| /* |
| * Copyright (C) 2008 The Guava Authors |
| * |
| * 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 com.google.common.primitives; |
| |
| import static java.lang.Long.MAX_VALUE; |
| import static java.lang.Long.MIN_VALUE; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.annotations.GwtIncompatible; |
| import com.google.common.base.Converter; |
| import com.google.common.collect.testing.Helpers; |
| import com.google.common.testing.NullPointerTester; |
| import com.google.common.testing.SerializableTester; |
| import java.math.BigInteger; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.Random; |
| import junit.framework.TestCase; |
| |
| /** |
| * Unit test for {@link Longs}. |
| * |
| * @author Kevin Bourrillion |
| */ |
| @GwtCompatible(emulated = true) |
| @SuppressWarnings("cast") // redundant casts are intentional and harmless |
| public class LongsTest extends TestCase { |
| private static final long[] EMPTY = {}; |
| private static final long[] ARRAY1 = {(long) 1}; |
| private static final long[] ARRAY234 = {(long) 2, (long) 3, (long) 4}; |
| |
| private static final long[] VALUES = {MIN_VALUE, (long) -1, (long) 0, (long) 1, MAX_VALUE}; |
| |
| @GwtIncompatible // Long.hashCode returns different values in GWT. |
| public void testHashCode() { |
| for (long value : VALUES) { |
| assertEquals("hashCode for " + value, ((Long) value).hashCode(), Longs.hashCode(value)); |
| } |
| } |
| |
| public void testCompare() { |
| for (long x : VALUES) { |
| for (long y : VALUES) { |
| // note: spec requires only that the sign is the same |
| assertEquals(x + ", " + y, Long.valueOf(x).compareTo(y), Longs.compare(x, y)); |
| } |
| } |
| } |
| |
| public void testContains() { |
| assertFalse(Longs.contains(EMPTY, (long) 1)); |
| assertFalse(Longs.contains(ARRAY1, (long) 2)); |
| assertFalse(Longs.contains(ARRAY234, (long) 1)); |
| assertTrue(Longs.contains(new long[] {(long) -1}, (long) -1)); |
| assertTrue(Longs.contains(ARRAY234, (long) 2)); |
| assertTrue(Longs.contains(ARRAY234, (long) 3)); |
| assertTrue(Longs.contains(ARRAY234, (long) 4)); |
| } |
| |
| public void testIndexOf() { |
| assertEquals(-1, Longs.indexOf(EMPTY, (long) 1)); |
| assertEquals(-1, Longs.indexOf(ARRAY1, (long) 2)); |
| assertEquals(-1, Longs.indexOf(ARRAY234, (long) 1)); |
| assertEquals(0, Longs.indexOf(new long[] {(long) -1}, (long) -1)); |
| assertEquals(0, Longs.indexOf(ARRAY234, (long) 2)); |
| assertEquals(1, Longs.indexOf(ARRAY234, (long) 3)); |
| assertEquals(2, Longs.indexOf(ARRAY234, (long) 4)); |
| assertEquals(1, Longs.indexOf(new long[] {(long) 2, (long) 3, (long) 2, (long) 3}, (long) 3)); |
| } |
| |
| public void testIndexOf_arrayTarget() { |
| assertEquals(0, Longs.indexOf(EMPTY, EMPTY)); |
| assertEquals(0, Longs.indexOf(ARRAY234, EMPTY)); |
| assertEquals(-1, Longs.indexOf(EMPTY, ARRAY234)); |
| assertEquals(-1, Longs.indexOf(ARRAY234, ARRAY1)); |
| assertEquals(-1, Longs.indexOf(ARRAY1, ARRAY234)); |
| assertEquals(0, Longs.indexOf(ARRAY1, ARRAY1)); |
| assertEquals(0, Longs.indexOf(ARRAY234, ARRAY234)); |
| assertEquals(0, Longs.indexOf(ARRAY234, new long[] {(long) 2, (long) 3})); |
| assertEquals(1, Longs.indexOf(ARRAY234, new long[] {(long) 3, (long) 4})); |
| assertEquals(1, Longs.indexOf(ARRAY234, new long[] {(long) 3})); |
| assertEquals(2, Longs.indexOf(ARRAY234, new long[] {(long) 4})); |
| assertEquals( |
| 1, |
| Longs.indexOf( |
| new long[] {(long) 2, (long) 3, (long) 3, (long) 3, (long) 3}, new long[] {(long) 3})); |
| assertEquals( |
| 2, |
| Longs.indexOf( |
| new long[] {(long) 2, (long) 3, (long) 2, (long) 3, (long) 4, (long) 2, (long) 3}, |
| new long[] {(long) 2, (long) 3, (long) 4})); |
| assertEquals( |
| 1, |
| Longs.indexOf( |
| new long[] {(long) 2, (long) 2, (long) 3, (long) 4, (long) 2, (long) 3, (long) 4}, |
| new long[] {(long) 2, (long) 3, (long) 4})); |
| assertEquals( |
| -1, |
| Longs.indexOf( |
| new long[] {(long) 4, (long) 3, (long) 2}, new long[] {(long) 2, (long) 3, (long) 4})); |
| } |
| |
| public void testLastIndexOf() { |
| assertEquals(-1, Longs.lastIndexOf(EMPTY, (long) 1)); |
| assertEquals(-1, Longs.lastIndexOf(ARRAY1, (long) 2)); |
| assertEquals(-1, Longs.lastIndexOf(ARRAY234, (long) 1)); |
| assertEquals(0, Longs.lastIndexOf(new long[] {(long) -1}, (long) -1)); |
| assertEquals(0, Longs.lastIndexOf(ARRAY234, (long) 2)); |
| assertEquals(1, Longs.lastIndexOf(ARRAY234, (long) 3)); |
| assertEquals(2, Longs.lastIndexOf(ARRAY234, (long) 4)); |
| assertEquals( |
| 3, Longs.lastIndexOf(new long[] {(long) 2, (long) 3, (long) 2, (long) 3}, (long) 3)); |
| } |
| |
| public void testMax_noArgs() { |
| try { |
| Longs.max(); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testMax() { |
| assertEquals(MIN_VALUE, Longs.max(MIN_VALUE)); |
| assertEquals(MAX_VALUE, Longs.max(MAX_VALUE)); |
| assertEquals( |
| (long) 9, Longs.max((long) 8, (long) 6, (long) 7, (long) 5, (long) 3, (long) 0, (long) 9)); |
| } |
| |
| public void testMin_noArgs() { |
| try { |
| Longs.min(); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testMin() { |
| assertEquals(MIN_VALUE, Longs.min(MIN_VALUE)); |
| assertEquals(MAX_VALUE, Longs.min(MAX_VALUE)); |
| assertEquals( |
| (long) 0, Longs.min((long) 8, (long) 6, (long) 7, (long) 5, (long) 3, (long) 0, (long) 9)); |
| } |
| |
| public void testConstrainToRange() { |
| assertEquals((long) 1, Longs.constrainToRange((long) 1, (long) 0, (long) 5)); |
| assertEquals((long) 1, Longs.constrainToRange((long) 1, (long) 1, (long) 5)); |
| assertEquals((long) 3, Longs.constrainToRange((long) 1, (long) 3, (long) 5)); |
| assertEquals((long) -1, Longs.constrainToRange((long) 0, (long) -5, (long) -1)); |
| assertEquals((long) 2, Longs.constrainToRange((long) 5, (long) 2, (long) 2)); |
| try { |
| Longs.constrainToRange((long) 1, (long) 3, (long) 2); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testConcat() { |
| assertTrue(Arrays.equals(EMPTY, Longs.concat())); |
| assertTrue(Arrays.equals(EMPTY, Longs.concat(EMPTY))); |
| assertTrue(Arrays.equals(EMPTY, Longs.concat(EMPTY, EMPTY, EMPTY))); |
| assertTrue(Arrays.equals(ARRAY1, Longs.concat(ARRAY1))); |
| assertNotSame(ARRAY1, Longs.concat(ARRAY1)); |
| assertTrue(Arrays.equals(ARRAY1, Longs.concat(EMPTY, ARRAY1, EMPTY))); |
| assertTrue( |
| Arrays.equals( |
| new long[] {(long) 1, (long) 1, (long) 1}, Longs.concat(ARRAY1, ARRAY1, ARRAY1))); |
| assertTrue( |
| Arrays.equals( |
| new long[] {(long) 1, (long) 2, (long) 3, (long) 4}, Longs.concat(ARRAY1, ARRAY234))); |
| } |
| |
| private static void assertByteArrayEquals(byte[] expected, byte[] actual) { |
| assertTrue( |
| "Expected: " + Arrays.toString(expected) + ", but got: " + Arrays.toString(actual), |
| Arrays.equals(expected, actual)); |
| } |
| |
| public void testToByteArray() { |
| assertByteArrayEquals( |
| new byte[] {0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19}, |
| Longs.toByteArray(0x1213141516171819L)); |
| assertByteArrayEquals( |
| new byte[] { |
| (byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC, |
| (byte) 0xBB, (byte) 0xAA, (byte) 0x99, (byte) 0x88 |
| }, |
| Longs.toByteArray(0xFFEEDDCCBBAA9988L)); |
| } |
| |
| public void testFromByteArray() { |
| assertEquals( |
| 0x1213141516171819L, |
| Longs.fromByteArray(new byte[] {0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x33})); |
| assertEquals( |
| 0xFFEEDDCCBBAA9988L, |
| Longs.fromByteArray( |
| new byte[] { |
| (byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC, |
| (byte) 0xBB, (byte) 0xAA, (byte) 0x99, (byte) 0x88 |
| })); |
| } |
| |
| public void testFromByteArrayFails() { |
| try { |
| Longs.fromByteArray(new byte[Longs.BYTES - 1]); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testFromBytes() { |
| assertEquals( |
| 0x1213141516171819L, |
| Longs.fromBytes( |
| (byte) 0x12, |
| (byte) 0x13, |
| (byte) 0x14, |
| (byte) 0x15, |
| (byte) 0x16, |
| (byte) 0x17, |
| (byte) 0x18, |
| (byte) 0x19)); |
| assertEquals( |
| 0xFFEEDDCCBBAA9988L, |
| Longs.fromBytes( |
| (byte) 0xFF, |
| (byte) 0xEE, |
| (byte) 0xDD, |
| (byte) 0xCC, |
| (byte) 0xBB, |
| (byte) 0xAA, |
| (byte) 0x99, |
| (byte) 0x88)); |
| } |
| |
| public void testByteArrayRoundTrips() { |
| Random r = new Random(5); |
| byte[] b = new byte[Longs.BYTES]; |
| |
| for (int i = 0; i < 1000; i++) { |
| long num = r.nextLong(); |
| assertEquals(num, Longs.fromByteArray(Longs.toByteArray(num))); |
| |
| r.nextBytes(b); |
| long value = Longs.fromByteArray(b); |
| assertTrue("" + value, Arrays.equals(b, Longs.toByteArray(value))); |
| } |
| } |
| |
| public void testEnsureCapacity() { |
| assertSame(EMPTY, Longs.ensureCapacity(EMPTY, 0, 1)); |
| assertSame(ARRAY1, Longs.ensureCapacity(ARRAY1, 0, 1)); |
| assertSame(ARRAY1, Longs.ensureCapacity(ARRAY1, 1, 1)); |
| assertTrue( |
| Arrays.equals( |
| new long[] {(long) 1, (long) 0, (long) 0}, Longs.ensureCapacity(ARRAY1, 2, 1))); |
| } |
| |
| public void testEnsureCapacity_fail() { |
| try { |
| Longs.ensureCapacity(ARRAY1, -1, 1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| try { |
| // notice that this should even fail when no growth was needed |
| Longs.ensureCapacity(ARRAY1, 1, -1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testJoin() { |
| assertEquals("", Longs.join(",", EMPTY)); |
| assertEquals("1", Longs.join(",", ARRAY1)); |
| assertEquals("1,2", Longs.join(",", (long) 1, (long) 2)); |
| assertEquals("123", Longs.join("", (long) 1, (long) 2, (long) 3)); |
| } |
| |
| public void testLexicographicalComparator() { |
| List<long[]> ordered = |
| Arrays.asList( |
| new long[] {}, |
| new long[] {MIN_VALUE}, |
| new long[] {MIN_VALUE, MIN_VALUE}, |
| new long[] {MIN_VALUE, (long) 1}, |
| new long[] {(long) 1}, |
| new long[] {(long) 1, MIN_VALUE}, |
| new long[] {MAX_VALUE, MAX_VALUE - (long) 1}, |
| new long[] {MAX_VALUE, MAX_VALUE}, |
| new long[] {MAX_VALUE, MAX_VALUE, MAX_VALUE}); |
| |
| Comparator<long[]> comparator = Longs.lexicographicalComparator(); |
| Helpers.testComparator(comparator, ordered); |
| } |
| |
| @GwtIncompatible // SerializableTester |
| public void testLexicographicalComparatorSerializable() { |
| Comparator<long[]> comparator = Longs.lexicographicalComparator(); |
| assertSame(comparator, SerializableTester.reserialize(comparator)); |
| } |
| |
| public void testReverse() { |
| testReverse(new long[] {}, new long[] {}); |
| testReverse(new long[] {1}, new long[] {1}); |
| testReverse(new long[] {1, 2}, new long[] {2, 1}); |
| testReverse(new long[] {3, 1, 1}, new long[] {1, 1, 3}); |
| testReverse(new long[] {-1, 1, -2, 2}, new long[] {2, -2, 1, -1}); |
| } |
| |
| private static void testReverse(long[] input, long[] expectedOutput) { |
| input = Arrays.copyOf(input, input.length); |
| Longs.reverse(input); |
| assertTrue(Arrays.equals(expectedOutput, input)); |
| } |
| |
| private static void testReverse(long[] input, int fromIndex, int toIndex, long[] expectedOutput) { |
| input = Arrays.copyOf(input, input.length); |
| Longs.reverse(input, fromIndex, toIndex); |
| assertTrue(Arrays.equals(expectedOutput, input)); |
| } |
| |
| public void testReverseIndexed() { |
| testReverse(new long[] {}, 0, 0, new long[] {}); |
| testReverse(new long[] {1}, 0, 1, new long[] {1}); |
| testReverse(new long[] {1, 2}, 0, 2, new long[] {2, 1}); |
| testReverse(new long[] {3, 1, 1}, 0, 2, new long[] {1, 3, 1}); |
| testReverse(new long[] {3, 1, 1}, 0, 1, new long[] {3, 1, 1}); |
| testReverse(new long[] {-1, 1, -2, 2}, 1, 3, new long[] {-1, -2, 1, 2}); |
| } |
| |
| public void testSortDescending() { |
| testSortDescending(new long[] {}, new long[] {}); |
| testSortDescending(new long[] {1}, new long[] {1}); |
| testSortDescending(new long[] {1, 2}, new long[] {2, 1}); |
| testSortDescending(new long[] {1, 3, 1}, new long[] {3, 1, 1}); |
| testSortDescending(new long[] {-1, 1, -2, 2}, new long[] {2, 1, -1, -2}); |
| } |
| |
| private static void testSortDescending(long[] input, long[] expectedOutput) { |
| input = Arrays.copyOf(input, input.length); |
| Longs.sortDescending(input); |
| assertTrue(Arrays.equals(expectedOutput, input)); |
| } |
| |
| private static void testSortDescending( |
| long[] input, int fromIndex, int toIndex, long[] expectedOutput) { |
| input = Arrays.copyOf(input, input.length); |
| Longs.sortDescending(input, fromIndex, toIndex); |
| assertTrue(Arrays.equals(expectedOutput, input)); |
| } |
| |
| public void testSortDescendingIndexed() { |
| testSortDescending(new long[] {}, 0, 0, new long[] {}); |
| testSortDescending(new long[] {1}, 0, 1, new long[] {1}); |
| testSortDescending(new long[] {1, 2}, 0, 2, new long[] {2, 1}); |
| testSortDescending(new long[] {1, 3, 1}, 0, 2, new long[] {3, 1, 1}); |
| testSortDescending(new long[] {1, 3, 1}, 0, 1, new long[] {1, 3, 1}); |
| testSortDescending(new long[] {-1, -2, 1, 2}, 1, 3, new long[] {-1, 1, -2, 2}); |
| } |
| |
| @GwtIncompatible // SerializableTester |
| public void testStringConverterSerialization() { |
| SerializableTester.reserializeAndAssert(Longs.stringConverter()); |
| } |
| |
| public void testToArray() { |
| // need explicit type parameter to avoid javac warning!? |
| List<Long> none = Arrays.<Long>asList(); |
| assertTrue(Arrays.equals(EMPTY, Longs.toArray(none))); |
| |
| List<Long> one = Arrays.asList((long) 1); |
| assertTrue(Arrays.equals(ARRAY1, Longs.toArray(one))); |
| |
| long[] array = {(long) 0, (long) 1, 0x0FF1C1AL}; |
| |
| List<Long> three = Arrays.asList((long) 0, (long) 1, 0x0FF1C1AL); |
| assertTrue(Arrays.equals(array, Longs.toArray(three))); |
| |
| assertTrue(Arrays.equals(array, Longs.toArray(Longs.asList(array)))); |
| } |
| |
| public void testToArray_threadSafe() { |
| for (int delta : new int[] {+1, 0, -1}) { |
| for (int i = 0; i < VALUES.length; i++) { |
| List<Long> list = Longs.asList(VALUES).subList(0, i); |
| Collection<Long> misleadingSize = Helpers.misleadingSizeCollection(delta); |
| misleadingSize.addAll(list); |
| long[] arr = Longs.toArray(misleadingSize); |
| assertEquals(i, arr.length); |
| for (int j = 0; j < i; j++) { |
| assertEquals(VALUES[j], arr[j]); |
| } |
| } |
| } |
| } |
| |
| public void testToArray_withNull() { |
| List<Long> list = Arrays.asList((long) 0, (long) 1, null); |
| try { |
| Longs.toArray(list); |
| fail(); |
| } catch (NullPointerException expected) { |
| } |
| } |
| |
| public void testToArray_withConversion() { |
| long[] array = {(long) 0, (long) 1, (long) 2}; |
| |
| List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2); |
| List<Short> shorts = Arrays.asList((short) 0, (short) 1, (short) 2); |
| List<Integer> ints = Arrays.asList(0, 1, 2); |
| List<Float> floats = Arrays.asList((float) 0, (float) 1, (float) 2); |
| List<Long> longs = Arrays.asList((long) 0, (long) 1, (long) 2); |
| List<Double> doubles = Arrays.asList((double) 0, (double) 1, (double) 2); |
| |
| assertTrue(Arrays.equals(array, Longs.toArray(bytes))); |
| assertTrue(Arrays.equals(array, Longs.toArray(shorts))); |
| assertTrue(Arrays.equals(array, Longs.toArray(ints))); |
| assertTrue(Arrays.equals(array, Longs.toArray(floats))); |
| assertTrue(Arrays.equals(array, Longs.toArray(longs))); |
| assertTrue(Arrays.equals(array, Longs.toArray(doubles))); |
| } |
| |
| public void testAsList_isAView() { |
| long[] array = {(long) 0, (long) 1}; |
| List<Long> list = Longs.asList(array); |
| list.set(0, (long) 2); |
| assertTrue(Arrays.equals(new long[] {(long) 2, (long) 1}, array)); |
| array[1] = (long) 3; |
| assertEquals(Arrays.asList((long) 2, (long) 3), list); |
| } |
| |
| public void testAsList_toArray_roundTrip() { |
| long[] array = {(long) 0, (long) 1, (long) 2}; |
| List<Long> list = Longs.asList(array); |
| long[] newArray = Longs.toArray(list); |
| |
| // Make sure it returned a copy |
| list.set(0, (long) 4); |
| assertTrue(Arrays.equals(new long[] {(long) 0, (long) 1, (long) 2}, newArray)); |
| newArray[1] = (long) 5; |
| assertEquals((long) 1, (long) list.get(1)); |
| } |
| |
| // This test stems from a real bug found by andrewk |
| public void testAsList_subList_toArray_roundTrip() { |
| long[] array = {(long) 0, (long) 1, (long) 2, (long) 3}; |
| List<Long> list = Longs.asList(array); |
| assertTrue(Arrays.equals(new long[] {(long) 1, (long) 2}, Longs.toArray(list.subList(1, 3)))); |
| assertTrue(Arrays.equals(new long[] {}, Longs.toArray(list.subList(2, 2)))); |
| } |
| |
| public void testAsListEmpty() { |
| assertSame(Collections.emptyList(), Longs.asList(EMPTY)); |
| } |
| |
| @GwtIncompatible // NullPointerTester |
| public void testNulls() { |
| new NullPointerTester().testAllPublicStaticMethods(Longs.class); |
| } |
| |
| public void testStringConverter_convert() { |
| Converter<String, Long> converter = Longs.stringConverter(); |
| assertEquals((Long) 1L, converter.convert("1")); |
| assertEquals((Long) 0L, converter.convert("0")); |
| assertEquals((Long) (-1L), converter.convert("-1")); |
| assertEquals((Long) 255L, converter.convert("0xff")); |
| assertEquals((Long) 255L, converter.convert("0xFF")); |
| assertEquals((Long) (-255L), converter.convert("-0xFF")); |
| assertEquals((Long) 255L, converter.convert("#0000FF")); |
| assertEquals((Long) 438L, converter.convert("0666")); |
| } |
| |
| public void testStringConverter_convertError() { |
| try { |
| Longs.stringConverter().convert("notanumber"); |
| fail(); |
| } catch (NumberFormatException expected) { |
| } |
| } |
| |
| public void testStringConverter_nullConversions() { |
| assertNull(Longs.stringConverter().convert(null)); |
| assertNull(Longs.stringConverter().reverse().convert(null)); |
| } |
| |
| public void testStringConverter_reverse() { |
| Converter<String, Long> converter = Longs.stringConverter(); |
| assertEquals("1", converter.reverse().convert(1L)); |
| assertEquals("0", converter.reverse().convert(0L)); |
| assertEquals("-1", converter.reverse().convert(-1L)); |
| assertEquals("255", converter.reverse().convert(0xffL)); |
| assertEquals("255", converter.reverse().convert(0xFFL)); |
| assertEquals("-255", converter.reverse().convert(-0xFFL)); |
| assertEquals("438", converter.reverse().convert(0666L)); |
| } |
| |
| @GwtIncompatible // NullPointerTester |
| public void testStringConverter_nullPointerTester() throws Exception { |
| NullPointerTester tester = new NullPointerTester(); |
| tester.testAllPublicInstanceMethods(Longs.stringConverter()); |
| } |
| |
| public void testTryParse() { |
| tryParseAndAssertEquals(0L, "0"); |
| tryParseAndAssertEquals(0L, "-0"); |
| tryParseAndAssertEquals(1L, "1"); |
| tryParseAndAssertEquals(-1L, "-1"); |
| tryParseAndAssertEquals(8900L, "8900"); |
| tryParseAndAssertEquals(-8900L, "-8900"); |
| tryParseAndAssertEquals(MAX_VALUE, Long.toString(MAX_VALUE)); |
| tryParseAndAssertEquals(MIN_VALUE, Long.toString(MIN_VALUE)); |
| assertNull(Longs.tryParse("")); |
| assertNull(Longs.tryParse("-")); |
| assertNull(Longs.tryParse("+1")); |
| assertNull(Longs.tryParse("999999999999999999999999")); |
| assertNull( |
| "Max long + 1", |
| Longs.tryParse(BigInteger.valueOf(MAX_VALUE).add(BigInteger.ONE).toString())); |
| assertNull( |
| "Max long * 10", |
| Longs.tryParse(BigInteger.valueOf(MAX_VALUE).multiply(BigInteger.TEN).toString())); |
| assertNull( |
| "Min long - 1", |
| Longs.tryParse(BigInteger.valueOf(MIN_VALUE).subtract(BigInteger.ONE).toString())); |
| assertNull( |
| "Min long * 10", |
| Longs.tryParse(BigInteger.valueOf(MIN_VALUE).multiply(BigInteger.TEN).toString())); |
| assertNull(Longs.tryParse("\u0662\u06f3")); |
| } |
| |
| /** |
| * Applies {@link Longs#tryParse(String)} to the given string and asserts that the result is as |
| * expected. |
| */ |
| private static void tryParseAndAssertEquals(Long expected, String value) { |
| assertEquals(expected, Longs.tryParse(value)); |
| } |
| |
| public void testTryParse_radix() { |
| for (int radix = Character.MIN_RADIX; radix <= Character.MAX_RADIX; radix++) { |
| radixEncodeParseAndAssertEquals((long) 0, radix); |
| radixEncodeParseAndAssertEquals((long) 8000, radix); |
| radixEncodeParseAndAssertEquals((long) -8000, radix); |
| radixEncodeParseAndAssertEquals(MAX_VALUE, radix); |
| radixEncodeParseAndAssertEquals(MIN_VALUE, radix); |
| assertNull("Radix: " + radix, Longs.tryParse("999999999999999999999999", radix)); |
| assertNull( |
| "Radix: " + radix, |
| Longs.tryParse(BigInteger.valueOf(MAX_VALUE).add(BigInteger.ONE).toString(), radix)); |
| assertNull( |
| "Radix: " + radix, |
| Longs.tryParse(BigInteger.valueOf(MIN_VALUE).subtract(BigInteger.ONE).toString(), radix)); |
| } |
| assertNull("Hex string and dec parm", Longs.tryParse("FFFF", 10)); |
| assertEquals("Mixed hex case", 65535, Longs.tryParse("ffFF", 16).longValue()); |
| } |
| |
| /** |
| * Encodes the long as a string with given radix, then uses {@link Longs#tryParse(String, int)} to |
| * parse the result. Asserts the result is the same as what we started with. |
| */ |
| private static void radixEncodeParseAndAssertEquals(Long value, int radix) { |
| assertEquals("Radix: " + radix, value, Longs.tryParse(Long.toString(value, radix), radix)); |
| } |
| |
| public void testTryParse_radixTooBig() { |
| try { |
| Longs.tryParse("0", Character.MAX_RADIX + 1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testTryParse_radixTooSmall() { |
| try { |
| Longs.tryParse("0", Character.MIN_RADIX - 1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testTryParse_withNullGwt() { |
| assertNull(Longs.tryParse("null")); |
| try { |
| Longs.tryParse(null); |
| fail("Expected NPE"); |
| } catch (NullPointerException expected) { |
| } |
| } |
| } |
