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51 lines
2.7 KiB
C
51 lines
2.7 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ 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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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/conv/conv.h"
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#include "libc/conv/sizemultiply.h"
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#include "libc/limits.h"
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#include "libc/testlib/testlib.h"
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size_t out;
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TEST(sizemultiply, testMultiplication) {
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EXPECT_TRUE(sizemultiply(&out, 7, 11));
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EXPECT_EQ(7 * 11, out);
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EXPECT_TRUE(sizemultiply(&out, 11, 7));
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EXPECT_EQ(7 * 11, out);
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EXPECT_TRUE(sizemultiply(&out, 0, 11));
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EXPECT_EQ(0 * 11, out);
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EXPECT_TRUE(sizemultiply(&out, 11, 0));
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EXPECT_EQ(0 * 11, out);
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}
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TEST(sizemultiply, testOverflow_alwaysReturnsSizeMax) {
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EXPECT_FALSE(sizemultiply(&out, 7, SIZE_MAX));
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EXPECT_EQ(SIZE_MAX, out);
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EXPECT_FALSE(sizemultiply(&out, SIZE_MAX, 7));
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EXPECT_EQ(SIZE_MAX, out);
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}
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TEST(sizemultiply, testOverflow_closeButNoCigar) {
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EXPECT_TRUE(sizemultiply(&out, SIZE_MAX, 1));
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EXPECT_EQ(SIZE_MAX, out);
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EXPECT_TRUE(sizemultiply(&out, 1, SIZE_MAX));
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EXPECT_EQ(SIZE_MAX, out);
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}
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