing_node);
+    RUN_TEST(test_pop_should_return_null_when_stack_empty);
+    RUN_TEST(test_pop_should_remove_single_element);
+    RUN_TEST(test_pop_should_remove_top_node_only);
+
     return UNITY_END();
 }
\ No newline at end of file