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Add test for o3tl::saturating_add

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Change-Id: I19bb1d566bd80f859810b4023d965c8fd80b98f2
This commit is contained in:
Stephan Bergmann 2017-10-26 21:30:08 +02:00
parent 1061875d67
commit 7cc8b8254f
2 changed files with 120 additions and 0 deletions
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1
o3tl/CppunitTest_o3tl_tests.mk
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@ -31,6 +31,7 @@ $(eval $(call gb_CppunitTest_add_exception_objects,o3tl_tests,\
o3tl/qa/test-cow_wrapper \
o3tl/qa/test-enumarray \
o3tl/qa/test-lru_map \
o3tl/qa/test-safeint \
o3tl/qa/test-sorted_vector \
o3tl/qa/test-string_view \
o3tl/qa/test-typed_flags \

119
o3tl/qa/test-safeint.cxx Normal file
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@ -0,0 +1,119 @@
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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 <sal/config.h>
#include <limits>
#include <cppunit/TestAssert.h>
#include <cppunit/TestFixture.h>
#include <cppunit/extensions/HelperMacros.h>
#include <o3tl/safeint.hxx>
namespace {
class Test: public CppUnit::TestFixture {
private:
CPPUNIT_TEST_SUITE(Test);
CPPUNIT_TEST(testSignedSaturatingAdd);
CPPUNIT_TEST(testUnsignedSaturatingAdd);
CPPUNIT_TEST_SUITE_END();
void testSignedSaturatingAdd() {
auto const min = std::numeric_limits<int>::min();
auto const max = std::numeric_limits<int>::max();
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min, min));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min, min + 1));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min, -1));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min, 0));
CPPUNIT_ASSERT_EQUAL(min + 1, o3tl::saturating_add(min, 1));
CPPUNIT_ASSERT_EQUAL(min + max - 1, o3tl::saturating_add(min, max - 1));
CPPUNIT_ASSERT_EQUAL(min + max, o3tl::saturating_add(min, max));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min + 1, min));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min + 1, min + 1));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min + 1, -1));
CPPUNIT_ASSERT_EQUAL(min + 1, o3tl::saturating_add(min + 1, 0));
CPPUNIT_ASSERT_EQUAL(min + 2, o3tl::saturating_add(min + 1, 1));
CPPUNIT_ASSERT_EQUAL(min + max, o3tl::saturating_add(min + 1, max - 1));
CPPUNIT_ASSERT_EQUAL(min + max + 1, o3tl::saturating_add(min + 1, max));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(-1, min));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(-1, min + 1));
CPPUNIT_ASSERT_EQUAL(-2, o3tl::saturating_add(-1, -1));
CPPUNIT_ASSERT_EQUAL(-1, o3tl::saturating_add(-1, 0));
CPPUNIT_ASSERT_EQUAL(0, o3tl::saturating_add(-1, 1));
CPPUNIT_ASSERT_EQUAL(max - 2, o3tl::saturating_add(-1, max - 1));
CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(-1, max));
CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(0, min));
CPPUNIT_ASSERT_EQUAL(min + 1, o3tl::saturating_add(0, min + 1));
CPPUNIT_ASSERT_EQUAL(-1, o3tl::saturating_add(0, -1));
CPPUNIT_ASSERT_EQUAL(0, o3tl::saturating_add(0, 0));
CPPUNIT_ASSERT_EQUAL(1, o3tl::saturating_add(0, 1));
CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(0, max - 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(0, max));
CPPUNIT_ASSERT_EQUAL(min + 1, o3tl::saturating_add(1, min));
CPPUNIT_ASSERT_EQUAL(min + 2, o3tl::saturating_add(1, min + 1));
CPPUNIT_ASSERT_EQUAL(0, o3tl::saturating_add(1, -1));
CPPUNIT_ASSERT_EQUAL(1, o3tl::saturating_add(1, 0));
CPPUNIT_ASSERT_EQUAL(2, o3tl::saturating_add(1, 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(1, max - 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(1, max));
CPPUNIT_ASSERT_EQUAL(min + max - 1, o3tl::saturating_add(max - 1, min));
CPPUNIT_ASSERT_EQUAL(min + max, o3tl::saturating_add(max - 1, min + 1));
CPPUNIT_ASSERT_EQUAL(max - 2, o3tl::saturating_add(max - 1, -1));
CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(max - 1, 0));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, max - 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, max));
CPPUNIT_ASSERT_EQUAL(min + max, o3tl::saturating_add(max, min));
CPPUNIT_ASSERT_EQUAL(min + max + 1, o3tl::saturating_add(max, min + 1));
CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(max, -1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, 0));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, max - 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, max));
}
void testUnsignedSaturatingAdd() {
auto const max = std::numeric_limits<unsigned int>::max();
CPPUNIT_ASSERT_EQUAL(0U, o3tl::saturating_add(0U, 0U));
CPPUNIT_ASSERT_EQUAL(1U, o3tl::saturating_add(0U, 1U));
CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(0U, max - 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(0U, max));
CPPUNIT_ASSERT_EQUAL(1U, o3tl::saturating_add(1U, 0U));
CPPUNIT_ASSERT_EQUAL(2U, o3tl::saturating_add(1U, 1U));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(1U, max - 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(1U, max));
CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(max - 1, 0U));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, 1U));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, max - 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, max));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, 0U));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, 1U));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, max - 1));
CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, max));
}
};
CPPUNIT_TEST_SUITE_REGISTRATION(Test);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */