60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
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/*
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* Copyright (C) 2012 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 <stdlib.h>
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TEST(stdlib, drand48) {
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srand48(0x01020304);
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EXPECT_DOUBLE_EQ(0.65619299195623526, drand48());
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EXPECT_DOUBLE_EQ(0.18522597229772941, drand48());
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EXPECT_DOUBLE_EQ(0.42015087072844537, drand48());
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EXPECT_DOUBLE_EQ(0.061637783047395089, drand48());
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}
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TEST(stdlib, lrand48_random_rand) {
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srand48(0x01020304);
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EXPECT_EQ(1409163720, lrand48());
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EXPECT_EQ(397769746, lrand48());
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EXPECT_EQ(902267124, lrand48());
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EXPECT_EQ(132366131, lrand48());
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#if __BIONIC__
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// On bionic, random(3) is equivalent to lrand48...
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srandom(0x01020304);
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EXPECT_EQ(1409163720, random());
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EXPECT_EQ(397769746, random());
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EXPECT_EQ(902267124, random());
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EXPECT_EQ(132366131, random());
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// ...and rand(3) is the bottom 32 bits.
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srand(0x01020304);
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EXPECT_EQ(static_cast<int>(1409163720), rand());
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EXPECT_EQ(static_cast<int>(397769746), rand());
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EXPECT_EQ(static_cast<int>(902267124), rand());
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EXPECT_EQ(static_cast<int>(132366131), rand());
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#endif
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}
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TEST(stdlib, mrand48) {
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srand48(0x01020304);
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EXPECT_EQ(-1476639856, mrand48());
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EXPECT_EQ(795539493, mrand48());
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EXPECT_EQ(1804534249, mrand48());
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EXPECT_EQ(264732262, mrand48());
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}
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