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1ac28b7818
As the test comment explains, this test is not quite valid, but preserving the exact sequences helps distributions to port to newer glibc versions. We can remove this test if we ever switch to a different implementation. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
57 lines
2 KiB
C
57 lines
2 KiB
C
/* Test that rand () evaluates to a special expected sequence.
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Copyright (C) 2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This test is borderline invalid because the rand function is not
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guaranteed to produce the same sequence of numbers on every
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architecture or glibc build. However, some software packages have
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test suites that depend on the specific sequence of numbers return
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here, so this test verifies that they do not change unexpectedly. */
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#include <stdlib.h>
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#include <support/check.h>
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static int
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do_test (void)
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{
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TEST_COMPARE (rand (), 1804289383);
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TEST_COMPARE (rand (), 846930886);
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TEST_COMPARE (rand (), 1681692777);
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TEST_COMPARE (rand (), 1714636915);
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TEST_COMPARE (rand (), 1957747793);
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TEST_COMPARE (rand (), 424238335);
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TEST_COMPARE (rand (), 719885386);
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TEST_COMPARE (rand (), 1649760492);
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TEST_COMPARE (rand (), 596516649);
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TEST_COMPARE (rand (), 1189641421);
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srand (1009);
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TEST_COMPARE (rand (), 176208083);
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TEST_COMPARE (rand (), 1650100842);
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TEST_COMPARE (rand (), 1813188575);
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TEST_COMPARE (rand (), 2064804480);
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TEST_COMPARE (rand (), 1944264725);
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TEST_COMPARE (rand (), 1673642853);
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TEST_COMPARE (rand (), 1582759448);
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TEST_COMPARE (rand (), 309901569);
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TEST_COMPARE (rand (), 444031692);
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TEST_COMPARE (rand (), 1926035991);
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return 0;
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}
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#include <support/test-driver.c>
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