/* 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.tests.java.lang;
import junit.framework.TestCase;
public class FloatTest extends TestCase {
private static final int rawBitsFor3_4eN38To38[] = { 0x1394470, 0x2e7958c, 0x490bd77, 0x634ecd5,
0x7e2280b, 0x98d5907, 0xb30af48, 0xcdcdb1a, 0xe8a08f0, 0x102c8b2d, 0x11d7adf8,
0x1386ccbb, 0x15287fe9, 0x16d29fe4, 0x1883a3ee, 0x1a248cea, 0x1bcdb025, 0x1d808e17,
0x1f20b19d, 0x20c8de04, 0x227b1585, 0x241ced73, 0x25c428d0, 0x27753303, 0x29193fe2,
0x2abf8fdb, 0x2c6f73d1, 0x2e15a863, 0x2fbb127c, 0x3169d71a, 0x33122671, 0x34b6b00d,
0x36645c10, 0x380eb98a, 0x39b267ec, 0x3b5f01e8, 0x3d0b6131, 0x3eae397d, 0x4059c7dc,
0x42081cea, 0x43aa2424, 0x4554ad2d, 0x4704ec3c, 0x48a6274b, 0x4a4fb11e, 0x4c01ceb3,
0x4da2425f, 0x4f4ad2f7, 0x50fd87b5, 0x529e74d1, 0x54461205, 0x55f79687, 0x579abe14,
0x59416d99, 0x5af1c900, 0x5c971da0, 0x5e3ce508, 0x5fec1e4a, 0x619392ee, 0x633877a9,
0x64e69594, 0x66901d7c, 0x683424dc, 0x69e12e12, 0x6b8cbccb, 0x6d2febfe, 0x6edbe6fe,
0x7089705f, 0x722bcc76, 0x73d6bf94, 0x758637bc, 0x7727c5ac, 0x78d1b717, 0x7a83126e,
0x7c23d70a, 0x7dcccccc, 0x7f7fffff };
private static final String expectedStringFor3_4eN38To38[] = { "3.4028235E-38", "3.4028235E-37",
"3.4028233E-36", "3.4028234E-35", "3.4028236E-34", "3.4028236E-33",
"3.4028234E-32", "3.4028234E-31", "3.4028233E-30", "3.4028236E-29",
"3.4028235E-28", "3.4028235E-27", "3.4028233E-26", "3.4028235E-25",
"3.4028233E-24", "3.4028235E-23", "3.4028236E-22", "3.4028235E-21",
"3.4028236E-20", "3.4028236E-19", "3.4028236E-18", "3.4028235E-17",
"3.4028236E-16", "3.4028234E-15", "3.4028234E-14", "3.4028235E-13",
"3.4028234E-12", "3.4028235E-11", "3.4028236E-10", "3.4028234E-9", "3.4028236E-8",
"3.4028236E-7", "3.4028235E-6", "3.4028235E-5", "3.4028233E-4", "0.0034028236",
"0.034028236", "0.34028235", "3.4028234", "34.028236", "340.28235", "3402.8235",
"34028.234", "340282.34", "3402823.5", "3.4028236E7", "3.40282336E8",
"3.40282342E9", "3.40282348E10", "3.40282343E11", "3.40282337E12", "3.40282353E13",
"3.4028234E14", "3.4028234E15", "3.40282356E16", "3.40282356E17", "3.40282356E18",
"3.4028236E19", "3.4028235E20", "3.4028233E21", "3.4028235E22", "3.4028233E23",
"3.4028236E24", "3.4028234E25", "3.4028233E26", "3.4028234E27", "3.4028235E28",
"3.4028236E29", "3.4028233E30", "3.4028235E31", "3.4028233E32", "3.4028236E33",
"3.4028236E34", "3.4028234E35", "3.4028236E36", "3.4028235E37", "3.4028235E38" };
private static final int rawBitsFor1_17eN38To38[] = { 0x80800000, 0x82200000, 0x83c80000,
0x857a0000, 0x871c4000, 0x88c35000, 0x8a742400, 0x8c189680, 0x8dbebc20, 0x8f6e6b28,
0x911502f9, 0x92ba43b7, 0x9468d4a5, 0x961184e7, 0x97b5e621, 0x99635fa9, 0x9b0e1bca,
0x9cb1a2bc, 0x9e5e0b6b, 0xa00ac723, 0xa1ad78ec, 0xa358d727, 0xa5078678, 0xa6a96816,
0xa853c21c, 0xaa045951, 0xaba56fa6, 0xad4ecb8f, 0xaf013f39, 0xb0a18f08, 0xb249f2ca,
0xb3fc6f7c, 0xb59dc5ae, 0xb7453719, 0xb8f684df, 0xba9a130c, 0xbc4097ce, 0xbdf0bdc2,
0xbf967699, 0xc13c1440, 0xc2eb1950, 0xc492efd2, 0xc637abc6, 0xc7e596b8, 0xc98f7e33,
0xcb335dc0, 0xcce0352f, 0xce8c213e, 0xd02f298d, 0xd1daf3f0, 0xd388d876, 0xd52b0e94,
0xd6d5d239, 0xd885a363, 0xda270c3c, 0xdbd0cf4b, 0xdd82818f, 0xdf2321f3, 0xe0cbea70,
0xe27ee50b, 0xe41f4f27, 0xe5c722f1, 0xe778ebad, 0xe91b934c, 0xeac2781f, 0xec731627,
0xee17edd8, 0xefbde94f, 0xf16d63a2, 0xf3145e45, 0xf4b975d7, 0xf667d34c, 0xf810e410,
0xf9b51d14, 0xfb626459, 0xfd0d7eb7, 0xfeb0de65 };
private static final String expectedStringFor1_17eN38To38[] = { "-1.17549435E-38",
"-1.1754944E-37", "-1.17549435E-36", "-1.17549435E-35", "-1.1754944E-34",
"-1.17549435E-33", "-1.17549435E-32", "-1.1754944E-31", "-1.17549435E-30",
"-1.17549435E-29", "-1.1754944E-28", "-1.1754943E-27", "-1.17549435E-26",
"-1.1754943E-25", "-1.1754944E-24", "-1.1754943E-23", "-1.1754944E-22",
"-1.1754943E-21", "-1.1754943E-20", "-1.1754943E-19", "-1.1754944E-18",
"-1.1754944E-17", "-1.1754943E-16", "-1.1754943E-15", "-1.1754944E-14",
"-1.1754943E-13", "-1.1754944E-12", "-1.1754943E-11", "-1.1754943E-10",
"-1.1754944E-9", "-1.1754944E-8", "-1.1754943E-7", "-1.1754944E-6",
"-1.1754943E-5", "-1.1754943E-4", "-0.0011754944", "-0.011754943", "-0.117549434",
"-1.1754943", "-11.754944", "-117.54944", "-1175.4944", "-11754.943", "-117549.44",
"-1175494.4", "-1.1754944E7", "-1.17549432E8", "-1.1754944E9", "-1.17549435E10",
"-1.17549433E11", "-1.17549433E12", "-1.17549438E13", "-1.17549438E14",
"-1.1754943E15", "-1.17549432E16", "-1.17549432E17", "-1.17549434E18",
"-1.1754944E19", "-1.1754944E20", "-1.1754943E21", "-1.1754943E22",
"-1.1754944E23", "-1.17549434E24", "-1.1754943E25", "-1.1754943E26",
"-1.17549434E27", "-1.1754943E28", "-1.1754944E29", "-1.1754943E30",
"-1.1754943E31", "-1.1754944E32", "-1.1754943E33", "-1.1754944E34",
"-1.1754944E35", "-1.1754944E36", "-1.1754943E37", "-1.1754943E38" };
private void doTestCompareRawBits(String originalFloatString, int expectedRawBits,
String expectedString) {
int rawBits;
float result = Float.parseFloat(originalFloatString);
rawBits = Float.floatToIntBits(result);
assertEquals("Original float(" + originalFloatString + ") Converted float(" + result
+ ") Expecting:" + Integer.toHexString(expectedRawBits) + " Got: "
+ Integer.toHexString(rawBits), expectedRawBits, rawBits);
}
/**
* java.lang.Float#Float(float)
*/
public void test_ConstructorF() {
// Test for method java.lang.Float(float)
Float f = new Float(900.89f);
assertTrue("Created incorrect float", f.floatValue() == 900.89f);
}
/**
* java.lang.Float#Float(java.lang.String)
*/
public void test_ConstructorLjava_lang_String() {
// Test for method java.lang.Float(java.lang.String)
Float f = new Float("900.89");
assertTrue("Created incorrect Float", f.floatValue() == 900.89f);
}
/**
* java.lang.Float#byteValue()
*/
public void test_byteValue() {
// Test for method byte java.lang.Float.byteValue()
Float f = new Float(0.46874f);
Float f2 = new Float(90.8f);
assertTrue("Returned incorrect byte value", f.byteValue() == 0 && f2.byteValue() == 90);
}
/**
* java.lang.Float#compareTo(java.lang.Float)
* java.lang.Float#compare(float, float)
*/
public void test_compare() {
float[] values = new float[] { Float.NEGATIVE_INFINITY, -Float.MAX_VALUE, -2f,
-Float.MIN_VALUE, -0f, 0f, Float.MIN_VALUE, 2f, Float.MAX_VALUE,
Float.POSITIVE_INFINITY, Float.NaN };
for (int i = 0; i < values.length; i++) {
float f1 = values[i];
assertTrue("compare() should be equal: " + f1, Float.compare(f1, f1) == 0);
Float F1 = new Float(f1);
assertTrue("compareTo() should be equal: " + f1, F1.compareTo(F1) == 0);
for (int j = i + 1; j < values.length; j++) {
float f2 = values[j];
assertTrue("compare() " + f1 + " should be less " + f2,
Float.compare(f1, f2) == -1);
assertTrue("compare() " + f2 + " should be greater " + f1, Float
.compare(f2, f1) == 1);
Float F2 = new Float(f2);
assertTrue("compareTo() " + f1 + " should be less " + f2,
F1.compareTo(F2) == -1);
assertTrue("compareTo() " + f2 + " should be greater " + f1,
F2.compareTo(F1) == 1);
}
}
try {
new Float(0.0F).compareTo(null);
fail("No NPE");
} catch (NullPointerException e) {
}
}
/**
* java.lang.Float#doubleValue()
*/
public void test_doubleValue() {
// Test for method double java.lang.Float.doubleValue()
assertTrue("Incorrect double value returned", Math.abs(new Float(999999.999f)
.doubleValue() - 999999.999d) < 1);
}
/**
* java.lang.Float#floatToIntBits(float)
*/
public void test_floatToIntBitsF() {
float f = 9876.2345f;
int bits = Float.floatToIntBits(f);
float r = Float.intBitsToFloat(bits);
assertTrue("Incorrect intBits returned", f == r);
}
/**
* java.lang.Float#floatToRawIntBits(float)
*/
public void test_floatToRawIntBitsF() {
int i = 0x7fc004d2;
float f = Float.intBitsToFloat(i);
assertTrue("Wrong raw bits", Float.floatToRawIntBits(f) == i);
}
/**
* java.lang.Float#floatValue()
*/
public void test_floatValue() {
// Test for method float java.lang.Float.floatValue()
Float f = new Float(87.657f);
Float f2 = new Float(-0.876f);
assertTrue("Returned incorrect floatValue", f.floatValue() == 87.657f
&& (f2.floatValue() == -0.876f));
}
/**
* java.lang.Float#hashCode()
*/
public void test_hashCode() {
// Test for method int java.lang.Float.hashCode()
Float f = new Float(1908.8786f);
assertTrue("Returned invalid hash code for 1908.8786f", f.hashCode() == Float
.floatToIntBits(1908.8786f));
f = new Float(-1.112f);
assertTrue("Returned invalid hash code for -1.112", f.hashCode() == Float
.floatToIntBits(-1.112f));
f = new Float(0f);
assertTrue("Returned invalid hash code for 0", f.hashCode() == Float.floatToIntBits(0f));
}
/**
* java.lang.Float#intBitsToFloat(int)
*/
public void test_intBitsToFloatI() {
float f = 9876.2345f;
int bits = Float.floatToIntBits(f);
float r = Float.intBitsToFloat(bits);
assertEquals("Incorrect intBits returned", f, r, 0F);
}
/**
* java.lang.Float#intValue()
*/
public void test_intValue() {
// Test for method int java.lang.Float.intValue()
Float f = new Float(0.46874f);
Float f2 = new Float(90.8f);
assertTrue("Returned incorrect int value", f.intValue() == 0 && f2.intValue() == 90);
}
/**
* java.lang.Float#isInfinite()
*/
public void test_isInfinite() {
// Test for method boolean java.lang.Float.isInfinite()
assertTrue("Infinity check failed",
(new Float(Float.POSITIVE_INFINITY).isInfinite() && new Float(
Float.NEGATIVE_INFINITY).isInfinite())
&& !(new Float(0.13131414f).isInfinite()));
}
/**
* java.lang.Float#isInfinite(float)
*/
public void test_isInfiniteF() {
// Test for method boolean java.lang.Float.isInfinite(float)
assertTrue("Infinity check failed", Float.isInfinite(Float.POSITIVE_INFINITY)
&& (Float.isInfinite(Float.NEGATIVE_INFINITY)) && !(Float.isInfinite(1.0f)));
}
/**
* java.lang.Float#isNaN()
*/
public void test_isNaN() {
// Test for method boolean java.lang.Float.isNaN()
assertTrue("NAN check failed", new Float(Float.NaN).isNaN()
&& !(new Float(1.0f).isNaN()));
}
/**
* java.lang.Float#isNaN(float)
*/
public void test_isNaNF() {
// Test for method boolean java.lang.Float.isNaN(float)
assertTrue("NaN check failed", Float.isNaN(Float.NaN) && !(Float.isNaN(12.09f)));
}
/**
* java.lang.Float#longValue()
*/
public void test_longValue() {
// Test for method long java.lang.Float.longValue()
Float f = new Float(0.46874f);
Float f2 = new Float(90.8f);
assertTrue("Returned incorrect long value", f.longValue() == 0 && f2.longValue() == 90);
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloatLjava_lang_String() {
assertEquals("Incorrect float returned, expected zero.", 0.0, Float
.parseFloat("7.0064923216240853546186479164495e-46"), 0.0);
assertEquals("Incorrect float returned, expected minimum float.", Float.MIN_VALUE,
Float.parseFloat("7.0064923216240853546186479164496e-46"), 0.0);
doTestCompareRawBits(
"0.000000000000000000000000000000000000011754942807573642917278829910357665133228589927589904276829631184250030649651730385585324256680905818939208984375",
0x800000, "1.17549435E-38");
doTestCompareRawBits(
"0.00000000000000000000000000000000000001175494280757364291727882991035766513322858992758990427682963118425003064965173038558532425668090581893920898437499999f",
0x7fffff, "1.1754942E-38");
/* Test a set of regular floats with exponents from -38 to +38 */
for (int i = 38; i > 3; i--) {
String testString;
testString = "3.4028234663852886e-" + i;
doTestCompareRawBits(testString, rawBitsFor3_4eN38To38[38 - i],
expectedStringFor3_4eN38To38[38 - i]);
}
doTestCompareRawBits("3.4028234663852886e-3", rawBitsFor3_4eN38To38[38 - 3],
expectedStringFor3_4eN38To38[38 - 3]);
doTestCompareRawBits("3.4028234663852886e-2", rawBitsFor3_4eN38To38[38 - 2],
expectedStringFor3_4eN38To38[38 - 2]);
doTestCompareRawBits("3.4028234663852886e-1", rawBitsFor3_4eN38To38[38 - 1],
expectedStringFor3_4eN38To38[38 - 1]);
doTestCompareRawBits("3.4028234663852886e-0", rawBitsFor3_4eN38To38[38 - 0],
expectedStringFor3_4eN38To38[38 - 0]);
doTestCompareRawBits("3.4028234663852886e+1", rawBitsFor3_4eN38To38[38 + 1],
expectedStringFor3_4eN38To38[38 + 1]);
doTestCompareRawBits("3.4028234663852886e+2", rawBitsFor3_4eN38To38[38 + 2],
expectedStringFor3_4eN38To38[38 + 2]);
doTestCompareRawBits("3.4028234663852886e+3", rawBitsFor3_4eN38To38[38 + 3],
expectedStringFor3_4eN38To38[38 + 3]);
doTestCompareRawBits("3.4028234663852886e+4", rawBitsFor3_4eN38To38[38 + 4],
expectedStringFor3_4eN38To38[38 + 4]);
doTestCompareRawBits("3.4028234663852886e+5", rawBitsFor3_4eN38To38[38 + 5],
expectedStringFor3_4eN38To38[38 + 5]);
doTestCompareRawBits("3.4028234663852886e+6", rawBitsFor3_4eN38To38[38 + 6],
expectedStringFor3_4eN38To38[38 + 6]);
for (int i = 7; i < 39; i++) {
String testString;
testString = "3.4028234663852886e+" + i;
doTestCompareRawBits(testString, rawBitsFor3_4eN38To38[38 + i],
expectedStringFor3_4eN38To38[38 + i]);
}
/* Test another set of regular floats with exponents from -38 to +38 */
for (int i = 38; i > 3; i--) {
String testString;
testString = "-1.1754943508222875e-" + i;
doTestCompareRawBits(testString, rawBitsFor1_17eN38To38[38 - i],
expectedStringFor1_17eN38To38[38 - i]);
}
doTestCompareRawBits("-1.1754943508222875e-3", rawBitsFor1_17eN38To38[38 - 3],
expectedStringFor1_17eN38To38[38 - 3]);
doTestCompareRawBits("-1.1754943508222875e-2", rawBitsFor1_17eN38To38[38 - 2],
expectedStringFor1_17eN38To38[38 - 2]);
doTestCompareRawBits("-1.1754943508222875e-1", rawBitsFor1_17eN38To38[38 - 1],
expectedStringFor1_17eN38To38[38 - 1]);
doTestCompareRawBits("-1.1754943508222875e-0", rawBitsFor1_17eN38To38[38 - 0],
expectedStringFor1_17eN38To38[38 - 0]);
doTestCompareRawBits("-1.1754943508222875e+1", rawBitsFor1_17eN38To38[38 + 1],
expectedStringFor1_17eN38To38[38 + 1]);
doTestCompareRawBits("-1.1754943508222875e+2", rawBitsFor1_17eN38To38[38 + 2],
expectedStringFor1_17eN38To38[38 + 2]);
doTestCompareRawBits("-1.1754943508222875e+3", rawBitsFor1_17eN38To38[38 + 3],
expectedStringFor1_17eN38To38[38 + 3]);
doTestCompareRawBits("-1.1754943508222875e+4", rawBitsFor1_17eN38To38[38 + 4],
expectedStringFor1_17eN38To38[38 + 4]);
doTestCompareRawBits("-1.1754943508222875e+5", rawBitsFor1_17eN38To38[38 + 5],
expectedStringFor1_17eN38To38[38 + 5]);
doTestCompareRawBits("-1.1754943508222875e+6", rawBitsFor1_17eN38To38[38 + 6],
expectedStringFor1_17eN38To38[38 + 6]);
for (int i = 7; i < 39; i++) {
String testString;
testString = "-1.1754943508222875e+" + i;
doTestCompareRawBits(testString, rawBitsFor1_17eN38To38[38 + i],
expectedStringFor1_17eN38To38[38 + i]);
}
/* Test denormalized floats (floats with exponents <= -38 */
doTestCompareRawBits("1.1012984643248170E-45", 1, "1.4E-45");
doTestCompareRawBits("-1.1012984643248170E-45", 0x80000001, "-1.4E-45");
doTestCompareRawBits("1.0E-45", 1, "1.4E-45");
doTestCompareRawBits("-1.0E-45", 0x80000001, "-1.4E-45");
doTestCompareRawBits("0.9E-45", 1, "1.4E-45");
doTestCompareRawBits("-0.9E-45", 0x80000001, "-1.4E-45");
doTestCompareRawBits("4.203895392974451e-45", 3, "4.2E-45");
doTestCompareRawBits("-4.203895392974451e-45", 0x80000003, "-4.2E-45");
doTestCompareRawBits("0.004E-45", 0, "0.0");
doTestCompareRawBits("-0.004E-45", 0x80000000, "-0.0");
/*
* Test for large floats close to and greater than 3.4028235E38 and
* -3.4028235E38
*/
doTestCompareRawBits("1.2E+38", 0x7eb48e52, "1.2E38");
doTestCompareRawBits("-1.2E+38", 0xfeb48e52, "-1.2E38");
doTestCompareRawBits("3.2E+38", 0x7f70bdc2, "3.2E38");
doTestCompareRawBits("-3.2E+38", 0xff70bdc2, "-3.2E38");
doTestCompareRawBits("3.4E+38", 0x7f7fc99e, "3.4E38");
doTestCompareRawBits("-3.4E+38", 0xff7fc99e, "-3.4E38");
doTestCompareRawBits("3.4028234663852886E+38", 0x7f7fffff, "3.4028235E38");
doTestCompareRawBits("-3.4028234663852886E+38", 0xff7fffff, "-3.4028235E38");
doTestCompareRawBits("3.405E+38", 0x7f800000, "Infinity");
doTestCompareRawBits("-3.405E+38", 0xff800000, "-Infinity");
doTestCompareRawBits("3.41E+38", 0x7f800000, "Infinity");
doTestCompareRawBits("-3.41E+38", 0xff800000, "-Infinity");
doTestCompareRawBits("3.42E+38", 0x7f800000, "Infinity");
doTestCompareRawBits("-3.42E+38", 0xff800000, "-Infinity");
doTestCompareRawBits("1.0E+39", 0x7f800000, "Infinity");
doTestCompareRawBits("-1.0E+39", 0xff800000, "-Infinity");
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_Unusual() {
float actual;
actual = Float.parseFloat("0x00000000000000000000000000000000000000000.0000000000000000000000000000000000000p0000000000000000000000000000000000");
assertEquals("Returned incorrect value", 0.0f, actual, 0.0F);
actual = Float.parseFloat("+0Xfffff.fffffffffffffffffffffffffffffffp+99F");
assertEquals("Returned incorrect value", 6.64614E35f, actual, 0.0F);
actual = Float.parseFloat("-0X.123456789abcdefp+99f");
assertEquals("Returned incorrect value", -4.5072022E28f, actual, 0.0F);
actual = Float.parseFloat("-0X123456789abcdef.p+1f");
assertEquals("Returned incorrect value", -1.63971062E17f, actual, 0.0F);
actual = Float.parseFloat("-0X000000000000000000000000000001abcdef.0000000000000000000000000001abefp00000000000000000000000000000000000000000004f");
assertEquals("Returned incorrect value", -4.48585472E8f, actual, 0.0F);
actual = Float.parseFloat("0X0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001234p600f");
assertEquals("Returned incorrect value", 5.907252E33f, actual, 0.0F);
actual = Float.parseFloat("0x1.p9223372036854775807");
assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, actual, 0.0F);
actual = Float.parseFloat("0x1.p9223372036854775808");
assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, actual, 0.0F);
actual = Float.parseFloat("0x10.p9223372036854775808");
assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, actual, 0.0F);
actual = Float.parseFloat("0xabcd.ffffffffp+2000");
assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, actual, 0.0F);
actual = Float.parseFloat("0x1.p-9223372036854775808");
assertEquals("Returned incorrect value", 0.0f, actual, 0.0F);
actual = Float.parseFloat("0x1.p-9223372036854775809");
assertEquals("Returned incorrect value", 0.0f, actual, 0.0F);
actual = Float.parseFloat("0x.1p-9223372036854775809");
assertEquals("Returned incorrect value", 0.0f, actual, 0.0F);
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_NormalPositiveExponent() {
int[] expecteds = {
0x3991a2b4, 0x43cc0247, 0x47909009,
0x4ac0c009, 0x4e109005, 0x5140c005,
0x5458d805, 0x57848402, 0x5a909002,
0x5da8a802, 0x60c0c002, 0x63cccc02,
0x66e4e402, 0x69f0f002, 0x6d048401,
0x70109001, 0x73169601, 0x76810810,
0x79840840, 0x7c8a08a0, 0x7f800000,
0x7f800000, 0x7f800000, 0x7f800000,
0x7f800000,
};
for (int i = 0; i < expecteds.length; i++) {
int part = i * 6;
String inputString = "0x" + part + "." + part + "0123456789abcdefp" + part;
float actual = Float.parseFloat(inputString);
float expected = Float.intBitsToFloat(expecteds[i]);
String expectedString = Integer.toHexString(Float.floatToIntBits(expected));
String actualString = Integer.toHexString(Float.floatToIntBits(actual));
String errorMsg = i + "th input string is:<" + inputString
+ ">.The expected result should be:<" + expectedString
+ ">, but was: <" + actualString + ">. ";
assertEquals(errorMsg, expected, actual, 0.0F);
}
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_NormalNegativeExponent() {
int[] expecteds = {
0x3991a2b4,
0x3d6e0247,
0x3aa0a009,
0x37848405,
0x3420a005,
0x30d4d405,
0x2d848402,
0x2a129202,
0x26acac02,
0x2346c602,
0x1fe0e002,
0x1c6eee02,
0x19048401,
0x15919101,
0x12189801,
0xf028828,
0xb890890,
0x80c88c8,
0x4930930,
0x1198998,
0x28028,
0x51c,
0xb,
0x0,
0x0,
};
for (int i = 0; i < expecteds.length; i++) {
int part = i * 7;
String inputString = "0x" + part + "." + part + "0123456789abcdefp-" + part;
float actual = Float.parseFloat(inputString);
float expected = Float.intBitsToFloat(expecteds[i]);
String expectedString = Integer.toHexString(Float.floatToIntBits(expected));
String actualString = Integer.toHexString(Float.floatToIntBits(actual));
String errorMsg = i + "th input string is:<" + inputString
+ ">.The expected result should be:<" + expectedString
+ ">, but was: <" + actualString + ">. ";
assertEquals(errorMsg, expected, actual, 0.0F);
}
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_MaxNormalBoundary() {
int[] expecteds = {
0x7f7fffff,
0x7f7fffff,
0x7f7fffff,
0x7f800000,
0x7f800000,
0x7f800000,
0xff7fffff,
0xff7fffff,
0xff7fffff,
0xff800000,
0xff800000,
0xff800000,
};
String[] inputs = {
"0x1.fffffep127",
"0x1.fffffe000000000000000000000000000000000000000000000001p127",
"0x1.fffffeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp127",
"0x1.ffffffp127",
"0x1.ffffff000000000000000000000000000000000000000000000001p127",
"0x1.ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp127",
"-0x1.fffffep127",
"-0x1.fffffe000000000000000000000000000000000000000000000001p127",
"-0x1.fffffeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp127",
"-0x1.ffffffp127",
"-0x1.ffffff000000000000000000000000000000000000000000000001p127",
"-0x1.ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp127",
};
for (int i = 0; i < inputs.length; i++) {
float actual = Float.parseFloat(inputs[i]);
float expected = Float.intBitsToFloat(expecteds[i]);
String expectedString = Integer.toHexString(Float.floatToIntBits(expected));
String actualString = Integer.toHexString(Float.floatToIntBits(actual));
String errorMsg = i + "th input string is:<" + inputs[i]
+ ">.The expected result should be:<" + expectedString
+ ">, but was: <" + actualString + ">. ";
assertEquals(errorMsg, expected, actual, 0.0F);
}
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_MinNormalBoundary() {
int expecteds[] = {
0x800000,
0x800000,
0x800000,
0x800000,
0x800001,
0x800001,
0x80800000,
0x80800000,
0x80800000,
0x80800000,
0x80800001,
0x80800001,
};
String inputs[] = {
"0x1.0p-126",
"0x1.00000000000000000000000000000000000000000000001p-126",
"0x1.000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"0x1.000001p-126",
"0x1.000001000000000000000000000000000000000000000001p-126",
"0x1.000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"-0x1.0p-126",
"-0x1.00000000000000000000000000000000000000000000001p-126",
"-0x1.000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"-0x1.000001p-126",
"-0x1.000001000000000000000000000000000000000000000001p-126",
"-0x1.000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
};
for (int i = 0; i < inputs.length; i++) {
float actual = Float.parseFloat(inputs[i]);
float expected = Float.intBitsToFloat(expecteds[i]);
String expectedString = Integer.toHexString(Float.floatToIntBits(expected));
String actualString = Integer.toHexString(Float.floatToIntBits(actual));
String errorMsg = i + "th input string is:<" + inputs[i]
+ ">.The expected result should be:<" + expectedString
+ ">, but was: <" + actualString + ">. ";
assertEquals(errorMsg, expected, actual, 0.0F);
}
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_MaxSubNormalBoundary() {
int expecteds[] = {
0x7fffff,
0x7fffff,
0x7fffff,
0x800000,
0x800000,
0x800000,
0x807fffff,
0x807fffff,
0x807fffff,
0x80800000,
0x80800000,
0x80800000,
};
String inputs[] = {
"0x0.fffffep-126",
"0x0.fffffe000000000000000000000000000000000000000000000000000001p-126",
"0x0.fffffefffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"0x0.ffffffp-126",
"0x0.ffffff0000000000000000000000000000000000000000000000000000001p-126",
"0x0.ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"-0x0.fffffep-126",
"-0x0.fffffe000000000000000000000000000000000000000000000000000001p-126",
"-0x0.fffffefffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"-0x0.ffffffp-126",
"-0x0.ffffff0000000000000000000000000000000000000000000000000000001p-126",
"-0x0.ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
};
for (int i = 0; i < inputs.length; i++) {
float actual = Float.parseFloat(inputs[i]);
float expected = Float.intBitsToFloat(expecteds[i]);
String expectedString = Integer.toHexString(Float.floatToIntBits(expected));
String actualString = Integer.toHexString(Float.floatToIntBits(actual));
String errorMsg = i + "th input string is:<" + inputs[i]
+ ">.The expected result should be:<" + expectedString
+ ">, but was: <" + actualString + ">. ";
assertEquals(errorMsg, expected, actual, 0.0F);
}
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_MinSubNormalBoundary() {
int expecteds[] = {
0x1,
0x1,
0x1,
0x2,
0x2,
0x2,
0x80000001,
0x80000001,
0x80000001,
0x80000002,
0x80000002,
0x80000002,
};
String inputs[] = {
"0x0.000002p-126",
"0x0.00000200000000000000000000000000000000000001p-126",
"0x0.000002ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"0x0.000003p-126",
"0x0.000003000000000000000000000000000000000000001p-126",
"0x0.000003ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"-0x0.000002p-126",
"-0x0.00000200000000000000000000000000000000000001p-126",
"-0x0.000002ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"-0x0.000003p-126",
"-0x0.000003000000000000000000000000000000000000001p-126",
"-0x0.000003ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
};
for (int i = 0; i < inputs.length; i++) {
float actual = Float.parseFloat(inputs[i]);
float expected = Float.intBitsToFloat(expecteds[i]);
String expectedString = Integer.toHexString(Float.floatToIntBits(expected));
String actualString = Integer.toHexString(Float.floatToIntBits(actual));
String errorMsg = i + "th input string is:<" + inputs[i]
+ ">.The expected result should be:<" + expectedString
+ ">, but was: <" + actualString + ">. ";
assertEquals(errorMsg, expected, actual, 0.0F);
}
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_ZeroBoundary() {
int expecteds[] = {
0x0,
0x0,
0x0,
0x0,
0x1,
0x1,
0x80000000,
0x80000000,
0x80000000,
0x80000000,
0x80000001,
0x80000001,
};
String inputs[] = {
"0x0.000000000000000p-126",
"0x0.000000000000000000000000000000000000000000000001p-126",
"0x0.000000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"0x0.000001p-126",
"0x0.000001000000000000000000000000000000000000000001p-126",
"0x0.000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"-0x0.000000000000000p-126",
"-0x0.000000000000000000000000000000000000000000000001p-126",
"-0x0.000000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
"-0x0.000001p-126",
"-0x0.000001000000000000000000000000000000000000000001p-126",
"-0x0.000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126",
};
for (int i = 0; i < inputs.length; i++) {
float actual = Float.parseFloat(inputs[i]);
float expected = Float.intBitsToFloat(expecteds[i]);
String expectedString = Integer.toHexString(Float.floatToIntBits(expected));
String actualString = Integer.toHexString(Float.floatToIntBits(actual));
String errorMsg = i + "th input string is:<" + inputs[i]
+ ">.The expected result should be:<" + expectedString
+ ">, but was: <" + actualString + ">. ";
assertEquals(errorMsg, expected, actual, 0.0F);
}
}
/**
* java.lang.Float#parseFloat(java.lang.String)
*/
public void test_parseFloat_LString_Harmony6261() {
// Regression test for HARMONY-6261
float f = new Float("2147483648");
assertEquals("2.1474836E9", Float.toString(f));
doTestCompareRawBits("123456790528.000000000000000f", 0x51e5f4c9, "1.2345679E11");
doTestCompareRawBits("8589934592", 0x50000000, "8.5899346E9");
doTestCompareRawBits("8606711808", 0x50004000, "8.606712E9");
}
/**
* java.lang.Float#shortValue()
*/
public void test_shortValue() {
// Test for method short java.lang.Float.shortValue()
Float f = new Float(0.46874f);
Float f2 = new Float(90.8f);
assertTrue("Returned incorrect short value", f.shortValue() == 0
&& f2.shortValue() == 90);
}
/**
* java.lang.Float#toString()
*/
public void test_toString() {
// Test for method java.lang.String java.lang.Float.toString()
test_toString(12.90898f, "12.90898");
test_toString(1.7014118346046924e+38F, "1.7014118E38");
test_toString(1E19F, "1.0E19");
test_toString(1E-36F, "1.0E-36");
test_toString(1.0E-38F, "1.0E-38");
}
/**
* java.lang.Float#toString(float)
*/
public void test_toStringF() {
// Test for method java.lang.String java.lang.Float.toString(float)
float ff;
String answer;
ff = 12.90898f;
answer = "12.90898";
assertTrue("Incorrect String representation want " + answer + ", got "
+ Float.toString(ff), Float.toString(ff).equals(answer));
ff = Float.MAX_VALUE;
answer = "3.4028235E38";
assertTrue("Incorrect String representation want " + answer + ", got "
+ Float.toString(ff), Float.toString(ff).equals(answer));
}
/**
* java.lang.Float#valueOf(java.lang.String)
*/
public void test_valueOfLjava_lang_String() {
// Test for method java.lang.Float
// java.lang.Float.valueOf(java.lang.String)
Float wanted = new Float(432.1235f);
Float got = Float.valueOf("432.1235");
assertTrue("Incorrect float returned--wanted: " + wanted + " but got: " + got, got
.equals(wanted));
wanted = new Float(0f);
got = Float.valueOf("0");
assertTrue("Incorrect float returned--wanted: " + wanted + " but got: " + got, got
.equals(wanted));
wanted = new Float(-1212.3232f);
got = Float.valueOf("-1212.3232");
assertTrue("Incorrect float returned--wanted: " + wanted + " but got: " + got, got
.equals(wanted));
try {
Float.valueOf(null);
fail("Expected Float.valueOf(null) to throw NPE.");
} catch (NullPointerException ex) {
// expected
}
try {
Float.valueOf("");
fail("Expected Float.valueOf(\"\") to throw NFE");
} catch (NumberFormatException e) {
// expected
}
Float posZero = Float.valueOf("+0.0");
Float negZero = Float.valueOf("-0.0");
assertFalse("Floattest0", posZero.equals(negZero));
assertTrue("Floattest1", 0.0f == -0.0f);
// Tests for float values by name.
Float expectedNaN = new Float(Float.NaN);
Float posNaN = Float.valueOf("NaN");
assertTrue("Floattest2", posNaN.equals(expectedNaN));
Float posNaNSigned = Float.valueOf("+NaN");
assertTrue("Floattest3", posNaNSigned.equals(expectedNaN));
Float negNaNSigned = Float.valueOf("-NaN");
assertTrue("Floattest4", negNaNSigned.equals(expectedNaN));
Float posInfinite = Float.valueOf("Infinity");
assertTrue("Floattest5", posInfinite.equals(new Float(Float.POSITIVE_INFINITY)));
Float posInfiniteSigned = Float.valueOf("+Infinity");
assertTrue("Floattest6", posInfiniteSigned.equals(new Float(Float.POSITIVE_INFINITY)));
Float negInfiniteSigned = Float.valueOf("-Infinity");
assertTrue("Floattest7", negInfiniteSigned.equals(new Float(Float.NEGATIVE_INFINITY)));
// test HARMONY-6641
posInfinite = Float.valueOf("320.0E+2147483647");
assertEquals("Floattest8", Float.POSITIVE_INFINITY, posInfinite);
negZero = Float.valueOf("-1.4E-2147483314");
assertEquals("Floattest9", -0.0f, negZero);
}
private void test_toString(float ff, String answer) {
// Test for method java.lang.String java.lang.Double.toString(double)
assertTrue("Incorrect String representation want " + answer + ", got ("
+ Float.toString(ff) + ")", Float.toString(ff).equals(answer));
Float f = new Float(ff);
assertTrue("Incorrect String representation want " + answer + ", got ("
+ Float.toString(f.floatValue()) + ")", Float.toString(f.floatValue()).equals(
answer));
assertTrue("Incorrect String representation want " + answer + ", got (" + f.toString()
+ ")", f.toString().equals(answer));
}
/**
* java.lang.Float#compareTo(java.lang.Float)
* java.lang.Float#compare(float, float)
*/
public void test_compareToLjava_lang_Float() {
// A selection of float values in ascending order.
float[] values = new float[] { Float.NEGATIVE_INFINITY, -Float.MAX_VALUE, -2f,
-Float.MIN_VALUE, -0f, 0f, Float.MIN_VALUE, 2f, Float.MAX_VALUE,
Float.POSITIVE_INFINITY, Float.NaN };
for (int i = 0; i < values.length; i++) {
float f1 = values[i];
// Test that each value compares equal to itself; and each object is
// equal to another object
// like itself
assertTrue("Assert 0: compare() should be equal: " + f1, Float.compare(f1, f1) == 0);
Float objFloat = new Float(f1);
assertTrue("Assert 1: compareTo() should be equal: " + objFloat, objFloat
.compareTo(objFloat) == 0);
// Test that the Float-defined order is respected
for (int j = i + 1; j < values.length; j++) {
float f2 = values[j];
assertTrue("Assert 2: compare() " + f1 + " should be less " + f2, Float
.compare(f1, f2) == -1);
assertTrue("Assert 3: compare() " + f2 + " should be greater " + f1, Float
.compare(f2, f1) == 1);
Float F2 = new Float(f2);
assertTrue("Assert 4: compareTo() " + f1 + " should be less " + f2, objFloat
.compareTo(F2) == -1);
assertTrue("Assert 5: compareTo() " + f2 + " should be greater " + f1, F2
.compareTo(objFloat) == 1);
}
}
}
/**
* java.lang.Float#equals(java.lang.Object)
*/
public void test_equalsLjava_lang_Object() {
Float f1 = new Float(8765.4321f);
Float f2 = new Float(8765.4321f);
Float f3 = new Float(-1.0f);
assertTrue("Assert 0: Equality test failed", f1.equals(f2) && !(f1.equals(f3)));
assertTrue("Assert 1: NaN should not be == Nan", Float.NaN != Float.NaN);
assertTrue("Assert 2: NaN should not be == Nan", new Float(Float.NaN).equals(new Float(
Float.NaN)));
assertTrue("Assert 3: -0f should be == 0f", 0f == -0f);
assertTrue("Assert 4: -0f should not be equals() 0f", !new Float(0f).equals(new Float(
-0f)));
f1 = new Float(1098.576f);
f2 = new Float(1098.576f);
f3 = new Float(1.0f);
assertTrue("Equality test failed", f1.equals(f2) && !(f1.equals(f3)));
assertTrue("NaN should not be == Nan", Float.NaN != Float.NaN);
assertTrue("NaN should not be == Nan", new Float(Float.NaN)
.equals(new Float(Float.NaN)));
assertTrue("-0f should be == 0f", 0f == -0f);
assertTrue("-0f should not be equals() 0f", !new Float(0f).equals(new Float(-0f)));
}
/**
* java.lang.Float#toHexString(float)
*/
public void test_toHexStringF() {
// the follow values comes from the Float Javadoc/Spec
assertEquals("0x0.0p0", Float.toHexString(0.0F));
assertEquals("-0x0.0p0", Float.toHexString(-0.0F));
assertEquals("0x1.0p0", Float.toHexString(1.0F));
assertEquals("-0x1.0p0", Float.toHexString(-1.0F));
assertEquals("0x1.0p1", Float.toHexString(2.0F));
assertEquals("0x1.8p1", Float.toHexString(3.0F));
assertEquals("0x1.0p-1", Float.toHexString(0.5F));
assertEquals("0x1.0p-2", Float.toHexString(0.25F));
assertEquals("0x1.fffffep127", Float.toHexString(Float.MAX_VALUE));
assertEquals("0x0.000002p-126", Float.toHexString(Float.MIN_VALUE));
// test edge cases
assertEquals("NaN", Float.toHexString(Float.NaN));
assertEquals("-Infinity", Float.toHexString(Float.NEGATIVE_INFINITY));
assertEquals("Infinity", Float.toHexString(Float.POSITIVE_INFINITY));
// test various numbers
assertEquals("-0x1.da8p6", Float.toHexString(-118.625F));
assertEquals("0x1.295788p23", Float.toHexString(9743299.65F));
assertEquals("0x1.295788p23", Float.toHexString(9743299.65000F));
assertEquals("0x1.295788p23", Float.toHexString(9743299.650001234F));
assertEquals("0x1.700d1p33", Float.toHexString(12349743299.65000F));
// test HARMONY-2132
assertEquals("0x1.01p10", Float.toHexString(0x1.01p10f));
}
/**
* java.lang.Float#valueOf(float)
*/
public void test_valueOfF() {
assertEquals(new Float(Float.MIN_VALUE), Float.valueOf(Float.MIN_VALUE));
assertEquals(new Float(Float.MAX_VALUE), Float.valueOf(Float.MAX_VALUE));
assertEquals(new Float(0), Float.valueOf(0));
int s = -128;
while (s < 128) {
assertEquals(new Float(s), Float.valueOf(s));
assertEquals(new Float(s + 0.1F), Float.valueOf(s + 0.1F));
assertEquals(Float.valueOf(s + 0.1F), Float.valueOf(s + 0.1F));
s++;
}
}
/**
* {@link java.lang.Float#MAX_EXPONENT}
* @since 1.6
*/
public void test_MAX_EXPONENT() {
assertTrue("Wrong value of java.lang.Float.MAX_EXPONENT",
Float.MAX_EXPONENT == 127);
assertTrue("Wrong value of java.lang.Float.MAX_EXPONENT",
Float.MAX_EXPONENT == Math.getExponent(Float.MAX_VALUE));
}
/**
* {@link java.lang.Float#MIN_EXPONENT}
* @since 1.6
*/
public void test_MIN_EXPONENT() {
assertTrue("Wrong value of java.lang.Float.MIN_EXPONENT",
Float.MIN_EXPONENT == -126);
assertTrue("Wrong value of java.lang.Float.MIN_EXPONENT",
Float.MIN_EXPONENT == Math.getExponent(Float.MIN_NORMAL));
}
/**
* {@link java.lang.Float#MIN_NORMAL}
* @since 1.6
*/
public void test_MIN_NORMAL() {
assertTrue("Wrong value of java.lang.Float.MIN_NORMAL",
Float.MIN_NORMAL == 0x1.0p-126f);
assertTrue("Wrong value of java.lang.Float.MIN_NORMAL",
Float.MIN_NORMAL == Float.intBitsToFloat(0x00800000));
assertTrue("Wrong value of java.lang.Float.MIN_NORMAL",
Float.MIN_NORMAL == 1.1754943508222875E-38f);
}
}