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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package libcore.java.lang;
public class FloatTest extends junit.framework.TestCase {
// Needed to prevent testVerifierTyping from statically resolving the if statement.
static boolean testVerifierTypingBool = false;
public void test_valueOf_String1() throws Exception {
// This threw OutOfMemoryException.
// http://code.google.com/p/android/issues/detail?id=4185
assertEquals(2358.166016f, Float.valueOf("2358.166016"));
}
public void test_valueOf_String2() throws Exception {
// This threw OutOfMemoryException.
// http://code.google.com/p/android/issues/detail?id=3156
assertEquals(-2.14748365E9f, Float.valueOf(String.valueOf(Integer.MIN_VALUE)));
}
public void testNamedFloats() throws Exception {
assertEquals(Float.NaN, Float.parseFloat("NaN"));
assertEquals(Float.NaN, Float.parseFloat("-NaN"));
assertEquals(Float.NaN, Float.parseFloat("+NaN"));
try {
Float.parseFloat("NNaN");
fail();
} catch (NumberFormatException expected) {
}
try {
Float.parseFloat("NaNN");
fail();
} catch (NumberFormatException expected) {
}
assertEquals(Float.POSITIVE_INFINITY, Float.parseFloat("+Infinity"));
assertEquals(Float.POSITIVE_INFINITY, Float.parseFloat("Infinity"));
assertEquals(Float.NEGATIVE_INFINITY, Float.parseFloat("-Infinity"));
try {
Float.parseFloat("IInfinity");
fail();
} catch (NumberFormatException expected) {
}
try {
Float.parseFloat("Infinityy");
fail();
} catch (NumberFormatException expected) {
}
}
public void testSuffixParsing() throws Exception {
String[] badStrings = { "1ff", "1fd", "1df", "1dd" };
for (String string : badStrings) {
try {
Float.parseFloat(string);
fail(string);
} catch (NumberFormatException expected) {
}
}
assertEquals(1.0f, Float.parseFloat("1f"));
assertEquals(1.0f, Float.parseFloat("1d"));
assertEquals(1.0f, Float.parseFloat("1F"));
assertEquals(1.0f, Float.parseFloat("1D"));
assertEquals(1.0f, Float.parseFloat("1.D"));
assertEquals(1.0f, Float.parseFloat("1.E0D"));
assertEquals(1.0f, Float.parseFloat(".1E1D"));
}
public void testExponentParsing() throws Exception {
String[] strings = {
// Exponents missing integer values.
"1.0e", "1.0e+", "1.0e-",
// Exponents with too many explicit signs.
"1.0e++1", "1.0e+-1", "1.0e-+1", "1.0e--1"
};
for (String string : strings) {
try {
Float.parseFloat(string);
fail(string);
} catch (NumberFormatException expected) {
}
}
assertEquals(1.0e-45f, Float.parseFloat("1.0e-45"));
assertEquals(0.0f, Float.parseFloat("1.0e-46"));
assertEquals(-1.0e-45f, Float.parseFloat("-1.0e-45"));
assertEquals(-0.0f, Float.parseFloat("-1.0e-46"));
assertEquals(1.0e+38f, Float.parseFloat("1.0e+38"));
assertEquals(Float.POSITIVE_INFINITY, Float.parseFloat("1.0e+39"));
assertEquals(-1.0e+38f, Float.parseFloat("-1.0e+38"));
assertEquals(Float.NEGATIVE_INFINITY, Float.parseFloat("-1.0e+39"));
assertEquals(Float.POSITIVE_INFINITY, Float.parseFloat("1.0e+9999999999"));
assertEquals(Float.NEGATIVE_INFINITY, Float.parseFloat("-1.0e+9999999999"));
assertEquals(0.0f, Float.parseFloat("1.0e-9999999999"));
assertEquals(-0.0f, Float.parseFloat("-1.0e-9999999999"));
assertEquals(Float.POSITIVE_INFINITY, Float.parseFloat("320.0E+2147483647"));
assertEquals(-0.0f, Float.parseFloat("-1.4E-2147483314"));
}
public void testVerifierTyping() throws Exception {
float f1 = 0;
if (testVerifierTypingBool) {
f1 = Float.MIN_VALUE;
}
assertEquals(f1, 0f);
}
// Float equivalent of testParseLargestSubnormalDoublePrecision. http://b/18087920.
public void testParseLargestSubnormalFloatPrecision() {
// These are different ways of saying MIN_NORMAL.
assertEquals(1.1754943508222875e-38f, Float.parseFloat("1.1754943508222875e-38"));
assertEquals(1.1754943508222875e-38f, Float.parseFloat("0.00011754943508222875e-34f"));
assertEquals(1.1754943508222875e-38f, Float.parseFloat("00000001.1754943508222875e-38f"));
assertEquals(1.1754943508222875e-38f, Float.parseFloat("1.17549435082228750000e-38f"));
assertEquals(1.1754943508222875e-38f, Float.parseFloat("1.1754943508222875e-0038f"));
assertEquals(-1.1754943508222875e-38f, Float.parseFloat("-1.1754943508222875e-38f"));
// Extra interesting values suggested as part of http://b/18087920.
assertEquals(1.1754944e-38f, Float.parseFloat("11754942807573643E-54"));
assertEquals(1.1754944e-38f, Float.parseFloat("11754942807573644E-54"));
assertEquals(1.1754944e-38f, Float.parseFloat("11754942807573645E-54"));
}
}
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