49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
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/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <gtest/gtest.h>
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#include <sys/param.h>
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TEST(sys_param_test, powerof2_positives) {
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ASSERT_TRUE(powerof2(1));
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ASSERT_TRUE(powerof2(2));
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ASSERT_TRUE(powerof2(4));
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ASSERT_TRUE(powerof2(8));
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ASSERT_FALSE(powerof2(3));
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ASSERT_FALSE(powerof2(5));
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ASSERT_FALSE(powerof2(7));
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ASSERT_FALSE(powerof2(9));
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ASSERT_FALSE(powerof2(10));
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}
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TEST(sys_param_test, powerof2_zero) {
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// 0 isn't a power of 2, but for compatibility, we assume it is.
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ASSERT_TRUE(powerof2(0));
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uint32_t zero = 0;
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ASSERT_TRUE(powerof2(zero));
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}
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TEST(sys_param_test, powerof2_negatives) {
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// negative numbers can never be a power of 2, but for compatibility,
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// we assume they can be.
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int32_t min32 = INT32_MIN;
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int64_t min64 = INT64_MIN;
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ASSERT_TRUE(powerof2(min32));
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ASSERT_FALSE(powerof2(min32 + 1));
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ASSERT_TRUE(powerof2(min64));
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ASSERT_FALSE(powerof2(min64 + 1));
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}
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