| /* |
| * 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 org.apache.harmony.luni.tests.java.lang; |
| |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.COPYSIGN_DD_CASES; |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.COPYSIGN_FF_CASES; |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.GETEXPONENT_D_CASES; |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.GETEXPONENT_D_RESULTS; |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.GETEXPONENT_F_CASES; |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.GETEXPONENT_F_RESULTS; |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.NEXTAFTER_DD_START_CASES; |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.NEXTAFTER_DD_FD_DIRECTION_CASES; |
| import static org.apache.harmony.luni.tests.java.lang.MathTest.NEXTAFTER_FD_START_CASES; |
| |
| public class StrictMathTest extends junit.framework.TestCase { |
| |
| double HYP = StrictMath.sqrt(2.0); |
| |
| double OPP = 1.0; |
| |
| double ADJ = 1.0; |
| |
| /* Required to make previous preprocessor flags work - do not remove */ |
| int unused = 0; |
| |
| /** |
| * @tests java.lang.StrictMath#abs(double) |
| */ |
| public void test_absD() { |
| // 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) |
| */ |
| public void test_absF() { |
| // 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) |
| */ |
| public void test_absI() { |
| // 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) |
| */ |
| public void test_absJ() { |
| // 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) |
| */ |
| public void test_acosD() { |
| // 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) |
| */ |
| public void test_asinD() { |
| // 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) |
| */ |
| public void test_atanD() { |
| // 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) |
| */ |
| public void test_atan2DD() { |
| // 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") |
| public void test_cbrt_D() { |
| // 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) |
| */ |
| public void test_ceilD() { |
| // 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 {@link java.lang.StrictMath#copySign(double, double)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_copySign_DD() { |
| for (int i = 0; i < COPYSIGN_DD_CASES.length; i++) { |
| final double magnitude = COPYSIGN_DD_CASES[i]; |
| final long absMagnitudeBits = Double.doubleToLongBits(StrictMath |
| .abs(magnitude)); |
| final long negMagnitudeBits = Double.doubleToLongBits(-StrictMath |
| .abs(magnitude)); |
| |
| // cases for NaN |
| assertEquals("If the sign is NaN, the result should be positive.", |
| absMagnitudeBits, Double.doubleToLongBits(StrictMath |
| .copySign(magnitude, Double.NaN))); |
| assertTrue("The result should be NaN.", Double.isNaN(StrictMath |
| .copySign(Double.NaN, magnitude))); |
| |
| for (int j = 0; j < COPYSIGN_DD_CASES.length; j++) { |
| final double sign = COPYSIGN_DD_CASES[j]; |
| final long resultBits = Double.doubleToLongBits(StrictMath |
| .copySign(magnitude, sign)); |
| |
| if (sign > 0 || Double.valueOf(+0.0).equals(sign) |
| || Double.valueOf(0.0).equals(sign)) { |
| assertEquals( |
| "If the sign is positive, the result should be positive.", |
| absMagnitudeBits, resultBits); |
| } |
| if (sign < 0 || Double.valueOf(-0.0).equals(sign)) { |
| assertEquals( |
| "If the sign is negative, the result should be negative.", |
| negMagnitudeBits, resultBits); |
| } |
| } |
| } |
| |
| assertTrue("The result should be NaN.", Double.isNaN(StrictMath |
| .copySign(Double.NaN, Double.NaN))); |
| |
| try { |
| StrictMath.copySign((Double) null, 2.3); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.copySign(2.3, (Double) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.copySign((Double) null, (Double) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| |
| double d = Double.longBitsToDouble(0xfff8000000000000L); |
| assertEquals(1.0, StrictMath.copySign(1.0, d), 0d); |
| } |
| |
| /** |
| * @tests {@link java.lang.StrictMath#copySign(float, float)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_copySign_FF() { |
| for (int i = 0; i < COPYSIGN_FF_CASES.length; i++) { |
| final float magnitude = COPYSIGN_FF_CASES[i]; |
| final int absMagnitudeBits = Float.floatToIntBits(StrictMath |
| .abs(magnitude)); |
| final int negMagnitudeBits = Float.floatToIntBits(-StrictMath |
| .abs(magnitude)); |
| |
| // cases for NaN |
| assertEquals("If the sign is NaN, the result should be positive.", |
| absMagnitudeBits, Float.floatToIntBits(StrictMath.copySign( |
| magnitude, Float.NaN))); |
| assertTrue("The result should be NaN.", Float.isNaN(StrictMath |
| .copySign(Float.NaN, magnitude))); |
| |
| for (int j = 0; j < COPYSIGN_FF_CASES.length; j++) { |
| final float sign = COPYSIGN_FF_CASES[j]; |
| final int resultBits = Float.floatToIntBits(StrictMath |
| .copySign(magnitude, sign)); |
| if (sign > 0 || Float.valueOf(+0.0f).equals(sign) |
| || Float.valueOf(0.0f).equals(sign)) { |
| assertEquals( |
| "If the sign is positive, the result should be positive.", |
| absMagnitudeBits, resultBits); |
| } |
| if (sign < 0 || Float.valueOf(-0.0f).equals(sign)) { |
| assertEquals( |
| "If the sign is negative, the result should be negative.", |
| negMagnitudeBits, resultBits); |
| } |
| } |
| } |
| |
| assertTrue("The result should be NaN.", Float.isNaN(StrictMath |
| .copySign(Float.NaN, Float.NaN))); |
| |
| try { |
| StrictMath.copySign((Float) null, 2.3f); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.copySign(2.3f, (Float) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.copySign((Float) null, (Float) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| |
| float f = Float.intBitsToFloat(0xffc00000); |
| assertEquals(1.0f, StrictMath.copySign(1.0f, f), 0f); |
| } |
| |
| /** |
| * @tests java.lang.StrictMath#cos(double) |
| */ |
| public void test_cosD() { |
| // 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") |
| public void test_cosh_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) |
| */ |
| public void test_expD() { |
| // 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") |
| public void test_expm1_D() { |
| //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) |
| */ |
| public void test_floorD() { |
| // 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 {@link java.lang.StrictMath#getExponent(double)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_getExponent_D() { |
| for (int i = 0; i < GETEXPONENT_D_CASES.length; i++) { |
| final double number = GETEXPONENT_D_CASES[i]; |
| final int result = GETEXPONENT_D_RESULTS[i]; |
| assertEquals("Wrong result of getExponent(double).", result, |
| StrictMath.getExponent(number)); |
| } |
| |
| try { |
| StrictMath.getExponent((Double) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| } |
| |
| /** |
| * @tests {@link java.lang.StrictMath#getExponent(float)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_getExponent_F() { |
| for (int i = 0; i < GETEXPONENT_F_CASES.length; i++) { |
| final float number = GETEXPONENT_F_CASES[i]; |
| final int result = GETEXPONENT_F_RESULTS[i]; |
| assertEquals("Wrong result of getExponent(float).", result, |
| StrictMath.getExponent(number)); |
| } |
| try { |
| StrictMath.getExponent((Float) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| } |
| |
| /** |
| * @tests java.lang.StrictMath#hypot(double, double) |
| */ |
| @SuppressWarnings("boxing") |
| public void test_hypot_DD() { |
| // 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) |
| */ |
| public void test_IEEEremainderDD() { |
| // 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) |
| */ |
| public void test_logD() { |
| // 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") |
| public void test_log10_D() { |
| // 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") |
| public void test_log1p_D() { |
| // 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) |
| */ |
| public void test_maxDD() { |
| // 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) |
| */ |
| public void test_maxFF() { |
| // 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) |
| */ |
| public void test_maxII() { |
| // 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) |
| */ |
| public void test_maxJJ() { |
| // 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) |
| */ |
| public void test_minDD() { |
| // 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) |
| */ |
| public void test_minFF() { |
| // 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) |
| */ |
| public void test_minII() { |
| // 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) |
| */ |
| public void test_minJJ() { |
| // 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 {@link java.lang.StrictMath#nextAfter(double, double)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_nextAfter_DD() { |
| // test for most cases without exception |
| for (int i = 0; i < NEXTAFTER_DD_START_CASES.length; i++) { |
| final double start = NEXTAFTER_DD_START_CASES[i][0]; |
| final long nextUpBits = Double |
| .doubleToLongBits(NEXTAFTER_DD_START_CASES[i][1]); |
| final long nextDownBits = Double |
| .doubleToLongBits(NEXTAFTER_DD_START_CASES[i][2]); |
| |
| for (int j = 0; j < NEXTAFTER_DD_FD_DIRECTION_CASES.length; j++) { |
| final double direction = NEXTAFTER_DD_FD_DIRECTION_CASES[j]; |
| final long resultBits = Double.doubleToLongBits(StrictMath |
| .nextAfter(start, direction)); |
| final long directionBits = Double.doubleToLongBits(direction); |
| if (direction > start) { |
| assertEquals("Result should be next up-number.", |
| nextUpBits, resultBits); |
| } else if (direction < start) { |
| assertEquals("Result should be next down-number.", |
| nextDownBits, resultBits); |
| } else { |
| assertEquals("Result should be direction.", directionBits, |
| resultBits); |
| } |
| } |
| } |
| |
| // test for cases with NaN |
| for (int i = 0; i < NEXTAFTER_DD_START_CASES.length; i++) { |
| assertTrue("The result should be NaN.", Double.isNaN(StrictMath |
| .nextAfter(NEXTAFTER_DD_START_CASES[i][0], Double.NaN))); |
| } |
| for (int i = 0; i < NEXTAFTER_DD_FD_DIRECTION_CASES.length; i++) { |
| assertTrue("The result should be NaN.", Double.isNaN(StrictMath |
| .nextAfter(Double.NaN, NEXTAFTER_DD_FD_DIRECTION_CASES[i]))); |
| } |
| assertTrue("The result should be NaN.", Double.isNaN(StrictMath |
| .nextAfter(Double.NaN, Double.NaN))); |
| |
| // test for exception |
| try { |
| StrictMath.nextAfter((Double) null, 2.3); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.nextAfter(2.3, (Double) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.nextAfter((Double) null, (Double) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| } |
| |
| /** |
| * @tests {@link java.lang.StrictMath#nextAfter(float, double)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_nextAfter_FD() { |
| // test for most cases without exception |
| for (int i = 0; i < NEXTAFTER_FD_START_CASES.length; i++) { |
| final float start = NEXTAFTER_FD_START_CASES[i][0]; |
| final int nextUpBits = Float |
| .floatToIntBits(NEXTAFTER_FD_START_CASES[i][1]); |
| final int nextDownBits = Float |
| .floatToIntBits(NEXTAFTER_FD_START_CASES[i][2]); |
| |
| for (int j = 0; j < NEXTAFTER_DD_FD_DIRECTION_CASES.length; j++) { |
| final double direction = NEXTAFTER_DD_FD_DIRECTION_CASES[j]; |
| final int resultBits = Float.floatToIntBits(StrictMath |
| .nextAfter(start, direction)); |
| if (direction > start) { |
| assertEquals("Result should be next up-number.", |
| nextUpBits, resultBits); |
| } else if (direction < start) { |
| assertEquals("Result should be next down-number.", |
| nextDownBits, resultBits); |
| } else { |
| final int equivalentBits = Float.floatToIntBits(new Float( |
| direction)); |
| assertEquals( |
| "Result should be a number equivalent to direction.", |
| equivalentBits, resultBits); |
| } |
| } |
| } |
| |
| // test for cases with NaN |
| for (int i = 0; i < NEXTAFTER_FD_START_CASES.length; i++) { |
| assertTrue("The result should be NaN.", Float.isNaN(StrictMath |
| .nextAfter(NEXTAFTER_FD_START_CASES[i][0], Float.NaN))); |
| } |
| for (int i = 0; i < NEXTAFTER_DD_FD_DIRECTION_CASES.length; i++) { |
| assertTrue("The result should be NaN.", Float.isNaN(StrictMath |
| .nextAfter(Float.NaN, NEXTAFTER_DD_FD_DIRECTION_CASES[i]))); |
| } |
| assertTrue("The result should be NaN.", Float.isNaN(StrictMath |
| .nextAfter(Float.NaN, Float.NaN))); |
| |
| // test for exception |
| try { |
| StrictMath.nextAfter((Float) null, 2.3); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.nextAfter(2.3, (Float) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.nextAfter((Float) null, (Float) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| } |
| |
| /** |
| * @tests {@link java.lang.StrictMath#nextUp(double)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_nextUp_D() { |
| // This method is semantically equivalent to nextAfter(d, |
| // Double.POSITIVE_INFINITY), |
| // so we use the data of test_nextAfter_DD |
| for (int i = 0; i < NEXTAFTER_DD_START_CASES.length; i++) { |
| final double start = NEXTAFTER_DD_START_CASES[i][0]; |
| final long nextUpBits = Double |
| .doubleToLongBits(NEXTAFTER_DD_START_CASES[i][1]); |
| final long resultBits = Double.doubleToLongBits(StrictMath |
| .nextUp(start)); |
| assertEquals("Result should be next up-number.", nextUpBits, |
| resultBits); |
| } |
| |
| // test for cases with NaN |
| assertTrue("The result should be NaN.", Double.isNaN(StrictMath |
| .nextUp(Double.NaN))); |
| |
| // test for exception |
| try { |
| StrictMath.nextUp((Double) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| } |
| |
| /** |
| * @tests {@link java.lang.StrictMath#nextUp(float)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_nextUp_F() { |
| // This method is semantically equivalent to nextAfter(f, |
| // Float.POSITIVE_INFINITY), |
| // so we use the data of test_nextAfter_FD |
| for (int i = 0; i < NEXTAFTER_FD_START_CASES.length; i++) { |
| final float start = NEXTAFTER_FD_START_CASES[i][0]; |
| final int nextUpBits = Float |
| .floatToIntBits(NEXTAFTER_FD_START_CASES[i][1]); |
| final int resultBits = Float.floatToIntBits(StrictMath |
| .nextUp(start)); |
| assertEquals("Result should be next up-number.", nextUpBits, |
| resultBits); |
| } |
| |
| // test for cases with NaN |
| assertTrue("The result should be NaN.", Float.isNaN(StrictMath |
| .nextUp(Float.NaN))); |
| |
| // test for exception |
| try { |
| StrictMath.nextUp((Float) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| } |
| |
| /** |
| * @tests java.lang.StrictMath#pow(double, double) |
| */ |
| public void test_powDD() { |
| // 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) |
| */ |
| public void test_rintD() { |
| // 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) |
| */ |
| public void test_roundD() { |
| // 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) |
| */ |
| public void test_roundF() { |
| // Test for method int java.lang.StrictMath.round(float) |
| assertEquals("Incorrect rounding of a float", |
| -91, StrictMath.round(-90.89f)); |
| } |
| |
| /** |
| * @tests {@link java.lang.StrictMath#scalb(double, int)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_scalb_DI() { |
| // result is normal |
| assertEquals(4.1422946304E7, StrictMath.scalb(1.2345, 25)); |
| assertEquals(3.679096698760986E-8, StrictMath.scalb(1.2345, -25)); |
| assertEquals(1.2345, StrictMath.scalb(1.2345, 0)); |
| assertEquals(7868514.304, StrictMath.scalb(0.2345, 25)); |
| |
| double normal = StrictMath.scalb(0.2345, -25); |
| assertEquals(6.98864459991455E-9, normal); |
| // precision kept |
| assertEquals(0.2345, StrictMath.scalb(normal, 25)); |
| |
| assertEquals(0.2345, StrictMath.scalb(0.2345, 0)); |
| assertEquals(-4.1422946304E7, StrictMath.scalb(-1.2345, 25)); |
| assertEquals(-6.98864459991455E-9, StrictMath.scalb(-0.2345, -25)); |
| assertEquals(2.0, StrictMath.scalb(Double.MIN_NORMAL / 2, 1024)); |
| assertEquals(64.0, StrictMath.scalb(Double.MIN_VALUE, 1080)); |
| assertEquals(234, StrictMath.getExponent(StrictMath.scalb(1.0, 234))); |
| assertEquals(3.9999999999999996, StrictMath.scalb(Double.MAX_VALUE, |
| Double.MIN_EXPONENT)); |
| |
| // result is near infinity |
| double halfMax = StrictMath.scalb(1.0, Double.MAX_EXPONENT); |
| assertEquals(8.98846567431158E307, halfMax); |
| assertEquals(Double.MAX_VALUE, halfMax - StrictMath.ulp(halfMax) |
| + halfMax); |
| assertEquals(Double.POSITIVE_INFINITY, halfMax + halfMax); |
| assertEquals(1.7976931348623155E308, StrictMath.scalb(1.0 - StrictMath |
| .ulp(1.0), Double.MAX_EXPONENT + 1)); |
| assertEquals(Double.POSITIVE_INFINITY, StrictMath.scalb( |
| 1.0 - StrictMath.ulp(1.0), Double.MAX_EXPONENT + 2)); |
| |
| halfMax = StrictMath.scalb(-1.0, Double.MAX_EXPONENT); |
| assertEquals(-8.98846567431158E307, halfMax); |
| assertEquals(-Double.MAX_VALUE, halfMax + StrictMath.ulp(halfMax) |
| + halfMax); |
| assertEquals(Double.NEGATIVE_INFINITY, halfMax + halfMax); |
| |
| assertEquals(Double.POSITIVE_INFINITY, StrictMath.scalb(0.345, 1234)); |
| assertEquals(Double.POSITIVE_INFINITY, StrictMath |
| .scalb(44.345E102, 934)); |
| assertEquals(Double.NEGATIVE_INFINITY, StrictMath.scalb(-44.345E102, |
| 934)); |
| |
| assertEquals(Double.POSITIVE_INFINITY, StrictMath.scalb( |
| Double.MIN_NORMAL / 2, 4000)); |
| assertEquals(Double.POSITIVE_INFINITY, StrictMath.scalb( |
| Double.MIN_VALUE, 8000)); |
| assertEquals(Double.POSITIVE_INFINITY, StrictMath.scalb( |
| Double.MAX_VALUE, 1)); |
| assertEquals(Double.POSITIVE_INFINITY, StrictMath.scalb( |
| Double.POSITIVE_INFINITY, 0)); |
| assertEquals(Double.POSITIVE_INFINITY, StrictMath.scalb( |
| Double.POSITIVE_INFINITY, -1)); |
| assertEquals(Double.NEGATIVE_INFINITY, StrictMath.scalb( |
| Double.NEGATIVE_INFINITY, -1)); |
| assertEquals(Double.NEGATIVE_INFINITY, StrictMath.scalb( |
| Double.NEGATIVE_INFINITY, Double.MIN_EXPONENT)); |
| |
| // result is subnormal/zero |
| long posZeroBits = Double.doubleToLongBits(+0.0); |
| long negZeroBits = Double.doubleToLongBits(-0.0); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| +0.0, Integer.MAX_VALUE))); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| +0.0, -123))); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| +0.0, 0))); |
| assertEquals(negZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| -0.0, 123))); |
| assertEquals(negZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| -0.0, Integer.MIN_VALUE))); |
| |
| assertEquals(Double.MIN_VALUE, StrictMath.scalb(1.0, -1074)); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb(1.0, |
| -1075))); |
| assertEquals(negZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| -1.0, -1075))); |
| |
| // precision lost |
| assertEquals(StrictMath.scalb(21.405, -1078), StrictMath.scalb(21.405, |
| -1079)); |
| assertEquals(Double.MIN_VALUE, StrictMath.scalb(21.405, -1079)); |
| assertEquals(-Double.MIN_VALUE, StrictMath.scalb(-21.405, -1079)); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| 21.405, -1080))); |
| assertEquals(negZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| -21.405, -1080))); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| Double.MIN_VALUE, -1))); |
| assertEquals(negZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| -Double.MIN_VALUE, -1))); |
| assertEquals(Double.MIN_VALUE, StrictMath.scalb(Double.MIN_NORMAL, -52)); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| Double.MIN_NORMAL, -53))); |
| assertEquals(negZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| -Double.MIN_NORMAL, -53))); |
| assertEquals(Double.MIN_VALUE, StrictMath |
| .scalb(Double.MAX_VALUE, -2098)); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| Double.MAX_VALUE, -2099))); |
| assertEquals(negZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| -Double.MAX_VALUE, -2099))); |
| assertEquals(Double.MIN_VALUE, StrictMath.scalb(Double.MIN_NORMAL / 3, |
| -51)); |
| assertEquals(posZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| Double.MIN_NORMAL / 3, -52))); |
| assertEquals(negZeroBits, Double.doubleToLongBits(StrictMath.scalb( |
| -Double.MIN_NORMAL / 3, -52))); |
| double subnormal = StrictMath.scalb(Double.MIN_NORMAL / 3, -25); |
| assertEquals(2.2104123E-316, subnormal); |
| // precision lost |
| assertFalse(Double.MIN_NORMAL / 3 == StrictMath.scalb(subnormal, 25)); |
| |
| // NaN |
| assertTrue(Double.isNaN(StrictMath.scalb(Double.NaN, 1))); |
| assertTrue(Double.isNaN(StrictMath.scalb(Double.NaN, 0))); |
| assertTrue(Double.isNaN(StrictMath.scalb(Double.NaN, -120))); |
| |
| assertEquals(1283457024, Double.doubleToLongBits(StrictMath.scalb( |
| Double.MIN_VALUE * 153, 23))); |
| assertEquals(-9223372035571318784L, Double.doubleToLongBits(StrictMath |
| .scalb(-Double.MIN_VALUE * 153, 23))); |
| assertEquals(36908406321184768L, Double.doubleToLongBits(StrictMath |
| .scalb(Double.MIN_VALUE * 153, 52))); |
| assertEquals(-9186463630533591040L, Double.doubleToLongBits(StrictMath |
| .scalb(-Double.MIN_VALUE * 153, 52))); |
| |
| // test for exception |
| try { |
| StrictMath.scalb((Double) null, (Integer) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.scalb(1.0, (Integer) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.scalb((Double) null, 1); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| } |
| |
| /** |
| * @tests {@link java.lang.StrictMath#scalb(float, int)} |
| * @since 1.6 |
| */ |
| @SuppressWarnings("boxing") |
| public void test_scalb_FI() { |
| // result is normal |
| assertEquals(4.1422946304E7f, StrictMath.scalb(1.2345f, 25)); |
| assertEquals(3.679096698760986E-8f, StrictMath.scalb(1.2345f, -25)); |
| assertEquals(1.2345f, StrictMath.scalb(1.2345f, 0)); |
| assertEquals(7868514.304f, StrictMath.scalb(0.2345f, 25)); |
| |
| float normal = StrictMath.scalb(0.2345f, -25); |
| assertEquals(6.98864459991455E-9f, normal); |
| // precision kept |
| assertEquals(0.2345f, StrictMath.scalb(normal, 25)); |
| |
| assertEquals(0.2345f, StrictMath.scalb(0.2345f, 0)); |
| assertEquals(-4.1422946304E7f, StrictMath.scalb(-1.2345f, 25)); |
| assertEquals(-6.98864459991455E-9f, StrictMath.scalb(-0.2345f, -25)); |
| assertEquals(2.0f, StrictMath.scalb(Float.MIN_NORMAL / 2, 128)); |
| assertEquals(64.0f, StrictMath.scalb(Float.MIN_VALUE, 155)); |
| assertEquals(34, StrictMath.getExponent(StrictMath.scalb(1.0f, 34))); |
| assertEquals(3.9999998f, StrictMath.scalb(Float.MAX_VALUE, |
| Float.MIN_EXPONENT)); |
| |
| // result is near infinity |
| float halfMax = StrictMath.scalb(1.0f, Float.MAX_EXPONENT); |
| assertEquals(1.7014118E38f, halfMax); |
| assertEquals(Float.MAX_VALUE, halfMax - StrictMath.ulp(halfMax) |
| + halfMax); |
| assertEquals(Float.POSITIVE_INFINITY, halfMax + halfMax); |
| assertEquals(3.4028233E38f, StrictMath.scalb(1.0f - StrictMath |
| .ulp(1.0f), Float.MAX_EXPONENT + 1)); |
| assertEquals(Float.POSITIVE_INFINITY, StrictMath.scalb( |
| 1.0f - StrictMath.ulp(1.0f), Float.MAX_EXPONENT + 2)); |
| |
| halfMax = StrictMath.scalb(-1.0f, Float.MAX_EXPONENT); |
| assertEquals(-1.7014118E38f, halfMax); |
| assertEquals(-Float.MAX_VALUE, halfMax + StrictMath.ulp(halfMax) |
| + halfMax); |
| assertEquals(Float.NEGATIVE_INFINITY, halfMax + halfMax); |
| |
| assertEquals(Float.POSITIVE_INFINITY, StrictMath.scalb(0.345f, 1234)); |
| assertEquals(Float.POSITIVE_INFINITY, StrictMath.scalb(44.345E10f, 934)); |
| assertEquals(Float.NEGATIVE_INFINITY, StrictMath |
| .scalb(-44.345E10f, 934)); |
| |
| assertEquals(Float.POSITIVE_INFINITY, StrictMath.scalb( |
| Float.MIN_NORMAL / 2, 400)); |
| assertEquals(Float.POSITIVE_INFINITY, StrictMath.scalb(Float.MIN_VALUE, |
| 800)); |
| assertEquals(Float.POSITIVE_INFINITY, StrictMath.scalb(Float.MAX_VALUE, |
| 1)); |
| assertEquals(Float.POSITIVE_INFINITY, StrictMath.scalb( |
| Float.POSITIVE_INFINITY, 0)); |
| assertEquals(Float.POSITIVE_INFINITY, StrictMath.scalb( |
| Float.POSITIVE_INFINITY, -1)); |
| assertEquals(Float.NEGATIVE_INFINITY, StrictMath.scalb( |
| Float.NEGATIVE_INFINITY, -1)); |
| assertEquals(Float.NEGATIVE_INFINITY, StrictMath.scalb( |
| Float.NEGATIVE_INFINITY, Float.MIN_EXPONENT)); |
| |
| // result is subnormal/zero |
| int posZeroBits = Float.floatToIntBits(+0.0f); |
| int negZeroBits = Float.floatToIntBits(-0.0f); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb(+0.0f, |
| Integer.MAX_VALUE))); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb(+0.0f, |
| -123))); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb(+0.0f, |
| 0))); |
| assertEquals(negZeroBits, Float.floatToIntBits(StrictMath.scalb(-0.0f, |
| 123))); |
| assertEquals(negZeroBits, Float.floatToIntBits(StrictMath.scalb(-0.0f, |
| Integer.MIN_VALUE))); |
| |
| assertEquals(Float.MIN_VALUE, StrictMath.scalb(1.0f, -149)); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb(1.0f, |
| -150))); |
| assertEquals(negZeroBits, Float.floatToIntBits(StrictMath.scalb(-1.0f, |
| -150))); |
| |
| // precision lost |
| assertEquals(StrictMath.scalb(21.405f, -154), StrictMath.scalb(21.405f, |
| -153)); |
| assertEquals(Float.MIN_VALUE, StrictMath.scalb(21.405f, -154)); |
| assertEquals(-Float.MIN_VALUE, StrictMath.scalb(-21.405f, -154)); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| 21.405f, -155))); |
| assertEquals(negZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| -21.405f, -155))); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| Float.MIN_VALUE, -1))); |
| assertEquals(negZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| -Float.MIN_VALUE, -1))); |
| assertEquals(Float.MIN_VALUE, StrictMath.scalb(Float.MIN_NORMAL, -23)); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| Float.MIN_NORMAL, -24))); |
| assertEquals(negZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| -Float.MIN_NORMAL, -24))); |
| assertEquals(Float.MIN_VALUE, StrictMath.scalb(Float.MAX_VALUE, -277)); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| Float.MAX_VALUE, -278))); |
| assertEquals(negZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| -Float.MAX_VALUE, -278))); |
| assertEquals(Float.MIN_VALUE, StrictMath.scalb(Float.MIN_NORMAL / 3, |
| -22)); |
| assertEquals(posZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| Float.MIN_NORMAL / 3, -23))); |
| assertEquals(negZeroBits, Float.floatToIntBits(StrictMath.scalb( |
| -Float.MIN_NORMAL / 3, -23))); |
| float subnormal = StrictMath.scalb(Float.MIN_NORMAL / 3, -11); |
| assertEquals(1.913E-42f, subnormal); |
| // precision lost |
| assertFalse(Float.MIN_NORMAL / 3 == StrictMath.scalb(subnormal, 11)); |
| |
| assertEquals(68747264, Float.floatToIntBits(StrictMath.scalb( |
| Float.MIN_VALUE * 153, 23))); |
| assertEquals(-2078736384, Float.floatToIntBits(StrictMath.scalb( |
| -Float.MIN_VALUE * 153, 23))); |
| |
| assertEquals(4896, Float.floatToIntBits(StrictMath.scalb( |
| Float.MIN_VALUE * 153, 5))); |
| assertEquals(-2147478752, Float.floatToIntBits(StrictMath.scalb( |
| -Float.MIN_VALUE * 153, 5))); |
| |
| // NaN |
| assertTrue(Float.isNaN(StrictMath.scalb(Float.NaN, 1))); |
| assertTrue(Float.isNaN(StrictMath.scalb(Float.NaN, 0))); |
| assertTrue(Float.isNaN(StrictMath.scalb(Float.NaN, -120))); |
| |
| // test for exception |
| try { |
| StrictMath.scalb((Float) null, (Integer) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.scalb(1.0f, (Integer) null); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| try { |
| StrictMath.scalb((Float) null, 1); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| // Expected |
| } |
| } |
| |
| /** |
| * @tests java.lang.StrictMath#signum(double) |
| */ |
| public void test_signum_D() { |
| 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) |
| */ |
| public void test_signum_F() { |
| 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) |
| */ |
| public void test_sinD() { |
| // 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) |
| */ |
| public void test_sinh_D() { |
| // 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) |
| */ |
| public void test_sqrtD() { |
| // 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) |
| */ |
| public void test_tanD() { |
| // 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) |
| */ |
| public void test_tanh_D() { |
| // 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() |
| */ |
| public void test_random() { |
| // 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) |
| */ |
| public void test_toRadiansD() { |
| 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) |
| */ |
| public void test_toDegreesD() { |
| 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") |
| public void test_ulp_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") |
| public void test_ulp_f() { |
| // 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); |
| } |
| } |
