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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /mfbt/tests/gtest/TestReverseIterator.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'mfbt/tests/gtest/TestReverseIterator.cpp')
-rw-r--r--mfbt/tests/gtest/TestReverseIterator.cpp104
1 files changed, 104 insertions, 0 deletions
diff --git a/mfbt/tests/gtest/TestReverseIterator.cpp b/mfbt/tests/gtest/TestReverseIterator.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gtest/gtest.h"
+
+#include "mozilla/ReverseIterator.h"
+
+using namespace mozilla;
+
+TEST(ReverseIterator, Const_RangeBasedFor)
+{
+ const std::vector<int> in = {1, 2, 3, 4};
+ const auto reversedRange =
+ detail::IteratorRange<ReverseIterator<std::vector<int>::const_iterator>>{
+ ReverseIterator{in.end()}, ReverseIterator{in.begin()}};
+
+ const std::vector<int> expected = {4, 3, 2, 1};
+ std::vector<int> out;
+ for (auto i : reversedRange) {
+ out.emplace_back(i);
+ }
+
+ EXPECT_EQ(expected, out);
+}
+
+TEST(ReverseIterator, NonConst_RangeBasedFor)
+{
+ std::vector<int> in = {1, 2, 3, 4};
+ auto reversedRange =
+ detail::IteratorRange<ReverseIterator<std::vector<int>::iterator>>{
+ ReverseIterator{in.end()}, ReverseIterator{in.begin()}};
+
+ const std::vector<int> expected = {-1, -2, -3, -4};
+ for (auto& i : reversedRange) {
+ i = -i;
+ }
+
+ EXPECT_EQ(expected, in);
+}
+
+TEST(ReverseIterator, Difference)
+{
+ const std::vector<int> in = {1, 2, 3, 4};
+ using reverse_iterator = ReverseIterator<std::vector<int>::const_iterator>;
+
+ reverse_iterator rbegin = reverse_iterator{in.end()},
+ rend = reverse_iterator{in.begin()};
+ EXPECT_EQ(4, rend - rbegin);
+ EXPECT_EQ(0, rend - rend);
+ EXPECT_EQ(0, rbegin - rbegin);
+
+ --rend;
+ EXPECT_EQ(3, rend - rbegin);
+
+ ++rbegin;
+ EXPECT_EQ(2, rend - rbegin);
+
+ rend--;
+ EXPECT_EQ(1, rend - rbegin);
+
+ rbegin++;
+ EXPECT_EQ(0, rend - rbegin);
+}
+
+TEST(ReverseIterator, Comparison)
+{
+ const std::vector<int> in = {1, 2, 3, 4};
+ using reverse_iterator = ReverseIterator<std::vector<int>::const_iterator>;
+
+ reverse_iterator rbegin = reverse_iterator{in.end()},
+ rend = reverse_iterator{in.begin()};
+ EXPECT_TRUE(rbegin < rend);
+ EXPECT_FALSE(rend < rbegin);
+ EXPECT_FALSE(rend < rend);
+ EXPECT_FALSE(rbegin < rbegin);
+
+ EXPECT_TRUE(rend > rbegin);
+ EXPECT_FALSE(rbegin > rend);
+ EXPECT_FALSE(rend > rend);
+ EXPECT_FALSE(rbegin > rbegin);
+
+ EXPECT_TRUE(rbegin <= rend);
+ EXPECT_FALSE(rend <= rbegin);
+ EXPECT_TRUE(rend <= rend);
+ EXPECT_TRUE(rbegin <= rbegin);
+
+ EXPECT_TRUE(rend >= rbegin);
+ EXPECT_FALSE(rbegin >= rend);
+ EXPECT_TRUE(rend >= rend);
+ EXPECT_TRUE(rbegin >= rbegin);
+
+ EXPECT_FALSE(rend == rbegin);
+ EXPECT_FALSE(rbegin == rend);
+ EXPECT_TRUE(rend == rend);
+ EXPECT_TRUE(rbegin == rbegin);
+
+ EXPECT_TRUE(rend != rbegin);
+ EXPECT_TRUE(rbegin != rend);
+ EXPECT_FALSE(rend != rend);
+ EXPECT_FALSE(rbegin != rbegin);
+}