test: added tests for pop_back

test/test_arraylist.c

@@ -254,6 +254,7 @@ static void test_push_back_null_data(void **state) {
     arraylist_destroy(&arr);
 }
 
+// Push front
 static void test_push_front_single_element(void **state) {
     (void) state;
 
@@ -408,6 +409,101 @@ static void test_insert_null_data(void **state) {
     arraylist_destroy(&arr);
 }
 
+// Pop back
+static void test_pop_back_single_element(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    for (int i = 0; i < 10; i++) {
+        assert_uint_equal(arraylist_push_back(arr, &i), ARRLIST_OK);
+    }
+
+    int m;
+    assert_uint_equal(arraylist_pop_back(arr, &m), ARRLIST_OK);
+    assert_uint_equal(m, 9);
+
+    arraylist_destroy(&arr);
+}
+
+static void test_pop_back_multiple_elements(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    for (int i = 0; i < 10; i++) {
+        assert_uint_equal(arraylist_push_back(arr, &i), ARRLIST_OK);
+    }
+
+    int m;
+    for (int i = 9; i >= 5; i--) {
+        assert_uint_equal(arraylist_pop_back(arr, &m), ARRLIST_OK);
+        assert_uint_equal(arraylist_size(arr), i);
+        assert_uint_equal(m, i);
+    }
+
+    arraylist_destroy(&arr);
+}
+
+static void test_pop_back_until_empty(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    for (int i = 0; i < 10; i++) {
+        assert_uint_equal(arraylist_push_back(arr, &i), ARRLIST_OK);
+    }
+
+    int m;
+    for (int i = 9; i >= 0; i--) {
+        assert_uint_equal(arraylist_pop_back(arr, &m), ARRLIST_OK);
+        assert_uint_equal(arraylist_size(arr), i);
+        assert_uint_equal(m, i);
+    }
+
+    assert_uint_equal(arraylist_pop_back(arr, &m), ARRLIST_EMPTY);
+
+    arraylist_destroy(&arr);
+}
+
+static void test_pop_back_empty_array(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    int n;
+    assert_uint_equal(arraylist_pop_back(arr, &n), ARRLIST_EMPTY);
+
+    arraylist_destroy(&arr);
+}
+
+static void test_pop_back_null_array(void **state) {
+    (void) state;
+
+    ArrayList *arr = NULL;
+
+    int n;
+    assert_uint_equal(arraylist_pop_back(arr, &n), ARRLIST_NULL_ARG);
+}
+
+static void test_pop_back_null_out(void **state) {
+    (void) state;
+
+    ArrayList *arr = arraylist_init(64, sizeof(int));
+    assert_non_null(arr);
+
+    int n = 8;
+    assert_uint_equal(arraylist_push_back(arr, &n), ARRLIST_OK);
+
+    assert_uint_equal(arraylist_pop_back(arr, NULL), ARRLIST_OK);
+
+    arraylist_destroy(&arr);
+}
+
 int main(void) {
     const struct CMUnitTest init[] = {
         cmocka_unit_test(test_init_valid_parameters),
@@ -454,6 +550,15 @@ int main(void) {
         cmocka_unit_test(test_insert_null_data),
     };
 
+    const struct CMUnitTest pop_back[] = {
+        cmocka_unit_test(test_pop_back_single_element),
+        cmocka_unit_test(test_pop_back_multiple_elements),
+        cmocka_unit_test(test_pop_back_until_empty),
+        cmocka_unit_test(test_pop_back_empty_array),
+        cmocka_unit_test(test_pop_back_null_array),
+        cmocka_unit_test(test_pop_back_null_out),
+    };
+
     int rc = 0;
 
     rc += cmocka_run_group_tests(init, NULL, NULL);
@@ -462,6 +567,7 @@ int main(void) {
     rc += cmocka_run_group_tests(push_back, NULL, NULL);
     rc += cmocka_run_group_tests(push_front, NULL, NULL);
     rc += cmocka_run_group_tests(insert, NULL, NULL);
+    rc += cmocka_run_group_tests(pop_back, NULL, NULL);
 
     return rc;
 }