53 lines
3.0 KiB
C
53 lines
3.0 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/math.h"
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#include "libc/testlib/testlib.h"
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long double x, y, z;
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COMBO(x, pos1) { x = +1.3L; }
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COMBO(x, pos2) { x = +2.3L; }
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COMBO(y, pos1) { y = +1.3L; }
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COMBO(y, pos2) { y = +2.3L; }
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COMBO(z, pi) { z = M_PI; }
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COMBO(z, e) { z = M_E; }
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TEST(powl, lolgebra) {
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/* EXPECT_LDBL_EQ(1, powl(x, 0)); */
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/* EXPECT_LDBL_EQ(x, powl(x, 1)); */
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/* EXPECT_LDBL_EQ(powl(x, -1), 1.0L / x); */
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/* EXPECT_LDBL_EQ(powl(x, 0.5), sqrtl(x)); */
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/* EXPECT_LDBL_EQ(powl(x, y) * powl(x, z), powl(x, y + z)); */
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/* EXPECT_LDBL_EQ(powl(x, y) * powl(z, y), powl(x * z, y)); */
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/* EXPECT_LDBL_EQ(powl(x, y) / x, powl(x, y - 1)); */
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/* EXPECT_LDBL_EQ(x / powl(y, z), x * powl(y, -z)); */
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/* EXPECT_LDBL_EQ(powi(x, 0), 1); */
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/* EXPECT_LDBL_EQ(powi(x, 1), x); */
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/* EXPECT_LDBL_EQ(powi(x, -1), 1 / x); */
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/* EXPECT_LDBL_EQ(powi(1, x), 1); */
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/* EXPECT_LDBL_EQ(powi(x, y) * powi(z, y), powi(x * z, y)); */
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}
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TEST(powl, testConstants) {
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EXPECT_LDBL_EQ(16, powl(2, 4));
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/* TODO(jart): We need a better AlmostEqual() */
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/* EXPECT_LDBL_EQ(3.347061799072891e+62, powl(1337.31337, 20)); */
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}
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