refactor dynamic array: fix index check in array_set_value and add test for adding elements

src/dynamic_array.c

@@ -47,7 +47,7 @@ void *array_get_value(const Array *p_array, const size_t index) {
 }
 
 void array_set_value(Array *p_array, const size_t index, const void *value) {
-    if (index > p_array->capacity) {
+    if ((index + 1) > p_array->capacity) {
         size_t new_size = p_array->capacity;
         while (index >= new_size) {
             new_size *= 2;

src/test_dynamic_array.c

@@ -339,6 +339,27 @@ void test_array_set_value_as_invalid_type(void) {
 }
 
 
+void test_adding_elements(void) {
+    typedef struct {
+        int value;
+    } Element;
+
+    Array *p_array = array_create(&(ArrayCreateOptions){
+        .initial_size = 10,
+        .element_size = sizeof(Element)
+    });
+
+    int number_of_elements = 1000;
+
+    for (int index = 0; index < number_of_elements; index++) {
+        Element element = { index };
+        array_set_value(p_array, index, &element);
+    }
+
+    TEST_ASSERT_EQUAL(array_get_size(p_array), number_of_elements);
+}
+
+
 int main(void)
 {
     UNITY_BEGIN();
@@ -367,6 +388,7 @@ int main(void)
     RUN_TEST(test_array_get_value_as_invalid_type);
     RUN_TEST(test_array_set_value_as);
     RUN_TEST(test_array_set_value_as_invalid_type);
+    RUN_TEST(test_adding_elements);
 
     return UNITY_END();
 }