/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package libcore.java.lang;
import junit.framework.Assert;
import junit.framework.TestCase;
public class OldAndroidMathTest extends TestCase {
private static final double HYP = Math.sqrt(2.0);
private static final double OPP = 1.0;
private static final double ADJ = 1.0;
/* Required to make previous preprocessor flags work - do not remove */
int unused = 0;
public static void assertEquals(String message, double expected, double actual, double delta) {
if (delta == 0D) {
Assert.assertEquals(message, expected, actual, Math.ulp(expected));
} else {
Assert.assertEquals(message, expected, actual, delta);
}
}
public static void assertEquals(String message, float expected, float actual, float delta) {
if (delta == 0F) {
Assert.assertEquals(message, expected, actual, Math.ulp(expected));
} else {
Assert.assertEquals(message, expected, actual, delta);
}
}
public void testAbsD() {
// Test for method double java.lang.Math.abs(double)
assertTrue("Incorrect double abs value",
(Math.abs(-1908.8976) == 1908.8976));
assertTrue("Incorrect double abs value",
(Math.abs(1908.8976) == 1908.8976));
}
public void testAbsF() {
// Test for method float java.lang.Math.abs(float)
assertTrue("Incorrect float abs value",
(Math.abs(-1908.8976f) == 1908.8976f));
assertTrue("Incorrect float abs value",
(Math.abs(1908.8976f) == 1908.8976f));
}
public void testAbsI() {
// Test for method int java.lang.Math.abs(int)
assertTrue("Incorrect int abs value", (Math.abs(-1908897) == 1908897));
assertTrue("Incorrect int abs value", (Math.abs(1908897) == 1908897));
}
public void testAbsJ() {
// Test for method long java.lang.Math.abs(long)
assertTrue("Incorrect long abs value",
(Math.abs(-19088976000089L) == 19088976000089L));
assertTrue("Incorrect long abs value",
(Math.abs(19088976000089L) == 19088976000089L));
}
public void testAcosD() {
// Test for method double java.lang.Math.acos(double)
double r = Math.cos(Math.acos(ADJ / HYP));
long lr = Double.doubleToLongBits(r);
long t = Double.doubleToLongBits(ADJ / HYP);
assertTrue("Returned incorrect arc cosine", lr == t || (lr + 1) == t
|| (lr - 1) == t);
}
public void testAsinD() {
// Test for method double java.lang.Math.asin(double)
double r = Math.sin(Math.asin(OPP / HYP));
long lr = Double.doubleToLongBits(r);
long t = Double.doubleToLongBits(OPP / HYP);
assertTrue("Returned incorrect arc sine", lr == t || (lr + 1) == t
|| (lr - 1) == t);
}
public void testAtanD() {
// Test for method double java.lang.Math.atan(double)
double answer = Math.tan(Math.atan(1.0));
assertTrue("Returned incorrect arc tangent: " + answer, answer <= 1.0
&& answer >= 9.9999999999999983E-1);
}
public void testAtan2DD() {
// Test for method double java.lang.Math.atan2(double, double)
double answer = Math.atan(Math.tan(1.0));
assertTrue("Returned incorrect arc tangent: " + answer, answer <= 1.0
&& answer >= 9.9999999999999983E-1);
}
public void testCbrtD() {
//Test for special situations
assertTrue("Should return Double.NaN", Double.isNaN(Math
.cbrt(Double.NaN)));
assertEquals("Should return Double.POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math
.cbrt(Double.POSITIVE_INFINITY), 0D);
assertEquals("Should return Double.NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, Math
.cbrt(Double.NEGATIVE_INFINITY), 0D);
assertEquals(Double.doubleToLongBits(0.0), Double.doubleToLongBits(Math
.cbrt(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double.doubleToLongBits(Math
.cbrt(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double.doubleToLongBits(Math
.cbrt(-0.0)));
assertEquals("Should return 3.0", 3.0, Math.cbrt(27.0), 0D);
assertEquals("Should return 23.111993172558684", 23.111993172558684,
Math.cbrt(12345.6), 0D);
assertEquals("Should return 5.643803094122362E102",
5.643803094122362E102, Math.cbrt(Double.MAX_VALUE), 0D);
assertEquals("Should return 0.01", 0.01, Math.cbrt(0.000001), 0D);
assertEquals("Should return -3.0", -3.0, Math.cbrt(-27.0), 0D);
assertEquals("Should return -23.111993172558684", -23.111993172558684,
Math.cbrt(-12345.6), 0D);
assertEquals("Should return 1.7031839360032603E-108",
1.7031839360032603E-108, Math.cbrt(Double.MIN_VALUE), 0D);
assertEquals("Should return -0.01", -0.01, Math.cbrt(-0.000001), 0D);
}
public void testCeilD() {
// Test for method double java.lang.Math.ceil(double)
assertEquals("Incorrect ceiling for double",
79, Math.ceil(78.89), 0);
assertEquals("Incorrect ceiling for double",
-78, Math.ceil(-78.89), 0);
}
public void testCosD() {
// Test for method double java.lang.Math.cos(double)
assertEquals("Incorrect answer", 1.0, Math.cos(0), 0D);
assertEquals("Incorrect answer", 0.5403023058681398, Math.cos(1), 0D);
}
public void testCoshD() {
// Test for special situations
assertTrue(Double.isNaN(Math.cosh(Double.NaN)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.cosh(Double.POSITIVE_INFINITY), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.cosh(Double.NEGATIVE_INFINITY), 0D);
assertEquals("Should return 1.0", 1.0, Math.cosh(+0.0), 0D);
assertEquals("Should return 1.0", 1.0, Math.cosh(-0.0), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.cosh(1234.56), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.cosh(-1234.56), 0D);
assertEquals("Should return 1.0000000000005", 1.0000000000005, Math
.cosh(0.000001), 0D);
assertEquals("Should return 1.0000000000005", 1.0000000000005, Math
.cosh(-0.000001), 0D);
assertEquals("Should return 5.212214351945598", 5.212214351945598, Math
.cosh(2.33482), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.cosh(Double.MAX_VALUE), 0D);
assertEquals("Should return 1.0", 1.0, Math.cosh(Double.MIN_VALUE), 0D);
}
public void testExpD() {
// Test for method double java.lang.Math.exp(double)
assertTrue("Incorrect answer returned for simple power", Math.abs(Math
.exp(4D)
- Math.E * Math.E * Math.E * Math.E) < 0.1D);
assertTrue("Incorrect answer returned for larger power", Math.log(Math
.abs(Math.exp(5.5D)) - 5.5D) < 10.0D);
}
public void testExpm1D() {
// Test for special cases
assertTrue("Should return NaN", Double.isNaN(Math.expm1(Double.NaN)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.expm1(Double.POSITIVE_INFINITY), 0D);
assertEquals("Should return -1.0", -1.0, Math
.expm1(Double.NEGATIVE_INFINITY), 0D);
assertEquals(Double.doubleToLongBits(0.0), Double.doubleToLongBits(Math
.expm1(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(Math.expm1(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(Math.expm1(-0.0)));
assertEquals("Should return -9.999950000166666E-6",
-9.999950000166666E-6, Math.expm1(-0.00001), 0D);
assertEquals("Should return 1.0145103074469635E60",
1.0145103074469635E60, Math.expm1(138.16951162), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math
.expm1(123456789123456789123456789.4521584223), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.expm1(Double.MAX_VALUE), 0D);
assertEquals("Should return MIN_VALUE", Double.MIN_VALUE, Math
.expm1(Double.MIN_VALUE), 0D);
}
public void testFloorD() {
// Test for method double java.lang.Math.floor(double)
assertEquals("Incorrect floor for double",
78, Math.floor(78.89), 0);
assertEquals("Incorrect floor for double",
-79, Math.floor(-78.89), 0);
}
public void testHypotDD() {
// Test for special cases
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.hypot(Double.POSITIVE_INFINITY,
1.0), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.hypot(Double.NEGATIVE_INFINITY,
123.324), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.hypot(-758.2587,
Double.POSITIVE_INFINITY), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.hypot(5687.21,
Double.NEGATIVE_INFINITY), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.hypot(Double.POSITIVE_INFINITY,
Double.NEGATIVE_INFINITY), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.hypot(Double.NEGATIVE_INFINITY,
Double.POSITIVE_INFINITY), 0D);
assertTrue("Should be NaN", Double.isNaN(Math.hypot(Double.NaN,
2342301.89843)));
assertTrue("Should be NaN", Double.isNaN(Math.hypot(-345.2680,
Double.NaN)));
assertEquals("Should return 2396424.905416697", 2396424.905416697, Math
.hypot(12322.12, -2396393.2258), 0D);
assertEquals("Should return 138.16958070558556", 138.16958070558556,
Math.hypot(-138.16951162, 0.13817035864), 0D);
assertEquals("Should return 1.7976931348623157E308",
1.7976931348623157E308, Math.hypot(Double.MAX_VALUE, 211370.35), 0D);
assertEquals("Should return 5413.7185", 5413.7185, Math.hypot(
-5413.7185, Double.MIN_VALUE), 0D);
}
public void testIEEEremainderDD() {
// Test for method double java.lang.Math.IEEEremainder(double, double)
assertEquals("Incorrect remainder returned",
0.0, Math.IEEEremainder(1.0, 1.0), 0D);
assertTrue("Incorrect remainder returned", Math.IEEEremainder(1.32,
89.765) >= 1.4705063220631647E-2
|| Math.IEEEremainder(1.32, 89.765) >= 1.4705063220631649E-2);
}
public void testLogD() {
// Test for method double java.lang.Math.log(double)
for (double d = 10; d >= -10; d -= 0.5) {
double answer = Math.log(Math.exp(d));
assertTrue("Answer does not equal expected answer for d = " + d
+ " answer = " + answer, Math.abs(answer - d) <= Math
.abs(d * 0.00000001));
}
}
@SuppressWarnings("boxing")
public void testLog10D() {
// Test for special cases
assertTrue(Double.isNaN(Math.log10(Double.NaN)));
assertTrue(Double.isNaN(Math.log10(-2541.05745687234187532)));
assertTrue(Double.isNaN(Math.log10(-0.1)));
assertEquals(Double.POSITIVE_INFINITY, Math.log10(Double.POSITIVE_INFINITY));
assertEquals(Double.NEGATIVE_INFINITY, Math.log10(0.0));
assertEquals(Double.NEGATIVE_INFINITY, Math.log10(+0.0));
assertEquals(Double.NEGATIVE_INFINITY, Math.log10(-0.0));
assertEquals(3.0, Math.log10(1000.0));
assertEquals(14.0, Math.log10(Math.pow(10, 14)));
assertEquals(3.7389561269540406, Math.log10(5482.2158));
assertEquals(14.661551142893833, Math.log10(458723662312872.125782332587));
assertEquals(-0.9083828622192334, Math.log10(0.12348583358871));
assertEquals(308.25471555991675, Math.log10(Double.MAX_VALUE));
assertEquals(-323.3062153431158, Math.log10(Double.MIN_VALUE));
}
public void testLog1pD() {
// Test for special cases
assertTrue("Should return NaN", Double.isNaN(Math.log1p(Double.NaN)));
assertTrue("Should return NaN", Double.isNaN(Math.log1p(-32.0482175)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.log1p(Double.POSITIVE_INFINITY), 0D);
assertEquals(Double.doubleToLongBits(0.0), Double.doubleToLongBits(Math
.log1p(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(Math.log1p(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(Math.log1p(-0.0)));
assertEquals("Should return -0.2941782295312541", -0.2941782295312541,
Math.log1p(-0.254856327), 0D);
assertEquals("Should return 7.368050685564151", 7.368050685564151, Math
.log1p(1583.542), 0D);
assertEquals("Should return 0.4633708685409921", 0.4633708685409921,
Math.log1p(0.5894227), 0D);
assertEquals("Should return 709.782712893384", 709.782712893384, Math
.log1p(Double.MAX_VALUE), 0D);
assertEquals("Should return Double.MIN_VALUE", Double.MIN_VALUE, Math
.log1p(Double.MIN_VALUE), 0D);
}
public void testMaxDD() {
// Test for method double java.lang.Math.max(double, double)
assertEquals("Incorrect double max value", 1908897.6000089, Math.max(-1908897.6000089,
1908897.6000089), 0D);
assertEquals("Incorrect double max value",
1908897.6000089, Math.max(2.0, 1908897.6000089), 0D);
assertEquals("Incorrect double max value", -2.0, Math.max(-2.0,
-1908897.6000089), 0D);
}
public void testMaxFF() {
// Test for method float java.lang.Math.max(float, float)
assertTrue("Incorrect float max value", Math.max(-1908897.600f,
1908897.600f) == 1908897.600f);
assertTrue("Incorrect float max value",
Math.max(2.0f, 1908897.600f) == 1908897.600f);
assertTrue("Incorrect float max value",
Math.max(-2.0f, -1908897.600f) == -2.0f);
}
public void testMaxII() {
// Test for method int java.lang.Math.max(int, int)
assertEquals("Incorrect int max value",
19088976, Math.max(-19088976, 19088976));
assertEquals("Incorrect int max value",
19088976, Math.max(20, 19088976));
assertEquals("Incorrect int max value", -20, Math.max(-20, -19088976));
}
public void testMaxJJ() {
// Test for method long java.lang.Math.max(long, long)
assertEquals("Incorrect long max value", 19088976000089L, Math.max(-19088976000089L,
19088976000089L));
assertEquals("Incorrect long max value",
19088976000089L, Math.max(20, 19088976000089L));
assertEquals("Incorrect long max value",
-20, Math.max(-20, -19088976000089L));
}
public void testMinDD() {
// Test for method double java.lang.Math.min(double, double)
assertEquals("Incorrect double min value", -1908897.6000089, Math.min(-1908897.6000089,
1908897.6000089), 0D);
assertEquals("Incorrect double min value",
2.0, Math.min(2.0, 1908897.6000089), 0D);
assertEquals("Incorrect double min value", -1908897.6000089, Math.min(-2.0,
-1908897.6000089), 0D);
}
public void testMinFF() {
// Test for method float java.lang.Math.min(float, float)
assertTrue("Incorrect float min value", Math.min(-1908897.600f,
1908897.600f) == -1908897.600f);
assertTrue("Incorrect float min value",
Math.min(2.0f, 1908897.600f) == 2.0f);
assertTrue("Incorrect float min value",
Math.min(-2.0f, -1908897.600f) == -1908897.600f);
}
public void testMinII() {
// Test for method int java.lang.Math.min(int, int)
assertEquals("Incorrect int min value",
-19088976, Math.min(-19088976, 19088976));
assertEquals("Incorrect int min value", 20, Math.min(20, 19088976));
assertEquals("Incorrect int min value",
-19088976, Math.min(-20, -19088976));
}
public void testMinJJ() {
// Test for method long java.lang.Math.min(long, long)
assertEquals("Incorrect long min value", -19088976000089L, Math.min(-19088976000089L,
19088976000089L));
assertEquals("Incorrect long min value",
20, Math.min(20, 19088976000089L));
assertEquals("Incorrect long min value",
-19088976000089L, Math.min(-20, -19088976000089L));
}
public void testPowDD() {
// Test for method double java.lang.Math.pow(double, double)
assertTrue("pow returned incorrect value",
(long) Math.pow(2, 8) == 256l);
assertTrue("pow returned incorrect value",
Math.pow(2, -8) == 0.00390625d);
assertEquals("Incorrect root returned1",
2, Math.sqrt(Math.pow(Math.sqrt(2), 4)), 0);
}
public void testRintD() {
// Test for method double java.lang.Math.rint(double)
assertEquals("Failed to round properly - up to odd",
3.0, Math.rint(2.9), 0D);
assertTrue("Failed to round properly - NaN", Double.isNaN(Math
.rint(Double.NaN)));
assertEquals("Failed to round properly down to even",
2.0, Math.rint(2.1), 0D);
assertTrue("Failed to round properly " + 2.5 + " to even", Math
.rint(2.5) == 2.0);
}
public void testRoundD() {
// Test for method long java.lang.Math.round(double)
assertEquals("Incorrect rounding of a float", -91, Math.round(-90.89d));
}
public void testRoundF() {
// Test for method int java.lang.Math.round(float)
assertEquals("Incorrect rounding of a float", -91, Math.round(-90.89f));
}
public void testSignumD() {
assertTrue(Double.isNaN(Math.signum(Double.NaN)));
assertTrue(Double.isNaN(Math.signum(Double.NaN)));
assertEquals(Double.doubleToLongBits(0.0), Double.doubleToLongBits(Math
.signum(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(Math.signum(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(Math.signum(-0.0)));
assertEquals(1.0, Math.signum(253681.2187962), 0D);
assertEquals(-1.0, Math.signum(-125874693.56), 0D);
assertEquals(1.0, Math.signum(1.2587E-308), 0D);
assertEquals(-1.0, Math.signum(-1.2587E-308), 0D);
assertEquals(1.0, Math.signum(Double.MAX_VALUE), 0D);
assertEquals(1.0, Math.signum(Double.MIN_VALUE), 0D);
assertEquals(-1.0, Math.signum(-Double.MAX_VALUE), 0D);
assertEquals(-1.0, Math.signum(-Double.MIN_VALUE), 0D);
assertEquals(1.0, Math.signum(Double.POSITIVE_INFINITY), 0D);
assertEquals(-1.0, Math.signum(Double.NEGATIVE_INFINITY), 0D);
}
public void testSignumF() {
assertTrue(Float.isNaN(Math.signum(Float.NaN)));
assertEquals(Float.floatToIntBits(0.0f), Float
.floatToIntBits(Math.signum(0.0f)));
assertEquals(Float.floatToIntBits(+0.0f), Float
.floatToIntBits(Math.signum(+0.0f)));
assertEquals(Float.floatToIntBits(-0.0f), Float
.floatToIntBits(Math.signum(-0.0f)));
assertEquals(1.0f, Math.signum(253681.2187962f), 0f);
assertEquals(-1.0f, Math.signum(-125874693.56f), 0f);
assertEquals(1.0f, Math.signum(1.2587E-11f), 0f);
assertEquals(-1.0f, Math.signum(-1.2587E-11f), 0f);
assertEquals(1.0f, Math.signum(Float.MAX_VALUE), 0f);
assertEquals(1.0f, Math.signum(Float.MIN_VALUE), 0f);
assertEquals(-1.0f, Math.signum(-Float.MAX_VALUE), 0f);
assertEquals(-1.0f, Math.signum(-Float.MIN_VALUE), 0f);
assertEquals(1.0f, Math.signum(Float.POSITIVE_INFINITY), 0f);
assertEquals(-1.0f, Math.signum(Float.NEGATIVE_INFINITY), 0f);
}
public void testSinD() {
// Test for method double java.lang.Math.sin(double)
assertEquals("Incorrect answer", 0.0, Math.sin(0), 0D);
assertEquals("Incorrect answer", 0.8414709848078965, Math.sin(1), 0D);
}
public void testSinhD() {
// Test for special situations
assertTrue("Should return NaN", Double.isNaN(Math.sinh(Double.NaN)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.sinh(Double.POSITIVE_INFINITY), 0D);
assertEquals("Should return NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, Math.sinh(Double.NEGATIVE_INFINITY), 0D);
assertEquals(Double.doubleToLongBits(0.0), Double.doubleToLongBits(Math
.sinh(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(Math.sinh(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(Math.sinh(-0.0)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.sinh(1234.56), 0D);
assertEquals("Should return NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, Math.sinh(-1234.56), 0D);
assertEquals("Should return 1.0000000000001666E-6",
1.0000000000001666E-6, Math.sinh(0.000001), 0D);
assertEquals("Should return -1.0000000000001666E-6",
-1.0000000000001666E-6, Math.sinh(-0.000001), 0D);
assertEquals("Should return 5.115386441963859", 5.115386441963859, Math
.sinh(2.33482), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, Math.sinh(Double.MAX_VALUE), 0D);
assertEquals("Should return 4.9E-324", 4.9E-324, Math
.sinh(Double.MIN_VALUE), 0D);
}
public void testSqrtD() {
// Test for method double java.lang.Math.sqrt(double)
assertEquals("Incorrect root returned2", 7, Math.sqrt(49), 0);
}
public void testTanD() {
// Test for method double java.lang.Math.tan(double)
assertEquals("Incorrect answer", 0.0, Math.tan(0), 0D);
assertEquals("Incorrect answer", 1.5574077246549023, Math.tan(1), 0D);
}
public void testTanhD() {
// Test for special situations
assertTrue("Should return NaN", Double.isNaN(Math.tanh(Double.NaN)));
assertEquals("Should return +1.0", +1.0, Math
.tanh(Double.POSITIVE_INFINITY), 0D);
assertEquals("Should return -1.0", -1.0, Math
.tanh(Double.NEGATIVE_INFINITY), 0D);
assertEquals(Double.doubleToLongBits(0.0), Double.doubleToLongBits(Math
.tanh(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(Math.tanh(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(Math.tanh(-0.0)));
assertEquals("Should return 1.0", 1.0, Math.tanh(1234.56), 0D);
assertEquals("Should return -1.0", -1.0, Math.tanh(-1234.56), 0D);
assertEquals("Should return 9.999999999996666E-7",
9.999999999996666E-7, Math.tanh(0.000001), 0D);
assertEquals("Should return 0.981422884124941", 0.981422884124941, Math
.tanh(2.33482), 0D);
assertEquals("Should return 1.0", 1.0, Math.tanh(Double.MAX_VALUE), 0D);
assertEquals("Should return 4.9E-324", 4.9E-324, Math
.tanh(Double.MIN_VALUE), 0D);
}
public void testRandom() {
// There isn't a place for these tests so just stick them here
assertEquals("Wrong value E",
4613303445314885481L, Double.doubleToLongBits(Math.E));
assertEquals("Wrong value PI",
4614256656552045848L, Double.doubleToLongBits(Math.PI));
for (int i = 500; i >= 0; i--) {
double d = Math.random();
assertTrue("Generated number is out of range: " + d, d >= 0.0
&& d < 1.0);
}
}
public void testToRadiansD() {
for (double d = 500; d >= 0; d -= 1.0) {
double converted = Math.toDegrees(Math.toRadians(d));
assertTrue("Converted number not equal to original. d = " + d,
converted >= d * 0.99999999 && converted <= d * 1.00000001);
}
}
public void testToDegreesD() {
for (double d = 500; d >= 0; d -= 1.0) {
double converted = Math.toRadians(Math.toDegrees(d));
assertTrue("Converted number not equal to original. d = " + d,
converted >= d * 0.99999999 && converted <= d * 1.00000001);
}
}
@SuppressWarnings("boxing")
public void testUlpD() {
// Test for special cases
assertTrue("Should return NaN", Double.isNaN(Math.ulp(Double.NaN)));
assertEquals("Returned incorrect value", Double.POSITIVE_INFINITY, Math
.ulp(Double.POSITIVE_INFINITY), 0D);
assertEquals("Returned incorrect value", Double.POSITIVE_INFINITY, Math
.ulp(Double.NEGATIVE_INFINITY), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, Math
.ulp(0.0), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, Math
.ulp(+0.0), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, Math
.ulp(-0.0), 0D);
assertEquals("Returned incorrect value", Math.pow(2, 971), Math
.ulp(Double.MAX_VALUE), 0D);
assertEquals("Returned incorrect value", Math.pow(2, 971), Math
.ulp(-Double.MAX_VALUE), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, Math
.ulp(Double.MIN_VALUE), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, Math
.ulp(-Double.MIN_VALUE), 0D);
assertEquals("Returned incorrect value", 2.220446049250313E-16, Math
.ulp(1.0), 0D);
assertEquals("Returned incorrect value", 2.220446049250313E-16, Math
.ulp(-1.0), 0D);
assertEquals("Returned incorrect value", 2.2737367544323206E-13, Math
.ulp(1153.0), 0D);
}
@SuppressWarnings("boxing")
public void testUlpf() {
// Test for special cases
assertTrue("Should return NaN", Float.isNaN(Math.ulp(Float.NaN)));
assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, Math
.ulp(Float.POSITIVE_INFINITY), 0f);
assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, Math
.ulp(Float.NEGATIVE_INFINITY), 0f);
assertEquals("Returned incorrect value", Float.MIN_VALUE, Math
.ulp(0.0f), 0f);
assertEquals("Returned incorrect value", Float.MIN_VALUE, Math
.ulp(+0.0f), 0f);
assertEquals("Returned incorrect value", Float.MIN_VALUE, Math
.ulp(-0.0f), 0f);
assertEquals("Returned incorrect value", 2.028241E31f, Math
.ulp(Float.MAX_VALUE), 0f);
assertEquals("Returned incorrect value", 2.028241E31f, Math
.ulp(-Float.MAX_VALUE), 0f);
assertEquals("Returned incorrect value", 1.4E-45f, Math
.ulp(Float.MIN_VALUE), 0f);
assertEquals("Returned incorrect value", 1.4E-45f, Math
.ulp(-Float.MIN_VALUE), 0f);
assertEquals("Returned incorrect value", 1.1920929E-7f, Math.ulp(1.0f),
0f);
assertEquals("Returned incorrect value", 1.1920929E-7f,
Math.ulp(-1.0f), 0f);
assertEquals("Returned incorrect value", 1.2207031E-4f, Math
.ulp(1153.0f), 0f);
assertEquals("Returned incorrect value", 5.6E-45f, Math
.ulp(9.403954E-38f), 0f);
}
}