guava-tests/test/com/google/common/primitives/LongsTest.java - platform/external/guava - Git at Google

 /*
  * 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 junit.framework.TestCase;

 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;

 /**
  * 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 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}));

     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];

     // total overkill, but, it takes 0.1 sec so why not...
     for (int i = 0; i < 10000; 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));
   }

   @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());
   }

   @GwtIncompatible("AndroidInteger")
   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 integer + 1",
         Longs.tryParse(BigInteger.valueOf(MAX_VALUE).add(BigInteger.ONE).toString()));
     assertNull("Min integer - 1",
         Longs.tryParse(BigInteger.valueOf(MIN_VALUE).subtract(BigInteger.ONE).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));
   }
 }
	/*
	* 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 junit.framework.TestCase;

	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;

	/**
	* 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 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}));

	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];

	// total overkill, but, it takes 0.1 sec so why not...
	for (int i = 0; i < 10000; 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));
	}

	@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());
	}

	@GwtIncompatible("AndroidInteger")
	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 integer + 1",
	Longs.tryParse(BigInteger.valueOf(MAX_VALUE).add(BigInteger.ONE).toString()));
	assertNull("Min integer - 1",
	Longs.tryParse(BigInteger.valueOf(MIN_VALUE).subtract(BigInteger.ONE).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));
	}
	}