1 /* Licensed to the Apache Software Foundation (ASF) under one or more 2 * contributor license agreements. See the NOTICE file distributed with 3 * this work for additional information regarding copyright ownership. 4 * The ASF licenses this file to You under the Apache License, Version 2.0 5 * (the "License"); you may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.apache.harmony.luni.tests.java.lang; 18 19 import junit.framework.TestCase; 20 21 public class FloatTest extends TestCase { 22 23 private static final int rawBitsFor3_4eN38To38[] = { 0x1394470, 0x2e7958c, 0x490bd77, 0x634ecd5, 24 0x7e2280b, 0x98d5907, 0xb30af48, 0xcdcdb1a, 0xe8a08f0, 0x102c8b2d, 0x11d7adf8, 25 0x1386ccbb, 0x15287fe9, 0x16d29fe4, 0x1883a3ee, 0x1a248cea, 0x1bcdb025, 0x1d808e17, 26 0x1f20b19d, 0x20c8de04, 0x227b1585, 0x241ced73, 0x25c428d0, 0x27753303, 0x29193fe2, 27 0x2abf8fdb, 0x2c6f73d1, 0x2e15a863, 0x2fbb127c, 0x3169d71a, 0x33122671, 0x34b6b00d, 28 0x36645c10, 0x380eb98a, 0x39b267ec, 0x3b5f01e8, 0x3d0b6131, 0x3eae397d, 0x4059c7dc, 29 0x42081cea, 0x43aa2424, 0x4554ad2d, 0x4704ec3c, 0x48a6274b, 0x4a4fb11e, 0x4c01ceb3, 30 0x4da2425f, 0x4f4ad2f7, 0x50fd87b5, 0x529e74d1, 0x54461205, 0x55f79687, 0x579abe14, 31 0x59416d99, 0x5af1c900, 0x5c971da0, 0x5e3ce508, 0x5fec1e4a, 0x619392ee, 0x633877a9, 32 0x64e69594, 0x66901d7c, 0x683424dc, 0x69e12e12, 0x6b8cbccb, 0x6d2febfe, 0x6edbe6fe, 33 0x7089705f, 0x722bcc76, 0x73d6bf94, 0x758637bc, 0x7727c5ac, 0x78d1b717, 0x7a83126e, 34 0x7c23d70a, 0x7dcccccc, 0x7f7fffff }; 35 36 private static final String expectedStringFor3_4eN38To38[] = { "3.4028235E-38", "3.4028235E-37", 37 "3.4028233E-36", "3.4028234E-35", "3.4028236E-34", "3.4028236E-33", 38 "3.4028234E-32", "3.4028234E-31", "3.4028233E-30", "3.4028236E-29", 39 "3.4028235E-28", "3.4028235E-27", "3.4028233E-26", "3.4028235E-25", 40 "3.4028233E-24", "3.4028235E-23", "3.4028236E-22", "3.4028235E-21", 41 "3.4028236E-20", "3.4028236E-19", "3.4028236E-18", "3.4028235E-17", 42 "3.4028236E-16", "3.4028234E-15", "3.4028234E-14", "3.4028235E-13", 43 "3.4028234E-12", "3.4028235E-11", "3.4028236E-10", "3.4028234E-9", "3.4028236E-8", 44 "3.4028236E-7", "3.4028235E-6", "3.4028235E-5", "3.4028233E-4", "0.0034028236", 45 "0.034028236", "0.34028235", "3.4028234", "34.028236", "340.28235", "3402.8235", 46 "34028.234", "340282.34", "3402823.5", "3.4028236E7", "3.40282336E8", 47 "3.40282342E9", "3.40282348E10", "3.40282343E11", "3.40282337E12", "3.40282353E13", 48 "3.4028234E14", "3.4028234E15", "3.40282356E16", "3.40282356E17", "3.40282356E18", 49 "3.4028236E19", "3.4028235E20", "3.4028233E21", "3.4028235E22", "3.4028233E23", 50 "3.4028236E24", "3.4028234E25", "3.4028233E26", "3.4028234E27", "3.4028235E28", 51 "3.4028236E29", "3.4028233E30", "3.4028235E31", "3.4028233E32", "3.4028236E33", 52 "3.4028236E34", "3.4028234E35", "3.4028236E36", "3.4028235E37", "3.4028235E38" }; 53 54 private static final int rawBitsFor1_17eN38To38[] = { 0x80800000, 0x82200000, 0x83c80000, 55 0x857a0000, 0x871c4000, 0x88c35000, 0x8a742400, 0x8c189680, 0x8dbebc20, 0x8f6e6b28, 56 0x911502f9, 0x92ba43b7, 0x9468d4a5, 0x961184e7, 0x97b5e621, 0x99635fa9, 0x9b0e1bca, 57 0x9cb1a2bc, 0x9e5e0b6b, 0xa00ac723, 0xa1ad78ec, 0xa358d727, 0xa5078678, 0xa6a96816, 58 0xa853c21c, 0xaa045951, 0xaba56fa6, 0xad4ecb8f, 0xaf013f39, 0xb0a18f08, 0xb249f2ca, 59 0xb3fc6f7c, 0xb59dc5ae, 0xb7453719, 0xb8f684df, 0xba9a130c, 0xbc4097ce, 0xbdf0bdc2, 60 0xbf967699, 0xc13c1440, 0xc2eb1950, 0xc492efd2, 0xc637abc6, 0xc7e596b8, 0xc98f7e33, 61 0xcb335dc0, 0xcce0352f, 0xce8c213e, 0xd02f298d, 0xd1daf3f0, 0xd388d876, 0xd52b0e94, 62 0xd6d5d239, 0xd885a363, 0xda270c3c, 0xdbd0cf4b, 0xdd82818f, 0xdf2321f3, 0xe0cbea70, 63 0xe27ee50b, 0xe41f4f27, 0xe5c722f1, 0xe778ebad, 0xe91b934c, 0xeac2781f, 0xec731627, 64 0xee17edd8, 0xefbde94f, 0xf16d63a2, 0xf3145e45, 0xf4b975d7, 0xf667d34c, 0xf810e410, 65 0xf9b51d14, 0xfb626459, 0xfd0d7eb7, 0xfeb0de65 }; 66 67 private static final String expectedStringFor1_17eN38To38[] = { "-1.17549435E-38", 68 "-1.1754944E-37", "-1.17549435E-36", "-1.17549435E-35", "-1.1754944E-34", 69 "-1.17549435E-33", "-1.17549435E-32", "-1.1754944E-31", "-1.17549435E-30", 70 "-1.17549435E-29", "-1.1754944E-28", "-1.1754943E-27", "-1.17549435E-26", 71 "-1.1754943E-25", "-1.1754944E-24", "-1.1754943E-23", "-1.1754944E-22", 72 "-1.1754943E-21", "-1.1754943E-20", "-1.1754943E-19", "-1.1754944E-18", 73 "-1.1754944E-17", "-1.1754943E-16", "-1.1754943E-15", "-1.1754944E-14", 74 "-1.1754943E-13", "-1.1754944E-12", "-1.1754943E-11", "-1.1754943E-10", 75 "-1.1754944E-9", "-1.1754944E-8", "-1.1754943E-7", "-1.1754944E-6", 76 "-1.1754943E-5", "-1.1754943E-4", "-0.0011754944", "-0.011754943", "-0.117549434", 77 "-1.1754943", "-11.754944", "-117.54944", "-1175.4944", "-11754.943", "-117549.44", 78 "-1175494.4", "-1.1754944E7", "-1.17549432E8", "-1.1754944E9", "-1.17549435E10", 79 "-1.17549433E11", "-1.17549433E12", "-1.17549438E13", "-1.17549438E14", 80 "-1.1754943E15", "-1.17549432E16", "-1.17549432E17", "-1.17549434E18", 81 "-1.1754944E19", "-1.1754944E20", "-1.1754943E21", "-1.1754943E22", 82 "-1.1754944E23", "-1.17549434E24", "-1.1754943E25", "-1.1754943E26", 83 "-1.17549434E27", "-1.1754943E28", "-1.1754944E29", "-1.1754943E30", 84 "-1.1754943E31", "-1.1754944E32", "-1.1754943E33", "-1.1754944E34", 85 "-1.1754944E35", "-1.1754944E36", "-1.1754943E37", "-1.1754943E38" }; 86 87 private void doTestCompareRawBits(String originalFloatString, int expectedRawBits, 88 String expectedString) { 89 int rawBits; 90 float result = Float.parseFloat(originalFloatString); 91 rawBits = Float.floatToIntBits(result); 92 assertEquals("Original float(" + originalFloatString + ") Converted float(" + result 93 + ") Expecting:" + Integer.toHexString(expectedRawBits) + " Got: " 94 + Integer.toHexString(rawBits), expectedRawBits, rawBits); 95 } 96 97 /** 98 * @tests java.lang.Float#Float(float) 99 */ 100 public void test_ConstructorF() { 101 // Test for method java.lang.Float(float) 102 103 Float f = new Float(900.89f); 104 assertTrue("Created incorrect float", f.floatValue() == 900.89f); 105 } 106 107 /** 108 * @tests java.lang.Float#Float(java.lang.String) 109 */ 110 public void test_ConstructorLjava_lang_String() { 111 // Test for method java.lang.Float(java.lang.String) 112 113 Float f = new Float("900.89"); 114 assertTrue("Created incorrect Float", f.floatValue() == 900.89f); 115 } 116 117 /** 118 * @tests java.lang.Float#byteValue() 119 */ 120 public void test_byteValue() { 121 // Test for method byte java.lang.Float.byteValue() 122 Float f = new Float(0.46874f); 123 Float f2 = new Float(90.8f); 124 assertTrue("Returned incorrect byte value", f.byteValue() == 0 && f2.byteValue() == 90); 125 } 126 127 /** 128 * @tests java.lang.Float#compareTo(java.lang.Float) 129 * @tests java.lang.Float#compare(float, float) 130 */ 131 public void test_compare() { 132 float[] values = new float[] { Float.NEGATIVE_INFINITY, -Float.MAX_VALUE, -2f, 133 -Float.MIN_VALUE, -0f, 0f, Float.MIN_VALUE, 2f, Float.MAX_VALUE, 134 Float.POSITIVE_INFINITY, Float.NaN }; 135 for (int i = 0; i < values.length; i++) { 136 float f1 = values[i]; 137 assertTrue("compare() should be equal: " + f1, Float.compare(f1, f1) == 0); 138 Float F1 = new Float(f1); 139 assertTrue("compareTo() should be equal: " + f1, F1.compareTo(F1) == 0); 140 for (int j = i + 1; j < values.length; j++) { 141 float f2 = values[j]; 142 assertTrue("compare() " + f1 + " should be less " + f2, 143 Float.compare(f1, f2) == -1); 144 assertTrue("compare() " + f2 + " should be greater " + f1, Float 145 .compare(f2, f1) == 1); 146 Float F2 = new Float(f2); 147 assertTrue("compareTo() " + f1 + " should be less " + f2, 148 F1.compareTo(F2) == -1); 149 assertTrue("compareTo() " + f2 + " should be greater " + f1, 150 F2.compareTo(F1) == 1); 151 } 152 } 153 154 try { 155 new Float(0.0F).compareTo(null); 156 fail("No NPE"); 157 } catch (NullPointerException e) { 158 } 159 } 160 161 /** 162 * @tests java.lang.Float#doubleValue() 163 */ 164 public void test_doubleValue() { 165 // Test for method double java.lang.Float.doubleValue() 166 assertTrue("Incorrect double value returned", Math.abs(new Float(999999.999f) 167 .doubleValue() - 999999.999d) < 1); 168 } 169 170 /** 171 * @tests java.lang.Float#floatToIntBits(float) 172 */ 173 public void test_floatToIntBitsF() { 174 float f = 9876.2345f; 175 int bits = Float.floatToIntBits(f); 176 float r = Float.intBitsToFloat(bits); 177 assertTrue("Incorrect intBits returned", f == r); 178 } 179 180 /** 181 * @tests java.lang.Float#floatToRawIntBits(float) 182 */ 183 public void test_floatToRawIntBitsF() { 184 int i = 0x7fc004d2; 185 float f = Float.intBitsToFloat(i); 186 assertTrue("Wrong raw bits", Float.floatToRawIntBits(f) == i); 187 } 188 189 /** 190 * @tests java.lang.Float#floatValue() 191 */ 192 public void test_floatValue() { 193 // Test for method float java.lang.Float.floatValue() 194 Float f = new Float(87.657f); 195 Float f2 = new Float(-0.876f); 196 assertTrue("Returned incorrect floatValue", f.floatValue() == 87.657f 197 && (f2.floatValue() == -0.876f)); 198 199 } 200 201 /** 202 * @tests java.lang.Float#hashCode() 203 */ 204 public void test_hashCode() { 205 // Test for method int java.lang.Float.hashCode() 206 Float f = new Float(1908.8786f); 207 assertTrue("Returned invalid hash code for 1908.8786f", f.hashCode() == Float 208 .floatToIntBits(1908.8786f)); 209 210 f = new Float(-1.112f); 211 assertTrue("Returned invalid hash code for -1.112", f.hashCode() == Float 212 .floatToIntBits(-1.112f)); 213 214 f = new Float(0f); 215 assertTrue("Returned invalid hash code for 0", f.hashCode() == Float.floatToIntBits(0f)); 216 217 } 218 219 /** 220 * @tests java.lang.Float#intBitsToFloat(int) 221 */ 222 public void test_intBitsToFloatI() { 223 float f = 9876.2345f; 224 int bits = Float.floatToIntBits(f); 225 float r = Float.intBitsToFloat(bits); 226 assertEquals("Incorrect intBits returned", f, r, 0F); 227 } 228 229 /** 230 * @tests java.lang.Float#intValue() 231 */ 232 public void test_intValue() { 233 // Test for method int java.lang.Float.intValue() 234 Float f = new Float(0.46874f); 235 Float f2 = new Float(90.8f); 236 assertTrue("Returned incorrect int value", f.intValue() == 0 && f2.intValue() == 90); 237 } 238 239 /** 240 * @tests java.lang.Float#isInfinite() 241 */ 242 public void test_isInfinite() { 243 // Test for method boolean java.lang.Float.isInfinite() 244 assertTrue("Infinity check failed", 245 (new Float(Float.POSITIVE_INFINITY).isInfinite() && new Float( 246 Float.NEGATIVE_INFINITY).isInfinite()) 247 && !(new Float(0.13131414f).isInfinite())); 248 } 249 250 /** 251 * @tests java.lang.Float#isInfinite(float) 252 */ 253 public void test_isInfiniteF() { 254 // Test for method boolean java.lang.Float.isInfinite(float) 255 256 assertTrue("Infinity check failed", Float.isInfinite(Float.POSITIVE_INFINITY) 257 && (Float.isInfinite(Float.NEGATIVE_INFINITY)) && !(Float.isInfinite(1.0f))); 258 } 259 260 /** 261 * @tests java.lang.Float#isNaN() 262 */ 263 public void test_isNaN() { 264 // Test for method boolean java.lang.Float.isNaN() 265 assertTrue("NAN check failed", new Float(Float.NaN).isNaN() 266 && !(new Float(1.0f).isNaN())); 267 } 268 269 /** 270 * @tests java.lang.Float#isNaN(float) 271 */ 272 public void test_isNaNF() { 273 // Test for method boolean java.lang.Float.isNaN(float) 274 assertTrue("NaN check failed", Float.isNaN(Float.NaN) && !(Float.isNaN(12.09f))); 275 } 276 277 /** 278 * @tests java.lang.Float#longValue() 279 */ 280 public void test_longValue() { 281 // Test for method long java.lang.Float.longValue() 282 Float f = new Float(0.46874f); 283 Float f2 = new Float(90.8f); 284 assertTrue("Returned incorrect long value", f.longValue() == 0 && f2.longValue() == 90); 285 } 286 287 /** 288 * @tests java.lang.Float#parseFloat(java.lang.String) 289 */ 290 public void test_parseFloatLjava_lang_String() { 291 assertEquals("Incorrect float returned, expected zero.", 0.0, Float 292 .parseFloat("7.0064923216240853546186479164495e-46"), 0.0); 293 assertEquals("Incorrect float returned, expected minimum float.", Float.MIN_VALUE, 294 Float.parseFloat("7.0064923216240853546186479164496e-46"), 0.0); 295 296 doTestCompareRawBits( 297 "0.000000000000000000000000000000000000011754942807573642917278829910357665133228589927589904276829631184250030649651730385585324256680905818939208984375", 298 0x800000, "1.17549435E-38"); 299 doTestCompareRawBits( 300 "0.00000000000000000000000000000000000001175494280757364291727882991035766513322858992758990427682963118425003064965173038558532425668090581893920898437499999f", 301 0x7fffff, "1.1754942E-38"); 302 303 /* Test a set of regular floats with exponents from -38 to +38 */ 304 for (int i = 38; i > 3; i--) { 305 String testString; 306 testString = "3.4028234663852886e-" + i; 307 doTestCompareRawBits(testString, rawBitsFor3_4eN38To38[38 - i], 308 expectedStringFor3_4eN38To38[38 - i]); 309 } 310 doTestCompareRawBits("3.4028234663852886e-3", rawBitsFor3_4eN38To38[38 - 3], 311 expectedStringFor3_4eN38To38[38 - 3]); 312 doTestCompareRawBits("3.4028234663852886e-2", rawBitsFor3_4eN38To38[38 - 2], 313 expectedStringFor3_4eN38To38[38 - 2]); 314 doTestCompareRawBits("3.4028234663852886e-1", rawBitsFor3_4eN38To38[38 - 1], 315 expectedStringFor3_4eN38To38[38 - 1]); 316 doTestCompareRawBits("3.4028234663852886e-0", rawBitsFor3_4eN38To38[38 - 0], 317 expectedStringFor3_4eN38To38[38 - 0]); 318 doTestCompareRawBits("3.4028234663852886e+1", rawBitsFor3_4eN38To38[38 + 1], 319 expectedStringFor3_4eN38To38[38 + 1]); 320 doTestCompareRawBits("3.4028234663852886e+2", rawBitsFor3_4eN38To38[38 + 2], 321 expectedStringFor3_4eN38To38[38 + 2]); 322 doTestCompareRawBits("3.4028234663852886e+3", rawBitsFor3_4eN38To38[38 + 3], 323 expectedStringFor3_4eN38To38[38 + 3]); 324 doTestCompareRawBits("3.4028234663852886e+4", rawBitsFor3_4eN38To38[38 + 4], 325 expectedStringFor3_4eN38To38[38 + 4]); 326 doTestCompareRawBits("3.4028234663852886e+5", rawBitsFor3_4eN38To38[38 + 5], 327 expectedStringFor3_4eN38To38[38 + 5]); 328 doTestCompareRawBits("3.4028234663852886e+6", rawBitsFor3_4eN38To38[38 + 6], 329 expectedStringFor3_4eN38To38[38 + 6]); 330 331 for (int i = 7; i < 39; i++) { 332 String testString; 333 testString = "3.4028234663852886e+" + i; 334 doTestCompareRawBits(testString, rawBitsFor3_4eN38To38[38 + i], 335 expectedStringFor3_4eN38To38[38 + i]); 336 } 337 338 /* Test another set of regular floats with exponents from -38 to +38 */ 339 for (int i = 38; i > 3; i--) { 340 String testString; 341 testString = "-1.1754943508222875e-" + i; 342 doTestCompareRawBits(testString, rawBitsFor1_17eN38To38[38 - i], 343 expectedStringFor1_17eN38To38[38 - i]); 344 } 345 doTestCompareRawBits("-1.1754943508222875e-3", rawBitsFor1_17eN38To38[38 - 3], 346 expectedStringFor1_17eN38To38[38 - 3]); 347 doTestCompareRawBits("-1.1754943508222875e-2", rawBitsFor1_17eN38To38[38 - 2], 348 expectedStringFor1_17eN38To38[38 - 2]); 349 doTestCompareRawBits("-1.1754943508222875e-1", rawBitsFor1_17eN38To38[38 - 1], 350 expectedStringFor1_17eN38To38[38 - 1]); 351 doTestCompareRawBits("-1.1754943508222875e-0", rawBitsFor1_17eN38To38[38 - 0], 352 expectedStringFor1_17eN38To38[38 - 0]); 353 doTestCompareRawBits("-1.1754943508222875e+1", rawBitsFor1_17eN38To38[38 + 1], 354 expectedStringFor1_17eN38To38[38 + 1]); 355 doTestCompareRawBits("-1.1754943508222875e+2", rawBitsFor1_17eN38To38[38 + 2], 356 expectedStringFor1_17eN38To38[38 + 2]); 357 doTestCompareRawBits("-1.1754943508222875e+3", rawBitsFor1_17eN38To38[38 + 3], 358 expectedStringFor1_17eN38To38[38 + 3]); 359 doTestCompareRawBits("-1.1754943508222875e+4", rawBitsFor1_17eN38To38[38 + 4], 360 expectedStringFor1_17eN38To38[38 + 4]); 361 doTestCompareRawBits("-1.1754943508222875e+5", rawBitsFor1_17eN38To38[38 + 5], 362 expectedStringFor1_17eN38To38[38 + 5]); 363 doTestCompareRawBits("-1.1754943508222875e+6", rawBitsFor1_17eN38To38[38 + 6], 364 expectedStringFor1_17eN38To38[38 + 6]); 365 366 for (int i = 7; i < 39; i++) { 367 String testString; 368 testString = "-1.1754943508222875e+" + i; 369 doTestCompareRawBits(testString, rawBitsFor1_17eN38To38[38 + i], 370 expectedStringFor1_17eN38To38[38 + i]); 371 } 372 373 /* Test denormalized floats (floats with exponents <= -38 */ 374 doTestCompareRawBits("1.1012984643248170E-45", 1, "1.4E-45"); 375 doTestCompareRawBits("-1.1012984643248170E-45", 0x80000001, "-1.4E-45"); 376 doTestCompareRawBits("1.0E-45", 1, "1.4E-45"); 377 doTestCompareRawBits("-1.0E-45", 0x80000001, "-1.4E-45"); 378 doTestCompareRawBits("0.9E-45", 1, "1.4E-45"); 379 doTestCompareRawBits("-0.9E-45", 0x80000001, "-1.4E-45"); 380 doTestCompareRawBits("4.203895392974451e-45", 3, "4.2E-45"); 381 doTestCompareRawBits("-4.203895392974451e-45", 0x80000003, "-4.2E-45"); 382 doTestCompareRawBits("0.004E-45", 0, "0.0"); 383 doTestCompareRawBits("-0.004E-45", 0x80000000, "-0.0"); 384 385 /* 386 * Test for large floats close to and greater than 3.4028235E38 and 387 * -3.4028235E38 388 */ 389 doTestCompareRawBits("1.2E+38", 0x7eb48e52, "1.2E38"); 390 doTestCompareRawBits("-1.2E+38", 0xfeb48e52, "-1.2E38"); 391 doTestCompareRawBits("3.2E+38", 0x7f70bdc2, "3.2E38"); 392 doTestCompareRawBits("-3.2E+38", 0xff70bdc2, "-3.2E38"); 393 doTestCompareRawBits("3.4E+38", 0x7f7fc99e, "3.4E38"); 394 doTestCompareRawBits("-3.4E+38", 0xff7fc99e, "-3.4E38"); 395 doTestCompareRawBits("3.4028234663852886E+38", 0x7f7fffff, "3.4028235E38"); 396 doTestCompareRawBits("-3.4028234663852886E+38", 0xff7fffff, "-3.4028235E38"); 397 doTestCompareRawBits("3.405E+38", 0x7f800000, "Infinity"); 398 doTestCompareRawBits("-3.405E+38", 0xff800000, "-Infinity"); 399 doTestCompareRawBits("3.41E+38", 0x7f800000, "Infinity"); 400 doTestCompareRawBits("-3.41E+38", 0xff800000, "-Infinity"); 401 doTestCompareRawBits("3.42E+38", 0x7f800000, "Infinity"); 402 doTestCompareRawBits("-3.42E+38", 0xff800000, "-Infinity"); 403 doTestCompareRawBits("1.0E+39", 0x7f800000, "Infinity"); 404 doTestCompareRawBits("-1.0E+39", 0xff800000, "-Infinity"); 405 } 406 407 /** 408 * @tests java.lang.Float#parseFloat(java.lang.String) 409 */ 410 public void test_parseFloat_LString_Unusual() { 411 float actual; 412 413 actual = Float.parseFloat("0x00000000000000000000000000000000000000000.0000000000000000000000000000000000000p0000000000000000000000000000000000"); 414 assertEquals("Returned incorrect value", 0.0f, actual, 0.0F); 415 416 actual = Float.parseFloat("+0Xfffff.fffffffffffffffffffffffffffffffp+99F"); 417 assertEquals("Returned incorrect value", 6.64614E35f, actual, 0.0F); 418 419 actual = Float.parseFloat("-0X.123456789abcdefp+99f"); 420 assertEquals("Returned incorrect value", -4.5072022E28f, actual, 0.0F); 421 422 actual = Float.parseFloat("-0X123456789abcdef.p+1f"); 423 assertEquals("Returned incorrect value", -1.63971062E17f, actual, 0.0F); 424 425 actual = Float.parseFloat("-0X000000000000000000000000000001abcdef.0000000000000000000000000001abefp00000000000000000000000000000000000000000004f"); 426 assertEquals("Returned incorrect value", -4.48585472E8f, actual, 0.0F); 427 428 actual = Float.parseFloat("0X0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001234p600f"); 429 assertEquals("Returned incorrect value", 5.907252E33f, actual, 0.0F); 430 431 actual = Float.parseFloat("0x1.p9223372036854775807"); 432 assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, actual, 0.0F); 433 434 actual = Float.parseFloat("0x1.p9223372036854775808"); 435 assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, actual, 0.0F); 436 437 actual = Float.parseFloat("0x10.p9223372036854775808"); 438 assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, actual, 0.0F); 439 440 actual = Float.parseFloat("0xabcd.ffffffffp+2000"); 441 assertEquals("Returned incorrect value", Float.POSITIVE_INFINITY, actual, 0.0F); 442 443 actual = Float.parseFloat("0x1.p-9223372036854775808"); 444 assertEquals("Returned incorrect value", 0.0f, actual, 0.0F); 445 446 actual = Float.parseFloat("0x1.p-9223372036854775809"); 447 assertEquals("Returned incorrect value", 0.0f, actual, 0.0F); 448 449 actual = Float.parseFloat("0x.1p-9223372036854775809"); 450 assertEquals("Returned incorrect value", 0.0f, actual, 0.0F); 451 } 452 453 /** 454 * @tests java.lang.Float#parseFloat(java.lang.String) 455 */ 456 public void test_parseFloat_LString_NormalPositiveExponent() { 457 int[] expecteds = { 458 0x3991a2b4, 0x43cc0247, 0x47909009, 459 0x4ac0c009, 0x4e109005, 0x5140c005, 460 0x5458d805, 0x57848402, 0x5a909002, 461 0x5da8a802, 0x60c0c002, 0x63cccc02, 462 0x66e4e402, 0x69f0f002, 0x6d048401, 463 0x70109001, 0x73169601, 0x76810810, 464 0x79840840, 0x7c8a08a0, 0x7f800000, 465 0x7f800000, 0x7f800000, 0x7f800000, 466 0x7f800000, 467 }; 468 469 for (int i = 0; i < expecteds.length; i++) { 470 int part = i * 6; 471 String inputString = "0x" + part + "." + part + "0123456789abcdefp" + part; 472 473 float actual = Float.parseFloat(inputString); 474 float expected = Float.intBitsToFloat(expecteds[i]); 475 476 String expectedString = Integer.toHexString(Float.floatToIntBits(expected)); 477 String actualString = Integer.toHexString(Float.floatToIntBits(actual)); 478 String errorMsg = i + "th input string is:<" + inputString 479 + ">.The expected result should be:<" + expectedString 480 + ">, but was: <" + actualString + ">. "; 481 482 assertEquals(errorMsg, expected, actual, 0.0F); 483 } 484 } 485 486 /** 487 * @tests java.lang.Float#parseFloat(java.lang.String) 488 */ 489 public void test_parseFloat_LString_NormalNegativeExponent() { 490 int[] expecteds = { 491 0x3991a2b4, 492 0x3d6e0247, 493 0x3aa0a009, 494 0x37848405, 495 0x3420a005, 496 0x30d4d405, 497 0x2d848402, 498 0x2a129202, 499 0x26acac02, 500 0x2346c602, 501 0x1fe0e002, 502 0x1c6eee02, 503 0x19048401, 504 0x15919101, 505 0x12189801, 506 0xf028828, 507 0xb890890, 508 0x80c88c8, 509 0x4930930, 510 0x1198998, 511 0x28028, 512 0x51c, 513 0xb, 514 0x0, 515 0x0, 516 }; 517 518 for (int i = 0; i < expecteds.length; i++) { 519 int part = i * 7; 520 String inputString = "0x" + part + "." + part + "0123456789abcdefp-" + part; 521 522 float actual = Float.parseFloat(inputString); 523 float expected = Float.intBitsToFloat(expecteds[i]); 524 525 String expectedString = Integer.toHexString(Float.floatToIntBits(expected)); 526 String actualString = Integer.toHexString(Float.floatToIntBits(actual)); 527 String errorMsg = i + "th input string is:<" + inputString 528 + ">.The expected result should be:<" + expectedString 529 + ">, but was: <" + actualString + ">. "; 530 531 assertEquals(errorMsg, expected, actual, 0.0F); 532 } 533 } 534 535 /** 536 * @tests java.lang.Float#parseFloat(java.lang.String) 537 */ 538 public void test_parseFloat_LString_MaxNormalBoundary() { 539 int[] expecteds ={ 540 0x7f7fffff, 541 0x7f7fffff, 542 0x7f7fffff, 543 0x7f800000, 544 0x7f800000, 545 0x7f800000, 546 547 0xff7fffff, 548 0xff7fffff, 549 0xff7fffff, 550 0xff800000, 551 0xff800000, 552 0xff800000, 553 }; 554 555 String[] inputs = { 556 "0x1.fffffep127", 557 "0x1.fffffe000000000000000000000000000000000000000000000001p127", 558 "0x1.fffffeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp127", 559 "0x1.ffffffp127", 560 "0x1.ffffff000000000000000000000000000000000000000000000001p127", 561 "0x1.ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp127", 562 563 "-0x1.fffffep127", 564 "-0x1.fffffe000000000000000000000000000000000000000000000001p127", 565 "-0x1.fffffeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp127", 566 "-0x1.ffffffp127", 567 "-0x1.ffffff000000000000000000000000000000000000000000000001p127", 568 "-0x1.ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp127", 569 }; 570 571 for (int i = 0; i < inputs.length; i++) { 572 float actual = Float.parseFloat(inputs[i]); 573 float expected = Float.intBitsToFloat(expecteds[i]); 574 575 String expectedString = Integer.toHexString(Float.floatToIntBits(expected)); 576 String actualString = Integer.toHexString(Float.floatToIntBits(actual)); 577 String errorMsg = i + "th input string is:<" + inputs[i] 578 + ">.The expected result should be:<" + expectedString 579 + ">, but was: <" + actualString + ">. "; 580 581 assertEquals(errorMsg, expected, actual, 0.0F); 582 } 583 } 584 585 /** 586 * @tests java.lang.Float#parseFloat(java.lang.String) 587 */ 588 public void test_parseFloat_LString_MinNormalBoundary() { 589 int expecteds[] = { 590 0x800000, 591 0x800000, 592 0x800000, 593 0x800000, 594 0x800001, 595 0x800001, 596 597 0x80800000, 598 0x80800000, 599 0x80800000, 600 0x80800000, 601 0x80800001, 602 0x80800001, 603 }; 604 605 String inputs[] = { 606 "0x1.0p-126", 607 "0x1.00000000000000000000000000000000000000000000001p-126", 608 "0x1.000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 609 "0x1.000001p-126", 610 "0x1.000001000000000000000000000000000000000000000001p-126", 611 "0x1.000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 612 613 "-0x1.0p-126", 614 "-0x1.00000000000000000000000000000000000000000000001p-126", 615 "-0x1.000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 616 "-0x1.000001p-126", 617 "-0x1.000001000000000000000000000000000000000000000001p-126", 618 "-0x1.000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 619 }; 620 621 for (int i = 0; i < inputs.length; i++) { 622 float actual = Float.parseFloat(inputs[i]); 623 float expected = Float.intBitsToFloat(expecteds[i]); 624 625 String expectedString = Integer.toHexString(Float.floatToIntBits(expected)); 626 String actualString = Integer.toHexString(Float.floatToIntBits(actual)); 627 String errorMsg = i + "th input string is:<" + inputs[i] 628 + ">.The expected result should be:<" + expectedString 629 + ">, but was: <" + actualString + ">. "; 630 631 assertEquals(errorMsg, expected, actual, 0.0F); 632 } 633 } 634 635 /** 636 * @tests java.lang.Float#parseFloat(java.lang.String) 637 */ 638 public void test_parseFloat_LString_MaxSubNormalBoundary() { 639 int expecteds[] = { 640 0x7fffff, 641 0x7fffff, 642 0x7fffff, 643 0x800000, 644 0x800000, 645 0x800000, 646 647 0x807fffff, 648 0x807fffff, 649 0x807fffff, 650 0x80800000, 651 0x80800000, 652 0x80800000, 653 }; 654 655 String inputs[] = { 656 "0x0.fffffep-126", 657 "0x0.fffffe000000000000000000000000000000000000000000000000000001p-126", 658 "0x0.fffffefffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 659 "0x0.ffffffp-126", 660 "0x0.ffffff0000000000000000000000000000000000000000000000000000001p-126", 661 "0x0.ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 662 663 "-0x0.fffffep-126", 664 "-0x0.fffffe000000000000000000000000000000000000000000000000000001p-126", 665 "-0x0.fffffefffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 666 "-0x0.ffffffp-126", 667 "-0x0.ffffff0000000000000000000000000000000000000000000000000000001p-126", 668 "-0x0.ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 669 }; 670 671 for (int i = 0; i < inputs.length; i++) { 672 float actual = Float.parseFloat(inputs[i]); 673 float expected = Float.intBitsToFloat(expecteds[i]); 674 675 String expectedString = Integer.toHexString(Float.floatToIntBits(expected)); 676 String actualString = Integer.toHexString(Float.floatToIntBits(actual)); 677 String errorMsg = i + "th input string is:<" + inputs[i] 678 + ">.The expected result should be:<" + expectedString 679 + ">, but was: <" + actualString + ">. "; 680 681 assertEquals(errorMsg, expected, actual, 0.0F); 682 } 683 } 684 685 /** 686 * @tests java.lang.Float#parseFloat(java.lang.String) 687 */ 688 public void test_parseFloat_LString_MinSubNormalBoundary() { 689 int expecteds[] = { 690 0x1, 691 0x1, 692 0x1, 693 0x2, 694 0x2, 695 0x2, 696 697 0x80000001, 698 0x80000001, 699 0x80000001, 700 0x80000002, 701 0x80000002, 702 0x80000002, 703 }; 704 705 String inputs[] = { 706 "0x0.000002p-126", 707 "0x0.00000200000000000000000000000000000000000001p-126", 708 "0x0.000002ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 709 "0x0.000003p-126", 710 "0x0.000003000000000000000000000000000000000000001p-126", 711 "0x0.000003ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 712 713 "-0x0.000002p-126", 714 "-0x0.00000200000000000000000000000000000000000001p-126", 715 "-0x0.000002ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 716 "-0x0.000003p-126", 717 "-0x0.000003000000000000000000000000000000000000001p-126", 718 "-0x0.000003ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 719 }; 720 721 for (int i = 0; i < inputs.length; i++) { 722 float actual = Float.parseFloat(inputs[i]); 723 float expected = Float.intBitsToFloat(expecteds[i]); 724 725 String expectedString = Integer.toHexString(Float.floatToIntBits(expected)); 726 String actualString = Integer.toHexString(Float.floatToIntBits(actual)); 727 String errorMsg = i + "th input string is:<" + inputs[i] 728 + ">.The expected result should be:<" + expectedString 729 + ">, but was: <" + actualString + ">. "; 730 731 assertEquals(errorMsg, expected, actual, 0.0F); 732 } 733 } 734 735 /** 736 * @tests java.lang.Float#parseFloat(java.lang.String) 737 */ 738 public void test_parseFloat_LString_ZeroBoundary() { 739 int expecteds[] = { 740 0x0, 741 0x0, 742 0x0, 743 0x0, 744 0x1, 745 0x1, 746 747 0x80000000, 748 0x80000000, 749 0x80000000, 750 0x80000000, 751 0x80000001, 752 0x80000001, 753 }; 754 755 String inputs[] = { 756 "0x0.000000000000000p-126", 757 "0x0.000000000000000000000000000000000000000000000001p-126", 758 "0x0.000000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 759 "0x0.000001p-126", 760 "0x0.000001000000000000000000000000000000000000000001p-126", 761 "0x0.000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 762 763 "-0x0.000000000000000p-126", 764 "-0x0.000000000000000000000000000000000000000000000001p-126", 765 "-0x0.000000fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 766 "-0x0.000001p-126", 767 "-0x0.000001000000000000000000000000000000000000000001p-126", 768 "-0x0.000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffp-126", 769 }; 770 771 for (int i = 0; i < inputs.length; i++) { 772 float actual = Float.parseFloat(inputs[i]); 773 float expected = Float.intBitsToFloat(expecteds[i]); 774 775 String expectedString = Integer.toHexString(Float.floatToIntBits(expected)); 776 String actualString = Integer.toHexString(Float.floatToIntBits(actual)); 777 String errorMsg = i + "th input string is:<" + inputs[i] 778 + ">.The expected result should be:<" + expectedString 779 + ">, but was: <" + actualString + ">. "; 780 781 assertEquals(errorMsg, expected, actual, 0.0F); 782 } 783 } 784 785 /** 786 * @tests java.lang.Float#parseFloat(java.lang.String) 787 */ 788 public void test_parseFloat_LString_Harmony6261() { 789 // Regression test for HARMONY-6261 790 float f = new Float("2147483648"); 791 assertEquals("2.1474836E9", Float.toString(f)); 792 793 doTestCompareRawBits("123456790528.000000000000000f", 0x51e5f4c9, "1.2345679E11"); 794 doTestCompareRawBits("8589934592", 0x50000000, "8.5899346E9"); 795 doTestCompareRawBits("8606711808", 0x50004000, "8.606712E9"); 796 } 797 798 /** 799 * @tests java.lang.Float#shortValue() 800 */ 801 public void test_shortValue() { 802 // Test for method short java.lang.Float.shortValue() 803 Float f = new Float(0.46874f); 804 Float f2 = new Float(90.8f); 805 assertTrue("Returned incorrect short value", f.shortValue() == 0 806 && f2.shortValue() == 90); 807 } 808 809 /** 810 * @tests java.lang.Float#toString() 811 */ 812 public void test_toString() { 813 // Test for method java.lang.String java.lang.Float.toString() 814 815 test_toString(12.90898f, "12.90898"); 816 817 test_toString(1.7014118346046924e+38F, "1.7014118E38"); 818 819 test_toString(1E19F, "1.0E19"); 820 821 test_toString(1E-36F, "1.0E-36"); 822 823 test_toString(1.0E-38F, "1.0E-38"); 824 } 825 826 /** 827 * @tests java.lang.Float#toString(float) 828 */ 829 public void test_toStringF() { 830 // Test for method java.lang.String java.lang.Float.toString(float) 831 832 float ff; 833 String answer; 834 835 ff = 12.90898f; 836 answer = "12.90898"; 837 assertTrue("Incorrect String representation want " + answer + ", got " 838 + Float.toString(ff), Float.toString(ff).equals(answer)); 839 840 ff = Float.MAX_VALUE; 841 answer = "3.4028235E38"; 842 assertTrue("Incorrect String representation want " + answer + ", got " 843 + Float.toString(ff), Float.toString(ff).equals(answer)); 844 } 845 846 /** 847 * @tests java.lang.Float#valueOf(java.lang.String) 848 */ 849 public void test_valueOfLjava_lang_String() { 850 // Test for method java.lang.Float 851 // java.lang.Float.valueOf(java.lang.String) 852 853 Float wanted = new Float(432.1235f); 854 Float got = Float.valueOf("432.1235"); 855 assertTrue("Incorrect float returned--wanted: " + wanted + " but got: " + got, got 856 .equals(wanted)); 857 858 wanted = new Float(0f); 859 got = Float.valueOf("0"); 860 assertTrue("Incorrect float returned--wanted: " + wanted + " but got: " + got, got 861 .equals(wanted)); 862 863 wanted = new Float(-1212.3232f); 864 got = Float.valueOf("-1212.3232"); 865 assertTrue("Incorrect float returned--wanted: " + wanted + " but got: " + got, got 866 .equals(wanted)); 867 868 try { 869 Float.valueOf(null); 870 fail("Expected Float.valueOf(null) to throw NPE."); 871 } catch (NullPointerException ex) { 872 // expected 873 } 874 875 try { 876 Float.valueOf(""); 877 fail("Expected Float.valueOf(\"\") to throw NFE"); 878 } catch (NumberFormatException e) { 879 // expected 880 } 881 882 Float posZero = Float.valueOf("+0.0"); 883 Float negZero = Float.valueOf("-0.0"); 884 assertFalse("Floattest0", posZero.equals(negZero)); 885 assertTrue("Floattest1", 0.0f == -0.0f); 886 887 // Tests for float values by name. 888 Float expectedNaN = new Float(Float.NaN); 889 890 Float posNaN = Float.valueOf("NaN"); 891 assertTrue("Floattest2", posNaN.equals(expectedNaN)); 892 893 Float posNaNSigned = Float.valueOf("+NaN"); 894 assertTrue("Floattest3", posNaNSigned.equals(expectedNaN)); 895 896 Float negNaNSigned = Float.valueOf("-NaN"); 897 assertTrue("Floattest4", negNaNSigned.equals(expectedNaN)); 898 899 Float posInfinite = Float.valueOf("Infinity"); 900 assertTrue("Floattest5", posInfinite.equals(new Float(Float.POSITIVE_INFINITY))); 901 902 Float posInfiniteSigned = Float.valueOf("+Infinity"); 903 assertTrue("Floattest6", posInfiniteSigned.equals(new Float(Float.POSITIVE_INFINITY))); 904 905 Float negInfiniteSigned = Float.valueOf("-Infinity"); 906 assertTrue("Floattest7", negInfiniteSigned.equals(new Float(Float.NEGATIVE_INFINITY))); 907 908 // test HARMONY-6641 909 posInfinite = Float.valueOf("320.0E+2147483647"); 910 assertEquals("Floattest8", Float.POSITIVE_INFINITY, posInfinite); 911 912 negZero = Float.valueOf("-1.4E-2147483314"); 913 assertEquals("Floattest9", -0.0f, negZero); 914 } 915 916 private void test_toString(float ff, String answer) { 917 // Test for method java.lang.String java.lang.Double.toString(double) 918 assertTrue("Incorrect String representation want " + answer + ", got (" 919 + Float.toString(ff) + ")", Float.toString(ff).equals(answer)); 920 Float f = new Float(ff); 921 assertTrue("Incorrect String representation want " + answer + ", got (" 922 + Float.toString(f.floatValue()) + ")", Float.toString(f.floatValue()).equals( 923 answer)); 924 assertTrue("Incorrect String representation want " + answer + ", got (" + f.toString() 925 + ")", f.toString().equals(answer)); 926 } 927 928 /** 929 * @tests java.lang.Float#compareTo(java.lang.Float) 930 * @tests java.lang.Float#compare(float, float) 931 */ 932 public void test_compareToLjava_lang_Float() { 933 // A selection of float values in ascending order. 934 float[] values = new float[] { Float.NEGATIVE_INFINITY, -Float.MAX_VALUE, -2f, 935 -Float.MIN_VALUE, -0f, 0f, Float.MIN_VALUE, 2f, Float.MAX_VALUE, 936 Float.POSITIVE_INFINITY, Float.NaN }; 937 938 for (int i = 0; i < values.length; i++) { 939 float f1 = values[i]; 940 941 // Test that each value compares equal to itself; and each object is 942 // equal to another object 943 // like itself 944 assertTrue("Assert 0: compare() should be equal: " + f1, Float.compare(f1, f1) == 0); 945 Float objFloat = new Float(f1); 946 assertTrue("Assert 1: compareTo() should be equal: " + objFloat, objFloat 947 .compareTo(objFloat) == 0); 948 949 // Test that the Float-defined order is respected 950 for (int j = i + 1; j < values.length; j++) { 951 float f2 = values[j]; 952 assertTrue("Assert 2: compare() " + f1 + " should be less " + f2, Float 953 .compare(f1, f2) == -1); 954 assertTrue("Assert 3: compare() " + f2 + " should be greater " + f1, Float 955 .compare(f2, f1) == 1); 956 957 Float F2 = new Float(f2); 958 assertTrue("Assert 4: compareTo() " + f1 + " should be less " + f2, objFloat 959 .compareTo(F2) == -1); 960 assertTrue("Assert 5: compareTo() " + f2 + " should be greater " + f1, F2 961 .compareTo(objFloat) == 1); 962 } 963 } 964 } 965 966 /** 967 * @tests java.lang.Float#equals(java.lang.Object) 968 */ 969 public void test_equalsLjava_lang_Object() { 970 Float f1 = new Float(8765.4321f); 971 Float f2 = new Float(8765.4321f); 972 Float f3 = new Float(-1.0f); 973 assertTrue("Assert 0: Equality test failed", f1.equals(f2) && !(f1.equals(f3))); 974 975 assertTrue("Assert 1: NaN should not be == Nan", Float.NaN != Float.NaN); 976 assertTrue("Assert 2: NaN should not be == Nan", new Float(Float.NaN).equals(new Float( 977 Float.NaN))); 978 assertTrue("Assert 3: -0f should be == 0f", 0f == -0f); 979 assertTrue("Assert 4: -0f should not be equals() 0f", !new Float(0f).equals(new Float( 980 -0f))); 981 982 f1 = new Float(1098.576f); 983 f2 = new Float(1098.576f); 984 f3 = new Float(1.0f); 985 assertTrue("Equality test failed", f1.equals(f2) && !(f1.equals(f3))); 986 987 assertTrue("NaN should not be == Nan", Float.NaN != Float.NaN); 988 assertTrue("NaN should not be == Nan", new Float(Float.NaN) 989 .equals(new Float(Float.NaN))); 990 assertTrue("-0f should be == 0f", 0f == -0f); 991 assertTrue("-0f should not be equals() 0f", !new Float(0f).equals(new Float(-0f))); 992 } 993 994 /** 995 * @tests java.lang.Float#toHexString(float) 996 */ 997 public void test_toHexStringF() { 998 // the follow values comes from the Float Javadoc/Spec 999 assertEquals("0x0.0p0", Float.toHexString(0.0F)); 1000 assertEquals("-0x0.0p0", Float.toHexString(-0.0F)); 1001 assertEquals("0x1.0p0", Float.toHexString(1.0F)); 1002 assertEquals("-0x1.0p0", Float.toHexString(-1.0F)); 1003 assertEquals("0x1.0p1", Float.toHexString(2.0F)); 1004 assertEquals("0x1.8p1", Float.toHexString(3.0F)); 1005 assertEquals("0x1.0p-1", Float.toHexString(0.5F)); 1006 assertEquals("0x1.0p-2", Float.toHexString(0.25F)); 1007 assertEquals("0x1.fffffep127", Float.toHexString(Float.MAX_VALUE)); 1008 assertEquals("0x0.000002p-126", Float.toHexString(Float.MIN_VALUE)); 1009 1010 // test edge cases 1011 assertEquals("NaN", Float.toHexString(Float.NaN)); 1012 assertEquals("-Infinity", Float.toHexString(Float.NEGATIVE_INFINITY)); 1013 assertEquals("Infinity", Float.toHexString(Float.POSITIVE_INFINITY)); 1014 1015 // test various numbers 1016 assertEquals("-0x1.da8p6", Float.toHexString(-118.625F)); 1017 assertEquals("0x1.295788p23", Float.toHexString(9743299.65F)); 1018 assertEquals("0x1.295788p23", Float.toHexString(9743299.65000F)); 1019 assertEquals("0x1.295788p23", Float.toHexString(9743299.650001234F)); 1020 assertEquals("0x1.700d1p33", Float.toHexString(12349743299.65000F)); 1021 1022 // test HARMONY-2132 1023 assertEquals("0x1.01p10", Float.toHexString(0x1.01p10f)); 1024 } 1025 1026 /** 1027 * @tests java.lang.Float#valueOf(float) 1028 */ 1029 public void test_valueOfF() { 1030 assertEquals(new Float(Float.MIN_VALUE), Float.valueOf(Float.MIN_VALUE)); 1031 assertEquals(new Float(Float.MAX_VALUE), Float.valueOf(Float.MAX_VALUE)); 1032 assertEquals(new Float(0), Float.valueOf(0)); 1033 1034 int s = -128; 1035 while (s < 128) { 1036 assertEquals(new Float(s), Float.valueOf(s)); 1037 assertEquals(new Float(s + 0.1F), Float.valueOf(s + 0.1F)); 1038 assertEquals(Float.valueOf(s + 0.1F), Float.valueOf(s + 0.1F)); 1039 s++; 1040 } 1041 } 1042 1043 /** 1044 * @tests {@link java.lang.Float#MAX_EXPONENT} 1045 * @since 1.6 1046 */ 1047 public void test_MAX_EXPONENT() { 1048 assertTrue("Wrong value of java.lang.Float.MAX_EXPONENT", 1049 Float.MAX_EXPONENT == 127); 1050 assertTrue("Wrong value of java.lang.Float.MAX_EXPONENT", 1051 Float.MAX_EXPONENT == Math.getExponent(Float.MAX_VALUE)); 1052 } 1053 1054 /** 1055 * @tests {@link java.lang.Float#MIN_EXPONENT} 1056 * @since 1.6 1057 */ 1058 public void test_MIN_EXPONENT() { 1059 assertTrue("Wrong value of java.lang.Float.MIN_EXPONENT", 1060 Float.MIN_EXPONENT == -126); 1061 assertTrue("Wrong value of java.lang.Float.MIN_EXPONENT", 1062 Float.MIN_EXPONENT == Math.getExponent(Float.MIN_NORMAL)); 1063 } 1064 1065 /** 1066 * @tests {@link java.lang.Float#MIN_NORMAL} 1067 * @since 1.6 1068 */ 1069 public void test_MIN_NORMAL() { 1070 assertTrue("Wrong value of java.lang.Float.MIN_NORMAL", 1071 Float.MIN_NORMAL == 0x1.0p-126f); 1072 assertTrue("Wrong value of java.lang.Float.MIN_NORMAL", 1073 Float.MIN_NORMAL == Float.intBitsToFloat(0x00800000)); 1074 assertTrue("Wrong value of java.lang.Float.MIN_NORMAL", 1075 Float.MIN_NORMAL == 1.1754943508222875E-38f); 1076 } 1077 } 1078
