Android example source code file (StrictMathTest.java)
The StrictMathTest.java Android example source code
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* 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 android.core;
import junit.framework.TestCase;
import android.test.suitebuilder.annotation.SmallTest;
import android.test.suitebuilder.annotation.MediumTest;
public class StrictMathTest extends TestCase {
private final double HYP = StrictMath.sqrt(2.0);
private final double OPP = 1.0;
private final double ADJ = 1.0;
/* Required to make previous preprocessor flags work - do not remove */
int unused = 0;
/**
* @tests java.lang.StrictMath#abs(double)
*/
@SmallTest
public void testAbsD() {
// Test for method double java.lang.StrictMath.abs(double)
assertTrue("Incorrect double abs value",
(StrictMath.abs(-1908.8976) == 1908.8976));
assertTrue("Incorrect double abs value",
(StrictMath.abs(1908.8976) == 1908.8976));
}
/**
* @tests java.lang.StrictMath#abs(float)
*/
@SmallTest
public void testAbsF() {
// Test for method float java.lang.StrictMath.abs(float)
assertTrue("Incorrect float abs value",
(StrictMath.abs(-1908.8976f) == 1908.8976f));
assertTrue("Incorrect float abs value",
(StrictMath.abs(1908.8976f) == 1908.8976f));
}
/**
* @tests java.lang.StrictMath#abs(int)
*/
@SmallTest
public void testAbsI() {
// Test for method int java.lang.StrictMath.abs(int)
assertTrue("Incorrect int abs value",
(StrictMath.abs(-1908897) == 1908897));
assertTrue("Incorrect int abs value",
(StrictMath.abs(1908897) == 1908897));
}
/**
* @tests java.lang.StrictMath#abs(long)
*/
@SmallTest
public void testAbsJ() {
// Test for method long java.lang.StrictMath.abs(long)
assertTrue("Incorrect long abs value", (StrictMath
.abs(-19088976000089L) == 19088976000089L));
assertTrue("Incorrect long abs value",
(StrictMath.abs(19088976000089L) == 19088976000089L));
}
/**
* @tests java.lang.StrictMath#acos(double)
*/
@SmallTest
public void testAcosD() {
// Test for method double java.lang.StrictMath.acos(double)
assertTrue("Returned incorrect arc cosine", StrictMath.cos(StrictMath
.acos(ADJ / HYP)) == ADJ / HYP);
}
/**
* @tests java.lang.StrictMath#asin(double)
*/
@SmallTest
public void testAsinD() {
// Test for method double java.lang.StrictMath.asin(double)
assertTrue("Returned incorrect arc sine", StrictMath.sin(StrictMath
.asin(OPP / HYP)) == OPP / HYP);
}
/**
* @tests java.lang.StrictMath#atan(double)
*/
@SmallTest
public void testAtanD() {
// Test for method double java.lang.StrictMath.atan(double)
double answer = StrictMath.tan(StrictMath.atan(1.0));
assertTrue("Returned incorrect arc tangent: " + answer, answer <= 1.0
&& answer >= 9.9999999999999983E-1);
}
/**
* @tests java.lang.StrictMath#atan2(double,double)
*/
@SmallTest
public void testAtan2DD() {
// Test for method double java.lang.StrictMath.atan2(double, double)
double answer = StrictMath.atan(StrictMath.tan(1.0));
assertTrue("Returned incorrect arc tangent: " + answer, answer <= 1.0
&& answer >= 9.9999999999999983E-1);
}
/**
* @tests java.lang.StrictMath#cbrt(double)
*/
@SuppressWarnings("boxing")
@SmallTest
public void testCbrtD() {
// Test for special situations
assertTrue("Should return Double.NaN", Double.isNaN(StrictMath
.cbrt(Double.NaN)));
assertEquals("Should return Double.POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath
.cbrt(Double.POSITIVE_INFINITY));
assertEquals("Should return Double.NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, StrictMath
.cbrt(Double.NEGATIVE_INFINITY));
assertEquals(Double.doubleToLongBits(0.0), Double
.doubleToLongBits(StrictMath.cbrt(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(StrictMath.cbrt(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(StrictMath.cbrt(-0.0)));
assertEquals("Should return 3.0", 3.0, StrictMath.cbrt(27.0));
assertEquals("Should return 23.111993172558684", 23.111993172558684,
StrictMath.cbrt(12345.6));
assertEquals("Should return 5.643803094122362E102",
5.643803094122362E102, StrictMath.cbrt(Double.MAX_VALUE));
assertEquals("Should return 0.01", 0.01, StrictMath.cbrt(0.000001));
assertEquals("Should return -3.0", -3.0, StrictMath.cbrt(-27.0));
assertEquals("Should return -23.111993172558684", -23.111993172558684,
StrictMath.cbrt(-12345.6));
assertEquals("Should return 1.7031839360032603E-108",
1.7031839360032603E-108, StrictMath.cbrt(Double.MIN_VALUE));
assertEquals("Should return -0.01", -0.01, StrictMath.cbrt(-0.000001));
try {
StrictMath.cbrt((Double) null);
fail("Should throw NullPointerException");
} catch (NullPointerException e) {
//expected
}
}
/**
* @tests java.lang.StrictMath#ceil(double)
*/
@SmallTest
public void testCeilD() {
// Test for method double java.lang.StrictMath.ceil(double)
assertEquals("Incorrect ceiling for double",
79, StrictMath.ceil(78.89), 0.0);
assertEquals("Incorrect ceiling for double",
-78, StrictMath.ceil(-78.89), 0.0);
}
/**
* @tests java.lang.StrictMath#cos(double)
*/
@SmallTest
public void testCosD() {
// Test for method double java.lang.StrictMath.cos(double)
assertTrue("Returned incorrect cosine", StrictMath.cos(StrictMath
.acos(ADJ / HYP)) == ADJ / HYP);
}
/**
* @tests java.lang.StrictMath#cosh(double)
*/
@SuppressWarnings("boxing")
@SmallTest
public void testCosh_D() {
// Test for special situations
assertTrue("Should return NaN", Double.isNaN(StrictMath
.cosh(Double.NaN)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath
.cosh(Double.POSITIVE_INFINITY));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath
.cosh(Double.NEGATIVE_INFINITY));
assertEquals("Should return 1.0", 1.0, StrictMath.cosh(+0.0));
assertEquals("Should return 1.0", 1.0, StrictMath.cosh(-0.0));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.cosh(1234.56));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.cosh(-1234.56));
assertEquals("Should return 1.0000000000005", 1.0000000000005,
StrictMath.cosh(0.000001));
assertEquals("Should return 1.0000000000005", 1.0000000000005,
StrictMath.cosh(-0.000001));
assertEquals("Should return 5.212214351945598", 5.212214351945598,
StrictMath.cosh(2.33482));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.cosh(Double.MAX_VALUE));
assertEquals("Should return 1.0", 1.0, StrictMath
.cosh(Double.MIN_VALUE));
}
/**
* @tests java.lang.StrictMath#exp(double)
*/
@SmallTest
public void testExpD() {
// Test for method double java.lang.StrictMath.exp(double)
assertTrue("Incorrect answer returned for simple power", StrictMath
.abs(StrictMath.exp(4D) - StrictMath.E * StrictMath.E
* StrictMath.E * StrictMath.E) < 0.1D);
assertTrue("Incorrect answer returned for larger power", StrictMath
.log(StrictMath.abs(StrictMath.exp(5.5D)) - 5.5D) < 10.0D);
}
/**
* @tests java.lang.StrictMath#expm1(double)
*/
@SuppressWarnings("boxing")
@SmallTest
public void testExpm1D() {
//Test for special cases
assertTrue("Should return NaN", Double.isNaN(StrictMath.expm1(Double.NaN)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.expm1(Double.POSITIVE_INFINITY));
assertEquals("Should return -1.0", -1.0, StrictMath
.expm1(Double.NEGATIVE_INFINITY));
assertEquals(Double.doubleToLongBits(0.0), Double
.doubleToLongBits(StrictMath.expm1(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(StrictMath.expm1(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(StrictMath.expm1(-0.0)));
assertEquals("Should return -9.999950000166666E-6",
-9.999950000166666E-6, StrictMath.expm1(-0.00001));
assertEquals("Should return 1.0145103074469635E60",
1.0145103074469635E60, StrictMath.expm1(138.16951162));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath
.expm1(123456789123456789123456789.4521584223));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.expm1(Double.MAX_VALUE));
assertEquals("Should return MIN_VALUE", Double.MIN_VALUE, StrictMath
.expm1(Double.MIN_VALUE));
}
/**
* @tests java.lang.StrictMath#floor(double)
*/
@SmallTest
public void testFloorD() {
// Test for method double java.lang.StrictMath.floor(double)
assertEquals("Incorrect floor for double",
78, StrictMath.floor(78.89), 0.0);
assertEquals("Incorrect floor for double",
-79, StrictMath.floor(-78.89), 0.0);
}
/**
* @tests java.lang.StrictMath#hypot(double,double)
*/
@SuppressWarnings("boxing")
@SmallTest
public void testHypotDD() {
// Test for special cases
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.hypot(Double.POSITIVE_INFINITY,
1.0));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.hypot(Double.NEGATIVE_INFINITY,
123.324));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.hypot(-758.2587,
Double.POSITIVE_INFINITY));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.hypot(5687.21,
Double.NEGATIVE_INFINITY));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.hypot(Double.POSITIVE_INFINITY,
Double.NEGATIVE_INFINITY));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.hypot(Double.NEGATIVE_INFINITY,
Double.POSITIVE_INFINITY));
assertTrue("Should return NaN", Double.isNaN(StrictMath.hypot(Double.NaN,
2342301.89843)));
assertTrue("Should return NaN", Double.isNaN(StrictMath.hypot(-345.2680,
Double.NaN)));
assertEquals("Should return 2396424.905416697", 2396424.905416697, StrictMath
.hypot(12322.12, -2396393.2258));
assertEquals("Should return 138.16958070558556", 138.16958070558556,
StrictMath.hypot(-138.16951162, 0.13817035864));
assertEquals("Should return 1.7976931348623157E308",
1.7976931348623157E308, StrictMath.hypot(Double.MAX_VALUE, 211370.35));
assertEquals("Should return 5413.7185", 5413.7185, StrictMath.hypot(
-5413.7185, Double.MIN_VALUE));
}
/**
* @tests java.lang.StrictMath#IEEEremainder(double,double)
*/
@SmallTest
public void testIEEEremainderDD() {
// Test for method double java.lang.StrictMath.IEEEremainder(double,
// double)
assertEquals("Incorrect remainder returned", 0.0, StrictMath.IEEEremainder(
1.0, 1.0), 0.0);
assertTrue(
"Incorrect remainder returned",
StrictMath.IEEEremainder(1.32, 89.765) >= 1.4705063220631647E-2
|| StrictMath.IEEEremainder(1.32, 89.765) >= 1.4705063220631649E-2);
}
/**
* @tests java.lang.StrictMath#log(double)
*/
@SmallTest
public void testLogD() {
// Test for method double java.lang.StrictMath.log(double)
for (double d = 10; d >= -10; d -= 0.5) {
double answer = StrictMath.log(StrictMath.exp(d));
assertTrue("Answer does not equal expected answer for d = " + d
+ " answer = " + answer,
StrictMath.abs(answer - d) <= StrictMath
.abs(d * 0.00000001));
}
}
/**
* @tests java.lang.StrictMath#log10(double)
*/
@SuppressWarnings("boxing")
@SmallTest
public void testLog10D() {
// Test for special cases
assertTrue("Should return NaN", Double.isNaN(StrictMath
.log10(Double.NaN)));
assertTrue("Should return NaN", Double.isNaN(StrictMath
.log10(-2541.05745687234187532)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath
.log10(Double.POSITIVE_INFINITY));
assertEquals("Should return NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, StrictMath.log10(0.0));
assertEquals("Should return NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, StrictMath.log10(+0.0));
assertEquals("Should return NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, StrictMath.log10(-0.0));
assertEquals("Should return 14.0", 14.0, StrictMath.log10(StrictMath
.pow(10, 14)));
assertEquals("Should return 3.7389561269540406", 3.7389561269540406,
StrictMath.log10(5482.2158));
assertEquals("Should return 14.661551142893833", 14.661551142893833,
StrictMath.log10(458723662312872.125782332587));
assertEquals("Should return -0.9083828622192334", -0.9083828622192334,
StrictMath.log10(0.12348583358871));
assertEquals("Should return 308.25471555991675", 308.25471555991675,
StrictMath.log10(Double.MAX_VALUE));
assertEquals("Should return -323.3062153431158", -323.3062153431158,
StrictMath.log10(Double.MIN_VALUE));
}
/**
* @tests java.lang.StrictMath#log1p(double)
*/
@SuppressWarnings("boxing")
@SmallTest
public void testLog1pD() {
// Test for special cases
assertTrue("Should return NaN", Double.isNaN(StrictMath
.log1p(Double.NaN)));
assertTrue("Should return NaN", Double.isNaN(StrictMath
.log1p(-32.0482175)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath
.log1p(Double.POSITIVE_INFINITY));
assertEquals(Double.doubleToLongBits(0.0), Double
.doubleToLongBits(StrictMath.log1p(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(StrictMath.log1p(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(StrictMath.log1p(-0.0)));
assertEquals("Should return -0.2941782295312541", -0.2941782295312541,
StrictMath.log1p(-0.254856327));
assertEquals("Should return 7.368050685564151", 7.368050685564151,
StrictMath.log1p(1583.542));
assertEquals("Should return 0.4633708685409921", 0.4633708685409921,
StrictMath.log1p(0.5894227));
assertEquals("Should return 709.782712893384", 709.782712893384,
StrictMath.log1p(Double.MAX_VALUE));
assertEquals("Should return Double.MIN_VALUE", Double.MIN_VALUE,
StrictMath.log1p(Double.MIN_VALUE));
}
/**
* @tests java.lang.StrictMath#max(double,double)
*/
@SmallTest
public void testMaxDD() {
// Test for method double java.lang.StrictMath.max(double, double)
assertEquals("Incorrect double max value", 1908897.6000089, StrictMath.max(
-1908897.6000089, 1908897.6000089), 0D);
assertEquals("Incorrect double max value", 1908897.6000089, StrictMath.max(2.0,
1908897.6000089), 0D);
assertEquals("Incorrect double max value", -2.0, StrictMath.max(-2.0,
-1908897.6000089), 0D);
}
/**
* @tests java.lang.StrictMath#max(float,float)
*/
@SmallTest
public void testMaxFF() {
// Test for method float java.lang.StrictMath.max(float, float)
assertTrue("Incorrect float max value", StrictMath.max(-1908897.600f,
1908897.600f) == 1908897.600f);
assertTrue("Incorrect float max value", StrictMath.max(2.0f,
1908897.600f) == 1908897.600f);
assertTrue("Incorrect float max value", StrictMath.max(-2.0f,
-1908897.600f) == -2.0f);
}
/**
* @tests java.lang.StrictMath#max(int,int)
*/
@SmallTest
public void testMaxII() {
// Test for method int java.lang.StrictMath.max(int, int)
assertEquals("Incorrect int max value", 19088976, StrictMath.max(-19088976,
19088976));
assertEquals("Incorrect int max value",
19088976, StrictMath.max(20, 19088976));
assertEquals("Incorrect int max value",
-20, StrictMath.max(-20, -19088976));
}
/**
* @tests java.lang.StrictMath#max(long,long)
*/
@SmallTest
public void testMaxJJ() {
// Test for method long java.lang.StrictMath.max(long, long)
assertEquals("Incorrect long max value", 19088976000089L, StrictMath.max(-19088976000089L,
19088976000089L));
assertEquals("Incorrect long max value", 19088976000089L, StrictMath.max(20,
19088976000089L));
assertEquals("Incorrect long max value", -20, StrictMath.max(-20,
-19088976000089L));
}
/**
* @tests java.lang.StrictMath#min(double,double)
*/
@SmallTest
public void testMinDD() {
// Test for method double java.lang.StrictMath.min(double, double)
assertEquals("Incorrect double min value", -1908897.6000089, StrictMath.min(
-1908897.6000089, 1908897.6000089), 0D);
assertEquals("Incorrect double min value", 2.0, StrictMath.min(2.0,
1908897.6000089), 0D);
assertEquals("Incorrect double min value", -1908897.6000089, StrictMath.min(-2.0,
-1908897.6000089), 0D);
}
/**
* @tests java.lang.StrictMath#min(float,float)
*/
@SmallTest
public void testMinFF() {
// Test for method float java.lang.StrictMath.min(float, float)
assertTrue("Incorrect float min value", StrictMath.min(-1908897.600f,
1908897.600f) == -1908897.600f);
assertTrue("Incorrect float min value", StrictMath.min(2.0f,
1908897.600f) == 2.0f);
assertTrue("Incorrect float min value", StrictMath.min(-2.0f,
-1908897.600f) == -1908897.600f);
}
/**
* @tests java.lang.StrictMath#min(int,int)
*/
@SmallTest
public void testMinII() {
// Test for method int java.lang.StrictMath.min(int, int)
assertEquals("Incorrect int min value", -19088976, StrictMath.min(-19088976,
19088976));
assertEquals("Incorrect int min value",
20, StrictMath.min(20, 19088976));
assertEquals("Incorrect int min value",
-19088976, StrictMath.min(-20, -19088976));
}
/**
* @tests java.lang.StrictMath#min(long,long)
*/
@SmallTest
public void testMinJJ() {
// Test for method long java.lang.StrictMath.min(long, long)
assertEquals("Incorrect long min value", -19088976000089L, StrictMath.min(-19088976000089L,
19088976000089L));
assertEquals("Incorrect long min value", 20, StrictMath.min(20,
19088976000089L));
assertEquals("Incorrect long min value", -19088976000089L, StrictMath.min(-20,
-19088976000089L));
}
/**
* @tests java.lang.StrictMath#pow(double,double)
*/
@SmallTest
public void testPowDD() {
// Test for method double java.lang.StrictMath.pow(double, double)
assertTrue("pow returned incorrect value",
(long) StrictMath.pow(2, 8) == 256l);
assertTrue("pow returned incorrect value",
StrictMath.pow(2, -8) == 0.00390625d);
}
/**
* @tests java.lang.StrictMath#rint(double)
*/
@SmallTest
public void testRintD() {
// Test for method double java.lang.StrictMath.rint(double)
assertEquals("Failed to round properly - up to odd",
3.0, StrictMath.rint(2.9), 0D);
assertTrue("Failed to round properly - NaN", Double.isNaN(StrictMath
.rint(Double.NaN)));
assertEquals("Failed to round properly down to even", 2.0, StrictMath
.rint(2.1), 0D);
assertTrue("Failed to round properly " + 2.5 + " to even", StrictMath
.rint(2.5) == 2.0);
}
/**
* @tests java.lang.StrictMath#round(double)
*/
@SmallTest
public void testRoundD() {
// Test for method long java.lang.StrictMath.round(double)
assertEquals("Incorrect rounding of a float",
-91, StrictMath.round(-90.89d));
}
/**
* @tests java.lang.StrictMath#round(float)
*/
@SmallTest
public void testRoundF() {
// Test for method int java.lang.StrictMath.round(float)
assertEquals("Incorrect rounding of a float",
-91, StrictMath.round(-90.89f));
}
/**
* @tests java.lang.StrictMath#signum(double)
*/
@SmallTest
public void testSignumD() {
assertTrue(Double.isNaN(StrictMath.signum(Double.NaN)));
assertEquals(Double.doubleToLongBits(0.0), Double
.doubleToLongBits(StrictMath.signum(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(StrictMath.signum(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(StrictMath.signum(-0.0)));
assertEquals(1.0, StrictMath.signum(253681.2187962), 0D);
assertEquals(-1.0, StrictMath.signum(-125874693.56), 0D);
assertEquals(1.0, StrictMath.signum(1.2587E-308), 0D);
assertEquals(-1.0, StrictMath.signum(-1.2587E-308), 0D);
assertEquals(1.0, StrictMath.signum(Double.MAX_VALUE), 0D);
assertEquals(1.0, StrictMath.signum(Double.MIN_VALUE), 0D);
assertEquals(-1.0, StrictMath.signum(-Double.MAX_VALUE), 0D);
assertEquals(-1.0, StrictMath.signum(-Double.MIN_VALUE), 0D);
assertEquals(1.0, StrictMath.signum(Double.POSITIVE_INFINITY), 0D);
assertEquals(-1.0, StrictMath.signum(Double.NEGATIVE_INFINITY), 0D);
}
/**
* @tests java.lang.StrictMath#signum(float)
*/
@SmallTest
public void testSignumF() {
assertTrue(Float.isNaN(StrictMath.signum(Float.NaN)));
assertEquals(Float.floatToIntBits(0.0f), Float
.floatToIntBits(StrictMath.signum(0.0f)));
assertEquals(Float.floatToIntBits(+0.0f), Float
.floatToIntBits(StrictMath.signum(+0.0f)));
assertEquals(Float.floatToIntBits(-0.0f), Float
.floatToIntBits(StrictMath.signum(-0.0f)));
assertEquals(1.0f, StrictMath.signum(253681.2187962f), 0f);
assertEquals(-1.0f, StrictMath.signum(-125874693.56f), 0f);
assertEquals(1.0f, StrictMath.signum(1.2587E-11f), 0f);
assertEquals(-1.0f, StrictMath.signum(-1.2587E-11f), 0f);
assertEquals(1.0f, StrictMath.signum(Float.MAX_VALUE), 0f);
assertEquals(1.0f, StrictMath.signum(Float.MIN_VALUE), 0f);
assertEquals(-1.0f, StrictMath.signum(-Float.MAX_VALUE), 0f);
assertEquals(-1.0f, StrictMath.signum(-Float.MIN_VALUE), 0f);
assertEquals(1.0f, StrictMath.signum(Float.POSITIVE_INFINITY), 0f);
assertEquals(-1.0f, StrictMath.signum(Float.NEGATIVE_INFINITY), 0f);
}
/**
* @tests java.lang.StrictMath#sin(double)
*/
@SmallTest
public void testSinD() {
// Test for method double java.lang.StrictMath.sin(double)
assertTrue("Returned incorrect sine", StrictMath.sin(StrictMath
.asin(OPP / HYP)) == OPP / HYP);
}
/**
* @tests java.lang.StrictMath#sinh(double)
*/
@SmallTest
public void testSinhD() {
// Test for special situations
assertTrue(Double.isNaN(StrictMath.sinh(Double.NaN)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath
.sinh(Double.POSITIVE_INFINITY), 0D);
assertEquals("Should return NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, StrictMath
.sinh(Double.NEGATIVE_INFINITY), 0D);
assertEquals(Double.doubleToLongBits(0.0), Double
.doubleToLongBits(StrictMath.sinh(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(StrictMath.sinh(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(StrictMath.sinh(-0.0)));
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.sinh(1234.56), 0D);
assertEquals("Should return NEGATIVE_INFINITY",
Double.NEGATIVE_INFINITY, StrictMath.sinh(-1234.56), 0D);
assertEquals("Should return 1.0000000000001666E-6",
1.0000000000001666E-6, StrictMath.sinh(0.000001), 0D);
assertEquals("Should return -1.0000000000001666E-6",
-1.0000000000001666E-6, StrictMath.sinh(-0.000001), 0D);
assertEquals("Should return 5.115386441963859", 5.115386441963859,
StrictMath.sinh(2.33482), 0D);
assertEquals("Should return POSITIVE_INFINITY",
Double.POSITIVE_INFINITY, StrictMath.sinh(Double.MAX_VALUE), 0D);
assertEquals("Should return 4.9E-324", 4.9E-324, StrictMath
.sinh(Double.MIN_VALUE), 0D);
}
/**
* @tests java.lang.StrictMath#sqrt(double)
*/
@SmallTest
public void testSqrtD() {
// Test for method double java.lang.StrictMath.sqrt(double)
assertEquals("Incorrect root returned1",
2, StrictMath.sqrt(StrictMath.pow(StrictMath.sqrt(2), 4)), 0.0);
assertEquals("Incorrect root returned2", 7, StrictMath.sqrt(49), 0.0);
}
/**
* @tests java.lang.StrictMath#tan(double)
*/
@SmallTest
public void testTanD() {
// Test for method double java.lang.StrictMath.tan(double)
assertTrue(
"Returned incorrect tangent: ",
StrictMath.tan(StrictMath.atan(1.0)) <= 1.0
|| StrictMath.tan(StrictMath.atan(1.0)) >= 9.9999999999999983E-1);
}
/**
* @tests java.lang.StrictMath#tanh(double)
*/
@SmallTest
public void testTanhD() {
// Test for special situations
assertTrue(Double.isNaN(StrictMath.tanh(Double.NaN)));
assertEquals("Should return +1.0", +1.0, StrictMath
.tanh(Double.POSITIVE_INFINITY), 0D);
assertEquals("Should return -1.0", -1.0, StrictMath
.tanh(Double.NEGATIVE_INFINITY), 0D);
assertEquals(Double.doubleToLongBits(0.0), Double
.doubleToLongBits(StrictMath.tanh(0.0)));
assertEquals(Double.doubleToLongBits(+0.0), Double
.doubleToLongBits(StrictMath.tanh(+0.0)));
assertEquals(Double.doubleToLongBits(-0.0), Double
.doubleToLongBits(StrictMath.tanh(-0.0)));
assertEquals("Should return 1.0", 1.0, StrictMath.tanh(1234.56), 0D);
assertEquals("Should return -1.0", -1.0, StrictMath.tanh(-1234.56), 0D);
assertEquals("Should return 9.999999999996666E-7",
9.999999999996666E-7, StrictMath.tanh(0.000001), 0D);
assertEquals("Should return 0.981422884124941", 0.981422884124941,
StrictMath.tanh(2.33482), 0D);
assertEquals("Should return 1.0", 1.0, StrictMath
.tanh(Double.MAX_VALUE), 0D);
assertEquals("Should return 4.9E-324", 4.9E-324, StrictMath
.tanh(Double.MIN_VALUE), 0D);
}
/**
* @tests java.lang.StrictMath#random()
*/
@MediumTest
public void testRandom() {
// There isn't a place for these tests so just stick them here
assertEquals("Wrong value E",
4613303445314885481L, Double.doubleToLongBits(StrictMath.E));
assertEquals("Wrong value PI",
4614256656552045848L, Double.doubleToLongBits(StrictMath.PI));
for (int i = 500; i >= 0; i--) {
double d = StrictMath.random();
assertTrue("Generated number is out of range: " + d, d >= 0.0
&& d < 1.0);
}
}
/**
* @tests java.lang.StrictMath#toRadians(double)
*/
@MediumTest
public void testToRadiansD() {
for (double d = 500; d >= 0; d -= 1.0) {
double converted = StrictMath.toDegrees(StrictMath.toRadians(d));
assertTrue("Converted number not equal to original. d = " + d,
converted >= d * 0.99999999 && converted <= d * 1.00000001);
}
}
/**
* @tests java.lang.StrictMath#toDegrees(double)
*/
@MediumTest
public void testToDegreesD() {
for (double d = 500; d >= 0; d -= 1.0) {
double converted = StrictMath.toRadians(StrictMath.toDegrees(d));
assertTrue("Converted number not equal to original. d = " + d,
converted >= d * 0.99999999 && converted <= d * 1.00000001);
}
}
/**
* @tests java.lang.StrictMath#ulp(double)
*/
@SuppressWarnings("boxing")
@SmallTest
public void testUlp_D() {
// Test for special cases
assertTrue("Should return NaN", Double
.isNaN(StrictMath.ulp(Double.NaN)));
assertEquals("Returned incorrect value", Double.POSITIVE_INFINITY,
StrictMath.ulp(Double.POSITIVE_INFINITY), 0D);
assertEquals("Returned incorrect value", Double.POSITIVE_INFINITY,
StrictMath.ulp(Double.NEGATIVE_INFINITY), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath
.ulp(0.0), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath
.ulp(+0.0), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath
.ulp(-0.0), 0D);
assertEquals("Returned incorrect value", StrictMath.pow(2, 971),
StrictMath.ulp(Double.MAX_VALUE), 0D);
assertEquals("Returned incorrect value", StrictMath.pow(2, 971),
StrictMath.ulp(-Double.MAX_VALUE), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath
.ulp(Double.MIN_VALUE), 0D);
assertEquals("Returned incorrect value", Double.MIN_VALUE, StrictMath
.ulp(-Double.MIN_VALUE), 0D);
assertEquals("Returned incorrect value", 2.220446049250313E-16,
StrictMath.ulp(1.0), 0D);
assertEquals("Returned incorrect value", 2.220446049250313E-16,
StrictMath.ulp(-1.0), 0D);
assertEquals("Returned incorrect value", 2.2737367544323206E-13,
StrictMath.ulp(1153.0), 0D);
}
/**
* @tests java.lang.StrictMath#ulp(float)
*/
@SuppressWarnings("boxing")
@SmallTest
public void testUlpF() {
// Test for special cases
assertTrue("Should return NaN", Float.isNaN(StrictMath.ulp(Float.NaN)));
assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY,
StrictMath.ulp(Float.POSITIVE_INFINITY), 0f);
assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY,
StrictMath.ulp(Float.NEGATIVE_INFINITY), 0f);
assertEquals("Returned incorrect value", Float.MIN_VALUE, StrictMath
.ulp(0.0f), 0f);
assertEquals("Returned incorrect value", Float.MIN_VALUE, StrictMath
.ulp(+0.0f), 0f);
assertEquals("Returned incorrect value", Float.MIN_VALUE, StrictMath
.ulp(-0.0f), 0f);
assertEquals("Returned incorrect value", 2.028241E31f, StrictMath
.ulp(Float.MAX_VALUE), 0f);
assertEquals("Returned incorrect value", 2.028241E31f, StrictMath
.ulp(-Float.MAX_VALUE), 0f);
assertEquals("Returned incorrect value", 1.4E-45f, StrictMath
.ulp(Float.MIN_VALUE), 0f);
assertEquals("Returned incorrect value", 1.4E-45f, StrictMath
.ulp(-Float.MIN_VALUE), 0f);
assertEquals("Returned incorrect value", 1.1920929E-7f, StrictMath
.ulp(1.0f), 0f);
assertEquals("Returned incorrect value", 1.1920929E-7f, StrictMath
.ulp(-1.0f), 0f);
assertEquals("Returned incorrect value", 1.2207031E-4f, StrictMath
.ulp(1153.0f), 0f);
assertEquals("Returned incorrect value", 5.6E-45f, Math
.ulp(9.403954E-38f), 0f);
}
}
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