From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:45:59 +0200
Subject: Adding upstream version 16.2.11+ds.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/seastar/tests/unit/weak_ptr_test.cc | 136 ++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 src/seastar/tests/unit/weak_ptr_test.cc

(limited to 'src/seastar/tests/unit/weak_ptr_test.cc')

diff --git a/src/seastar/tests/unit/weak_ptr_test.cc b/src/seastar/tests/unit/weak_ptr_test.cc
new file mode 100644
index 000000000..769c27481
--- /dev/null
+++ b/src/seastar/tests/unit/weak_ptr_test.cc
@@ -0,0 +1,136 @@
+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership.  You may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/*
+ * Copyright 2016 ScyllaDB
+ */
+
+#define BOOST_TEST_MODULE core
+
+#include <boost/test/included/unit_test.hpp>
+#include <seastar/core/weak_ptr.hh>
+
+using namespace seastar;
+
+class myclass : public weakly_referencable<myclass> {};
+
+static_assert(std::is_nothrow_default_constructible_v<myclass>);
+
+static_assert(std::is_nothrow_default_constructible_v<weak_ptr<myclass>>);
+static_assert(std::is_nothrow_move_constructible_v<weak_ptr<myclass>>);
+
+BOOST_AUTO_TEST_CASE(test_weak_ptr_is_empty_when_default_initialized) {
+    weak_ptr<myclass> wp;
+    BOOST_REQUIRE(!bool(wp));
+}
+
+BOOST_AUTO_TEST_CASE(test_weak_ptr_is_reset) {
+    auto owning_ptr = std::make_unique<myclass>();
+    weak_ptr<myclass> wp = owning_ptr->weak_from_this();
+    BOOST_REQUIRE(bool(wp));
+    BOOST_REQUIRE(&*wp == &*owning_ptr);
+    owning_ptr = {};
+    BOOST_REQUIRE(!bool(wp));
+}
+
+BOOST_AUTO_TEST_CASE(test_weak_ptr_can_be_moved) {
+    auto owning_ptr = std::make_unique<myclass>();
+    weak_ptr<myclass> wp1 = owning_ptr->weak_from_this();
+    weak_ptr<myclass> wp2 = owning_ptr->weak_from_this();
+    weak_ptr<myclass> wp3 = owning_ptr->weak_from_this();
+
+    auto wp3_moved = std::move(wp3);
+    auto wp1_moved = std::move(wp1);
+    auto wp2_moved = std::move(wp2);
+    BOOST_REQUIRE(!bool(wp1));
+    BOOST_REQUIRE(!bool(wp2));
+    BOOST_REQUIRE(!bool(wp3));
+    BOOST_REQUIRE(bool(wp1_moved));
+    BOOST_REQUIRE(bool(wp2_moved));
+    BOOST_REQUIRE(bool(wp3_moved));
+
+    owning_ptr = {};
+
+    BOOST_REQUIRE(!bool(wp1_moved));
+    BOOST_REQUIRE(!bool(wp2_moved));
+    BOOST_REQUIRE(!bool(wp3_moved));
+}
+
+BOOST_AUTO_TEST_CASE(test_multipe_weak_ptrs) {
+    auto owning_ptr = std::make_unique<myclass>();
+
+    weak_ptr<myclass> wp1 = owning_ptr->weak_from_this();
+    BOOST_REQUIRE(bool(wp1));
+    BOOST_REQUIRE(&*wp1 == &*owning_ptr);
+
+    weak_ptr<myclass> wp2 = owning_ptr->weak_from_this();
+    BOOST_REQUIRE(bool(wp2));
+    BOOST_REQUIRE(&*wp2 == &*owning_ptr);
+
+    owning_ptr = {};
+
+    BOOST_REQUIRE(!bool(wp1));
+    BOOST_REQUIRE(!bool(wp2));
+}
+
+BOOST_AUTO_TEST_CASE(test_multipe_weak_ptrs_going_away_first) {
+    auto owning_ptr = std::make_unique<myclass>();
+
+    weak_ptr<myclass> wp1 = owning_ptr->weak_from_this();
+    weak_ptr<myclass> wp2 = owning_ptr->weak_from_this();
+    weak_ptr<myclass> wp3 = owning_ptr->weak_from_this();
+
+    BOOST_REQUIRE(bool(wp1));
+    BOOST_REQUIRE(bool(wp2));
+    BOOST_REQUIRE(bool(wp3));
+
+    wp2 = {};
+
+    owning_ptr = std::make_unique<myclass>();
+
+    BOOST_REQUIRE(!bool(wp1));
+    BOOST_REQUIRE(!bool(wp2));
+    BOOST_REQUIRE(!bool(wp3));
+
+    wp1 = owning_ptr->weak_from_this();
+    wp2 = owning_ptr->weak_from_this();
+    wp3 = owning_ptr->weak_from_this();
+
+    BOOST_REQUIRE(bool(wp1));
+    BOOST_REQUIRE(bool(wp2));
+    BOOST_REQUIRE(bool(wp3));
+
+    wp3 = {};
+    owning_ptr = std::make_unique<myclass>();
+
+    BOOST_REQUIRE(!bool(wp1));
+    BOOST_REQUIRE(!bool(wp2));
+    BOOST_REQUIRE(!bool(wp3));
+
+    wp1 = owning_ptr->weak_from_this();
+    wp2 = owning_ptr->weak_from_this();
+    wp3 = owning_ptr->weak_from_this();
+
+    wp1 = {};
+    wp3 = {};
+    owning_ptr = std::make_unique<myclass>();
+
+    BOOST_REQUIRE(!bool(wp1));
+    BOOST_REQUIRE(!bool(wp2));
+    BOOST_REQUIRE(!bool(wp3));
+}
-- 
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