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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
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23 package test.java.lang.Math;
24 
25 import java.util.function.*;
26 
27 import static org.testng.Assert.assertEquals;
28 import static org.testng.Assert.assertThrows;
29 import org.testng.annotations.Test;
30 /*
31  * @test
32  * @bug 8241374
33  * @summary Test abs and absExact for Math and StrictMath
34  */
35 public class AbsTests {
36 
37     @Test
testInRangeIntAbs()38     public void testInRangeIntAbs() {
39         int[][] testCases  = {
40             // Argument to abs, expected result
41             {+0, 0},
42             {+1, 1},
43             {-1, 1},
44             {-2, 2},
45             {+2, 2},
46             {-Integer.MAX_VALUE, Integer.MAX_VALUE},
47             {+Integer.MAX_VALUE, Integer.MAX_VALUE}
48         };
49 
50         for(var testCase : testCases) {
51             testIntAbs(Math::abs,      testCase[0], testCase[1]);
52             testIntAbs(Math::absExact, testCase[0], testCase[1]);
53         }
54     }
55 
56     @Test
testIntMinValue()57     public void testIntMinValue() {
58         // Strange but true
59         testIntAbs(Math::abs, Integer.MIN_VALUE, Integer.MIN_VALUE);
60 
61         // Test exceptional behavior for absExact
62         assertThrows(ArithmeticException.class, () -> Math.absExact(Integer.MIN_VALUE));
63     }
64 
testIntAbs(IntUnaryOperator absFunc, int argument, int expected)65     private static void testIntAbs(IntUnaryOperator absFunc,
66                            int argument, int expected) {
67         int result = absFunc.applyAsInt(argument);
68         assertEquals(result, expected,
69                      String.format("Unexpected int abs result %d for argument %d%n",
70                                    result, argument));
71     }
72 
73     // --------------------------------------------------------------------
74 
75     @Test
testInRangeLongAbs()76     public void testInRangeLongAbs() {
77         long[][] testCases  = {
78             // Argument to abs, expected result
79             {+0L, 0L},
80             {+1L, 1L},
81             {-1L, 1L},
82             {-2L, 2L},
83             {+2L, 2L},
84             {-Integer.MAX_VALUE, Integer.MAX_VALUE},
85             {+Integer.MAX_VALUE, Integer.MAX_VALUE},
86             { Integer.MIN_VALUE, -((long)Integer.MIN_VALUE)},
87             {-Long.MAX_VALUE, Long.MAX_VALUE},
88         };
89 
90         for(var testCase : testCases) {
91             testLongAbs(Math::abs,      testCase[0], testCase[1]);
92             testLongAbs(Math::absExact, testCase[0], testCase[1]);
93         }
94     }
95 
96     @Test
testLongMinValue()97     public void testLongMinValue() {
98         // Strange but true
99         testLongAbs(Math::abs, Long.MIN_VALUE, Long.MIN_VALUE);
100 
101         // Test exceptional behavior for absExact
102         assertThrows(ArithmeticException.class, () -> Math.absExact(Long.MIN_VALUE));
103     }
104 
testLongAbs(LongUnaryOperator absFunc, long argument, long expected)105     private static void testLongAbs(LongUnaryOperator absFunc,
106                            long argument, long expected) {
107         long result = absFunc.applyAsLong(argument);
108         assertEquals(result, expected,
109                      String.format("Unexpected long abs result %d for argument %d%n",
110                                    result, argument));
111     }
112 }
113