1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*
* Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @library /test/lib
* @build Tests
* @run main SqrtTests
* @bug 8302040
* @summary Tests for {Math, StrictMath}.sqrt
*/
public class SqrtTests {
private SqrtTests(){}
public static void main(String... argv) {
int failures = 0;
failures += testSqrt();
if (failures > 0) {
System.err.println("Testing sqrt incurred "
+ failures + " failures.");
throw new RuntimeException();
}
}
private static final double InfinityD = Double.POSITIVE_INFINITY;
private static final double NaNd = Double.NaN;
/**
* "Returns the correctly rounded positive square root of a double value. Special cases:
*
* If the argument is NaN or less than zero, then the result is NaN.
*
* If the argument is positive infinity, then the result is positive infinity.
*
* If the argument is positive zero or negative zero, then the
* result is the same as the argument.
*
* Otherwise, the result is the double value closest to the true
* mathematical square root of the argument value."
*/
private static int testSqrt() {
int failures = 0;
for(double nan : Tests.NaNs) {
failures += testSqrtCase(nan, NaNd);
}
double [][] testCases = {
{InfinityD, InfinityD},
{-Double.MIN_VALUE, NaNd},
{-Double.MIN_NORMAL, NaNd},
{-Double.MAX_VALUE, NaNd},
{-InfinityD, NaNd},
{+0.0, +0.0},
{-0.0, -0.0},
// Test some notable perfect squares
{+0.25, +0.5},
{+1.0, +1.0},
{+4.0, +2.0},
{+9.0, +3.0},
{+0x1.ffffff0000002p1023, +0x1.ffffff8p511}
};
for(int i = 0; i < testCases.length; i++) {
failures += testSqrtCase(testCases[i][0], testCases[i][1]);
}
return failures;
}
private static int testSqrtCase(double input, double expected) {
int failures=0;
failures+=Tests.test("Math.sqrt", input, Math::sqrt, expected);
failures+=Tests.test("StrictMath.sqrt", input, StrictMath::sqrt, expected);
return failures;
}
}
|
