added stackTest

I2_Dobble/stackTest.c

@@ -1,5 +1,4 @@
 #include "stack.h"
-<<<<<<< HEAD
 #include "unity/unity.h"
 #include "unity/unity_internals.h"
 
@@ -144,18 +143,97 @@ void test_clearStackFreesMemory(void)
     TEST_ASSERT_NULL(stack);
 }
 */
-=======
-#include "unity.h"
-#include "unity_internals.h"
 
-void setUp(void) { }
-void tearDown(void) { }
->>>>>>> 0c075ea (stackTest file added)
+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();
 
+<<<<<<< HEAD
 <<<<<<< HEAD
     printf("\n============================\n Stack tests\n============================\n");
     printf("-> Create Nodes (push)\n");
@@ -174,5 +252,15 @@ int main()
 
 =======
 >>>>>>> 0c075ea (stackTest file added)
+=======
+    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);
+
+>>>>>>> 0d561c0 (added stackTest)
     return UNITY_END();
 }