test: added tests for clear

include/arraylist.h

@@ -7,6 +7,11 @@
 
 typedef struct ArrayList ArrayList;
 
+// FUCK, i forgot one of the main reasons i wanted to
+// implement arrays myself was because i needed 
+// array slices or something like this and i completely
+// forgot, fuck, guess i will implement it once i get
+// the tests done.
 typedef struct {
     ArrayList *array;
     size_t offset;

src/arraylist.c

@@ -64,9 +64,6 @@ ArrayListErr arraylist_clear(ArrayList *arr) {
         return ARRLIST_NULL_ARG;
     }
 
-    memset(arr->buffer, 0, arr->capacity * arr->elem_size);
-    arr->capacity = 0;
-    arr->elem_size = 0;
     arr->len = 0;
     return ARRLIST_OK;
 }

test/test_arraylist.c

@@ -883,6 +883,43 @@ static void test_set_null_data(void **state) {
     arraylist_destroy(&arr);
 }
 
+//Clear
+static void test_clear_non_empty_array(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    for (size_t i = 0; i < 10; i++) {
+        assert_uint_equal(arraylist_push_back(arr, &i), ARRLIST_OK);
+    }
+
+    assert_uint_equal(arraylist_clear(arr), ARRLIST_OK);
+    assert_uint_equal(arraylist_size(arr), 0);
+    assert_uint_equal(arraylist_capacity(arr), 64);
+
+    arraylist_destroy(&arr);
+}
+
+static void test_clear_already_empty_array(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    assert_uint_equal(arraylist_clear(arr), ARRLIST_OK);
+
+    arraylist_destroy(&arr);
+}
+
+static void test_clear_null_array(void **state) {
+    (void) state;
+
+    ArrayList *arr = NULL;
+
+    assert_uint_equal(arraylist_clear(arr), ARRLIST_NULL_ARG);
+}
+
 int main(void) {
     const struct CMUnitTest init[] = {
         cmocka_unit_test(test_init_valid_parameters),
@@ -974,6 +1011,12 @@ int main(void) {
         cmocka_unit_test(test_set_null_data),
     };
 
+    const struct CMUnitTest clear[] = {
+        cmocka_unit_test(test_clear_non_empty_array),
+        cmocka_unit_test(test_clear_already_empty_array),
+        cmocka_unit_test(test_clear_null_array),
+    };
+
     int rc = 0;
 
     rc += cmocka_run_group_tests(init, NULL, NULL);
@@ -987,6 +1030,7 @@ int main(void) {
     rc += cmocka_run_group_tests(remove_at, NULL, NULL);
     rc += cmocka_run_group_tests(get, NULL, NULL);
     rc += cmocka_run_group_tests(set, NULL, NULL);
+    rc += cmocka_run_group_tests(clear, NULL, NULL);
 
     return rc;
 }