added stackTest

I2_Dobble/bintree.c

@@ -8,11 +8,51 @@
     * `treeSize`: zählt die Knoten im Baum (rekursiv),
     * `nextTreeData`: Traversierung mit Hilfe des zuvor implementierten Stacks. */
 
+static StackNode *iteratorStack = NULL;
+
 // Adds a copy of data's pointer destination to the tree using compareFct for ordering. Accepts duplicates
 // if isDuplicate is NULL, otherwise ignores duplicates and sets isDuplicate to 1 (or to 0 if a new entry is added).
 TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFctType compareFct, int *isDuplicate)
 {
+    if (root == NULL)
+    {
+        // Neue Node anlegen
+        TreeNode *newNode = malloc(sizeof(TreeNode));
+        if (!newNode) return NULL;
 
+        newNode->data = malloc(dataSize);
+        if(!newNode->data)
+        {
+            free(newNode);
+            return NULL;
+        }
+
+        memcpy(newNode->data, data, dataSize);
+
+        newNode->left = NULL;
+        newNode->right = NULL;
+
+        if (isDuplicate)
+            *isDuplicate = 0;
+
+        return newNode;
+    }
+
+    int cmp = compareFct(data, root->data);
+
+    if (cmp == 0)
+    {
+        if (isDuplicate)
+            *isDuplicate = 1;
+        return root;  // Einfügen verhindern
+    }
+
+    if (cmp < 0)
+        root->left = addToTree(root->left, data, dataSize, compareFct, isDuplicate);
+    else
+        root->right = addToTree(root->right, data, dataSize, compareFct, isDuplicate);
+
+    return root;
 }
 
 // Iterates over the tree given by root. Follows the usage of strtok. If tree is NULL, the next entry of the last tree given is returned in ordering direction.
@@ -20,17 +60,58 @@ TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFc
 // push the top node and push all its left nodes.
 void *nextTreeData(TreeNode *root)
 {
+    // Neues Traversieren?
+    if (root != NULL)
+    {
+        clearStack(iteratorStack);
+        iteratorStack = NULL;
 
+        // Root + alle linken Nachfolger pushen
+        TreeNode *current = root;
+        while (current != NULL)
+        {
+            iteratorStack = push(iteratorStack, current);
+            current = current->left;
+        }
+    }
+
+    // Wenn Stack leer → fertig
+    if (iteratorStack == NULL)
+        return NULL;
+
+    // Top-Node holen
+    TreeNode *node = (TreeNode *)top(iteratorStack);
+    iteratorStack = pop(iteratorStack);
+
+    // rechten Teilbaum + linke Kette pushen
+    TreeNode *right = node->right;
+    while (right != NULL)
+    {
+        iteratorStack = push(iteratorStack, right);
+        right = right->left;
+    }
+
+    return node->data;
 }
 
 // Releases all memory resources (including data copies).
 void clearTree(TreeNode *root)
 {
+    if (root != NULL)
+    {
+        clearTree(root->left);
+        clearTree(root->right);
 
+        free(root->data);
+        free(root);
+    }
 }
 
 // Returns the number of entries in the tree given by root.
 unsigned int treeSize(const TreeNode *root)
 {
+    if (root == NULL)
+        return 0;
 
+    return 1 + treeSize(root->left) + treeSize(root->right);
 }

I2_Dobble/bintreeTest.c

@@ -0,0 +1,119 @@
+#include "unity.h"
+#include "bintree.h"
+#include <stdlib.h>
+
+static int compare(const void *a, const void *b)
+{
+    return (*(int *)a > *(int *)b) - (*(int *)a < *(int *)b);
+}
+
+void setUp(void) { }
+void tearDown(void) { }
+
+void test_addToTree_single_element(void)
+{
+    TreeNode *root = NULL;
+    int value = 10;
+    int dup = -1;
+
+    root = addToTree(root, &value, sizeof(int), compare, &dup);
+
+    TEST_ASSERT_NOT_NULL(root);
+    TEST_ASSERT_EQUAL_INT(10, *(int*)root->data);
+    TEST_ASSERT_EQUAL_INT(0, dup);    // neuer Eintrag
+
+    clearTree(root);
+}
+
+void test_addToTree_multiple_elements_and_size(void)
+{
+    TreeNode *root = NULL;
+    int values[] = {5, 3, 7, 1, 4};
+    int dup = -1;
+
+    for (int i = 0; i < 5; i++)
+        root = addToTree(root, &values[i], sizeof(int), compare, &dup);
+
+    TEST_ASSERT_EQUAL_UINT(5, treeSize(root));
+
+    clearTree(root);
+}
+
+void test_addToTree_duplicate_detection(void)
+{
+    TreeNode *root = NULL;
+    int val = 42;
+    int dup;
+
+    root = addToTree(root, &val, sizeof(int), compare, &dup);
+    TEST_ASSERT_EQUAL(0, dup);
+
+    addToTree(root, &val, sizeof(int), compare, &dup);
+    TEST_ASSERT_EQUAL(1, dup);
+
+    clearTree(root);
+}
+
+void test_treeSize_empty_tree_detection(void)
+{
+    TEST_ASSERT_EQUAL_UINT(0, treeSize(NULL));
+}
+
+void test_nextTreeData_returns_inorder(void)
+{
+    TreeNode *root = NULL;
+    int values[] = {5, 3, 7, 2, 4, 6, 8};
+
+    // Einfügen
+    for (int i = 0; i < 7; i++)
+        root = addToTree(root, &values[i], sizeof(int), compare, NULL);
+
+    /* Erwartete Reihenfolge (inorder): 2,3,4,5,6,7,8 */
+    int expected[] = {2,3,4,5,6,7,8};
+
+    int idx = 0;
+    void *p = nextTreeData(root);   // Iterator starten
+
+    while (p != NULL)
+    {
+        TEST_ASSERT_EQUAL_INT(expected[idx], *(int*)p);
+        idx++;
+        p = nextTreeData(NULL);     // Fortsetzen mit NULL
+    }
+
+    TEST_ASSERT_EQUAL(7, idx); //alle Einträge geprüft
+
+    clearTree(root);
+}
+
+void test_treeSize_returns_correct_size()
+{
+    TreeNode *root = NULL;
+    int values[] = {8, 3, 10, 1, 6, 14};
+
+    // ersten Baum aufbauen
+    for (int i = 0; i < 6; i++)
+        root = addToTree(root, &values[i], sizeof(int), compare, NULL);
+
+    TEST_ASSERT_EQUAL_UINT(6, treeSize(root));
+
+    // Baum löschen
+    clearTree(root);
+    root = NULL;
+
+    TEST_ASSERT_EQUAL_UINT(0, treeSize(root));
+}
+
+int main(void)
+{
+    UNITY_BEGIN();
+
+    RUN_TEST(test_addToTree_single_element);
+    RUN_TEST(test_addToTree_multiple_elements_and_size);
+    RUN_TEST(test_addToTree_duplicate_detection);
+    RUN_TEST(test_treeSize_empty_tree_detection);
+    RUN_TEST(test_nextTreeData_returns_inorder);
+    RUN_TEST(test_treeSize_returns_correct_size);
+
+    return UNITY_END();
+}

I2_Dobble/makefile

@@ -28,29 +28,38 @@ doble_initial:
 program_obj_files = stack.o bintree.o numbers.o timer.o highscore.o
 
 doble : main.o $(program_obj_files)
-	$(CC) $(FLAGS) $(LDFLAGS) $^ -o doble
+	$(CC) $(CFLAGS) $(LDFLAGS) $^ -o doble
 
-$(program_obj_filesobj_files): %.o: %.c
-	$(CC) -c $(FLAGS) $^ -o $@
+$(program_obj_files): %.o: %.c
+	$(CC) -c $(CFLAGS) $^ -o $@
 
 # --------------------------
 # Unit Tests
 # --------------------------
-unitTests: numbersTest
+unity_src = $(unityfolder)/unity.c
+
+unitTests: numbersTest stackTest bintreeTest
 	./runNumbersTest
+	./runStackTest
+	./runBintreeTest
 
-numbersTest: numbers.o bintree.o numbersTest.o $($(unityfolder)/unity.c)
-	$(CC) $(FLAGS) $(LDFLAGS) $^ -o $@
+numbersTest: numbers.o bintree.o stack.o numbersTest.c $(unity_src) stack.o
+	$(CC) $(CFLAGS) $(LDFLAGS) -I$(unityfolder) $^ -o runNumbersTest
 
+stackTest: stack.o stackTest.c $(unity_src)
+	$(CC) $(CFLAGS) $(LDFLAGS) -I$(unityfolder) $^ -o runStackTest
+
+bintreeTest: bintree.o bintreeTest.c $(unity_src) stack.o
+	$(CC) $(CFLAGS) $(LDFLAGS) -I$(unityfolder) $^ -o runBintreeTest
 %.o: %.c
-	$(CC) -c $(FLAGS) $< -o $@
+	$(CC) -c $(CFLAGS) $< -o $@
 
 # --------------------------
 # Clean
 # --------------------------
 clean:
 ifeq ($(OS),Windows_NT)
-	del /f *.o doble runNumbersTest doble_initial
+	del /f *.o doble  doble_initial runNumbersTest runStackTest runBintreeTest
 else
-	rm -f *.o doble runNumbersTest doble_initial
+	rm -f *.o doble doble_initial runNumbersTest runStackTest runBintreeTest
 endif

I2_Dobble/numbersTest.c

@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include "numbers.h"
 #include "unity.h"
 #include "unity_internals.h"
@@ -75,6 +76,9 @@ void test_complete_function_of_numbers(void)
     free(arr);
 }
 
+void setUp(void) { }
+void tearDown(void) { }
+
 int main(void) 
 {
     UNITY_BEGIN();

I2_Dobble/stack.c

@@ -10,24 +10,47 @@
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data)
 {
+    StackNode *newNode = malloc(sizeof(StackNode));
+    if (!newNode)
+        return stack;
+    
+    newNode->data = data;
+    newNode->next = stack;
 
+    return newNode;
 }
 
 // Deletes the top element of the stack (latest added element) and releases its memory. (Pointer to data has to be
 // freed by caller.)
 StackNode *pop(StackNode *stack)
 {
+    if(stack == NULL)
+        return NULL;
+    
+    StackNode *newTopElement = stack->next;
+    free(stack);
 
+    return newTopElement;
 }
 
 // Returns the data of the top element.
 void *top(StackNode *stack)
 {
+    if (!stack)
+        return NULL;
 
+    return stack->data;
 }
 
 // Clears stack and releases all memory.
 void clearStack(StackNode *stack)
 {
+    StackNode *current = stack;
 
+    while (current)
+    {
+        StackNode *next = current->next;
+        free(current);
+        current = next;
+    }
 }

I2_Dobble/stack.h

@@ -8,6 +8,11 @@ The latest element is taken from the stack. */
 #include <stdlib.h>
 
 //TODO: passenden Datentyp als struct anlegen
+typedef struct stack
+{
+    void *data;
+    struct stack *next;
+} StackNode;
 
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data);

I2_Dobble/stackTest.c

@@ -0,0 +1,106 @@
+#include "stack.h"
+#include "unity.h"
+#include "unity_internals.h"
+
+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();
+}