test/util/TestIntrusiveForwardList: new unit test

test/util/TestIntrusiveForwardList.cxx

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2022 Max Kellermann <max.kellermann@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "util/IntrusiveForwardList.hxx"
+
+#include <gtest/gtest.h>
+
+#include <string>
+
+namespace {
+
+struct CharItem final : IntrusiveForwardListHook {
+	char ch;
+
+	constexpr CharItem(char _ch) noexcept:ch(_ch) {}
+};
+
+static std::string
+ToString(const IntrusiveForwardList<CharItem> &list) noexcept
+{
+	std::string result;
+	for (const auto &i : list)
+		result.push_back(i.ch);
+	return result;
+}
+
+} // anonymous namespace
+
+TEST(IntrusiveForwardList, Basic)
+{
+	using Item = CharItem;
+
+	Item items[]{'a', 'b', 'c'};
+
+	IntrusiveForwardList<CharItem> list;
+	ASSERT_EQ(ToString(list), "");
+	list.reverse();
+	ASSERT_EQ(ToString(list), "");
+
+	for (auto &i : items)
+		list.push_front(i);
+
+	ASSERT_EQ(ToString(list), "cba");
+
+	list.reverse();
+	ASSERT_EQ(ToString(list), "abc");
+
+	list.pop_front();
+	ASSERT_EQ(ToString(list), "bc");
+	list.reverse();
+	ASSERT_EQ(ToString(list), "cb");
+}

test/util/meson.build

@@ -5,6 +5,7 @@ test(
     'TestCircularBuffer.cxx',
     'TestDivideString.cxx',
     'TestException.cxx',
+    'TestIntrusiveForwardList.cxx',
     'TestIntrusiveList.cxx',
     'TestMimeType.cxx',
     'TestSplitString.cxx',