Started working on tests, added config to makefile

makefile

@@ -35,7 +35,9 @@ $(program_obj_filesobj_files): %.o: %.c
 # --------------------------
 # Unit Tests
 # --------------------------
-unitTests:
+stackTests: stack.o test_stack.c $(unityfolder)/unity.c
+	$(CC) $(CFLAGS) -I$(unityfolder) -o runStackTests test_stack.c stack.o $(unityfolder)/unity.c
+
 	echo "needs to be implemented"
 
 # --------------------------

test_stack.c

@@ -0,0 +1,27 @@
+#include "stack.h"
+#include "unity.h"
+
+
+void test_firstNodeAddedCorrectly(void) {
+    StackNode* modelStack;
+    int modelData = 5;
+    modelStack->below = NULL;
+    modelStack->data = &modelData;
+
+    StackNode* testStack = NULL;
+    int testData = 5;
+    testStack = push(testStack, &testData);
+    TEST_ASSERT_EQUAL_INT(*(modelStack->data), *(testStack->data));
+    TEST_ASSERT_NULL(testStack->below);
+}
+
+
+int main(void) {
+
+    UNITY_BEGIN();
+
+    printf("\n----------------------------Stack-Tests----------------------------\n");
+    RUN_TEST(test_firstNodeAddedCorrectly);
+
+    return UNITY_END();
+}