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1 /*
2  * Copyright (C) 2008 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * 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 com.google.common.primitives;
18 
19 import com.google.common.annotations.GwtCompatible;
20 import com.google.common.annotations.GwtIncompatible;
21 import com.google.common.base.Converter;
22 import com.google.common.collect.testing.Helpers;
23 import com.google.common.testing.NullPointerTester;
24 import com.google.common.testing.SerializableTester;
25 import java.util.Arrays;
26 import java.util.Collection;
27 import java.util.Collections;
28 import java.util.Comparator;
29 import java.util.List;
30 import java.util.Random;
31 import junit.framework.TestCase;
32 
33 /**
34  * Unit test for {@link Shorts}.
35  *
36  * @author Kevin Bourrillion
37  */
38 @GwtCompatible(emulated = true)
39 @SuppressWarnings("cast") // redundant casts are intentional and harmless
40 public class ShortsTest extends TestCase {
41   private static final short[] EMPTY = {};
42   private static final short[] ARRAY1 = {(short) 1};
43   private static final short[] ARRAY234 = {(short) 2, (short) 3, (short) 4};
44 
45   private static final short LEAST = Short.MIN_VALUE;
46   private static final short GREATEST = Short.MAX_VALUE;
47 
48   private static final short[] VALUES = {LEAST, (short) -1, (short) 0, (short) 1, GREATEST};
49 
testHashCode()50   public void testHashCode() {
51     for (short value : VALUES) {
52       assertEquals(((Short) value).hashCode(), Shorts.hashCode(value));
53     }
54   }
55 
testCheckedCast()56   public void testCheckedCast() {
57     for (short value : VALUES) {
58       assertEquals(value, Shorts.checkedCast((long) value));
59     }
60     assertCastFails(GREATEST + 1L);
61     assertCastFails(LEAST - 1L);
62     assertCastFails(Long.MAX_VALUE);
63     assertCastFails(Long.MIN_VALUE);
64   }
65 
testSaturatedCast()66   public void testSaturatedCast() {
67     for (short value : VALUES) {
68       assertEquals(value, Shorts.saturatedCast((long) value));
69     }
70     assertEquals(GREATEST, Shorts.saturatedCast(GREATEST + 1L));
71     assertEquals(LEAST, Shorts.saturatedCast(LEAST - 1L));
72     assertEquals(GREATEST, Shorts.saturatedCast(Long.MAX_VALUE));
73     assertEquals(LEAST, Shorts.saturatedCast(Long.MIN_VALUE));
74   }
75 
assertCastFails(long value)76   private static void assertCastFails(long value) {
77     try {
78       Shorts.checkedCast(value);
79       fail("Cast to short should have failed: " + value);
80     } catch (IllegalArgumentException ex) {
81       assertTrue(
82           value + " not found in exception text: " + ex.getMessage(),
83           ex.getMessage().contains(String.valueOf(value)));
84     }
85   }
86 
testCompare()87   public void testCompare() {
88     for (short x : VALUES) {
89       for (short y : VALUES) {
90         // Only compare the sign of the result of compareTo().
91         int expected = Short.valueOf(x).compareTo(y);
92         int actual = Shorts.compare(x, y);
93         if (expected == 0) {
94           assertEquals(x + ", " + y, expected, actual);
95         } else if (expected < 0) {
96           assertTrue(
97               x + ", " + y + " (expected: " + expected + ", actual" + actual + ")", actual < 0);
98         } else {
99           assertTrue(
100               x + ", " + y + " (expected: " + expected + ", actual" + actual + ")", actual > 0);
101         }
102       }
103     }
104   }
105 
testContains()106   public void testContains() {
107     assertFalse(Shorts.contains(EMPTY, (short) 1));
108     assertFalse(Shorts.contains(ARRAY1, (short) 2));
109     assertFalse(Shorts.contains(ARRAY234, (short) 1));
110     assertTrue(Shorts.contains(new short[] {(short) -1}, (short) -1));
111     assertTrue(Shorts.contains(ARRAY234, (short) 2));
112     assertTrue(Shorts.contains(ARRAY234, (short) 3));
113     assertTrue(Shorts.contains(ARRAY234, (short) 4));
114   }
115 
testIndexOf()116   public void testIndexOf() {
117     assertEquals(-1, Shorts.indexOf(EMPTY, (short) 1));
118     assertEquals(-1, Shorts.indexOf(ARRAY1, (short) 2));
119     assertEquals(-1, Shorts.indexOf(ARRAY234, (short) 1));
120     assertEquals(0, Shorts.indexOf(new short[] {(short) -1}, (short) -1));
121     assertEquals(0, Shorts.indexOf(ARRAY234, (short) 2));
122     assertEquals(1, Shorts.indexOf(ARRAY234, (short) 3));
123     assertEquals(2, Shorts.indexOf(ARRAY234, (short) 4));
124     assertEquals(
125         1, Shorts.indexOf(new short[] {(short) 2, (short) 3, (short) 2, (short) 3}, (short) 3));
126   }
127 
testIndexOf_arrayTarget()128   public void testIndexOf_arrayTarget() {
129     assertEquals(0, Shorts.indexOf(EMPTY, EMPTY));
130     assertEquals(0, Shorts.indexOf(ARRAY234, EMPTY));
131     assertEquals(-1, Shorts.indexOf(EMPTY, ARRAY234));
132     assertEquals(-1, Shorts.indexOf(ARRAY234, ARRAY1));
133     assertEquals(-1, Shorts.indexOf(ARRAY1, ARRAY234));
134     assertEquals(0, Shorts.indexOf(ARRAY1, ARRAY1));
135     assertEquals(0, Shorts.indexOf(ARRAY234, ARRAY234));
136     assertEquals(0, Shorts.indexOf(ARRAY234, new short[] {(short) 2, (short) 3}));
137     assertEquals(1, Shorts.indexOf(ARRAY234, new short[] {(short) 3, (short) 4}));
138     assertEquals(1, Shorts.indexOf(ARRAY234, new short[] {(short) 3}));
139     assertEquals(2, Shorts.indexOf(ARRAY234, new short[] {(short) 4}));
140     assertEquals(
141         1,
142         Shorts.indexOf(
143             new short[] {(short) 2, (short) 3, (short) 3, (short) 3, (short) 3},
144             new short[] {(short) 3}));
145     assertEquals(
146         2,
147         Shorts.indexOf(
148             new short[] {
149               (short) 2, (short) 3, (short) 2, (short) 3, (short) 4, (short) 2, (short) 3
150             },
151             new short[] {(short) 2, (short) 3, (short) 4}));
152     assertEquals(
153         1,
154         Shorts.indexOf(
155             new short[] {
156               (short) 2, (short) 2, (short) 3, (short) 4, (short) 2, (short) 3, (short) 4
157             },
158             new short[] {(short) 2, (short) 3, (short) 4}));
159     assertEquals(
160         -1,
161         Shorts.indexOf(
162             new short[] {(short) 4, (short) 3, (short) 2},
163             new short[] {(short) 2, (short) 3, (short) 4}));
164   }
165 
testLastIndexOf()166   public void testLastIndexOf() {
167     assertEquals(-1, Shorts.lastIndexOf(EMPTY, (short) 1));
168     assertEquals(-1, Shorts.lastIndexOf(ARRAY1, (short) 2));
169     assertEquals(-1, Shorts.lastIndexOf(ARRAY234, (short) 1));
170     assertEquals(0, Shorts.lastIndexOf(new short[] {(short) -1}, (short) -1));
171     assertEquals(0, Shorts.lastIndexOf(ARRAY234, (short) 2));
172     assertEquals(1, Shorts.lastIndexOf(ARRAY234, (short) 3));
173     assertEquals(2, Shorts.lastIndexOf(ARRAY234, (short) 4));
174     assertEquals(
175         3, Shorts.lastIndexOf(new short[] {(short) 2, (short) 3, (short) 2, (short) 3}, (short) 3));
176   }
177 
178   @GwtIncompatible
testMax_noArgs()179   public void testMax_noArgs() {
180     try {
181       Shorts.max();
182       fail();
183     } catch (IllegalArgumentException expected) {
184     }
185   }
186 
testMax()187   public void testMax() {
188     assertEquals(LEAST, Shorts.max(LEAST));
189     assertEquals(GREATEST, Shorts.max(GREATEST));
190     assertEquals(
191         (short) 9,
192         Shorts.max((short) 8, (short) 6, (short) 7, (short) 5, (short) 3, (short) 0, (short) 9));
193   }
194 
195   @GwtIncompatible
testMin_noArgs()196   public void testMin_noArgs() {
197     try {
198       Shorts.min();
199       fail();
200     } catch (IllegalArgumentException expected) {
201     }
202   }
203 
testMin()204   public void testMin() {
205     assertEquals(LEAST, Shorts.min(LEAST));
206     assertEquals(GREATEST, Shorts.min(GREATEST));
207     assertEquals(
208         (short) 0,
209         Shorts.min((short) 8, (short) 6, (short) 7, (short) 5, (short) 3, (short) 0, (short) 9));
210   }
211 
testConstrainToRange()212   public void testConstrainToRange() {
213     assertEquals((short) 1, Shorts.constrainToRange((short) 1, (short) 0, (short) 5));
214     assertEquals((short) 1, Shorts.constrainToRange((short) 1, (short) 1, (short) 5));
215     assertEquals((short) 3, Shorts.constrainToRange((short) 1, (short) 3, (short) 5));
216     assertEquals((short) -1, Shorts.constrainToRange((short) 0, (short) -5, (short) -1));
217     assertEquals((short) 2, Shorts.constrainToRange((short) 5, (short) 2, (short) 2));
218     try {
219       Shorts.constrainToRange((short) 1, (short) 3, (short) 2);
220       fail();
221     } catch (IllegalArgumentException expected) {
222     }
223   }
224 
testConcat()225   public void testConcat() {
226     assertTrue(Arrays.equals(EMPTY, Shorts.concat()));
227     assertTrue(Arrays.equals(EMPTY, Shorts.concat(EMPTY)));
228     assertTrue(Arrays.equals(EMPTY, Shorts.concat(EMPTY, EMPTY, EMPTY)));
229     assertTrue(Arrays.equals(ARRAY1, Shorts.concat(ARRAY1)));
230     assertNotSame(ARRAY1, Shorts.concat(ARRAY1));
231     assertTrue(Arrays.equals(ARRAY1, Shorts.concat(EMPTY, ARRAY1, EMPTY)));
232     assertTrue(
233         Arrays.equals(
234             new short[] {(short) 1, (short) 1, (short) 1}, Shorts.concat(ARRAY1, ARRAY1, ARRAY1)));
235     assertTrue(
236         Arrays.equals(
237             new short[] {(short) 1, (short) 2, (short) 3, (short) 4},
238             Shorts.concat(ARRAY1, ARRAY234)));
239   }
240 
241   @GwtIncompatible // Shorts.toByteArray
testToByteArray()242   public void testToByteArray() {
243     assertTrue(Arrays.equals(new byte[] {0x23, 0x45}, Shorts.toByteArray((short) 0x2345)));
244     assertTrue(
245         Arrays.equals(new byte[] {(byte) 0xFE, (byte) 0xDC}, Shorts.toByteArray((short) 0xFEDC)));
246   }
247 
248   @GwtIncompatible // Shorts.fromByteArray
testFromByteArray()249   public void testFromByteArray() {
250     assertEquals((short) 0x2345, Shorts.fromByteArray(new byte[] {0x23, 0x45}));
251     assertEquals((short) 0xFEDC, Shorts.fromByteArray(new byte[] {(byte) 0xFE, (byte) 0xDC}));
252   }
253 
254   @GwtIncompatible // Shorts.fromByteArray
testFromByteArrayFails()255   public void testFromByteArrayFails() {
256     try {
257       Shorts.fromByteArray(new byte[] {0x01});
258       fail();
259     } catch (IllegalArgumentException expected) {
260     }
261   }
262 
263   @GwtIncompatible // Shorts.fromBytes
testFromBytes()264   public void testFromBytes() {
265     assertEquals((short) 0x2345, Shorts.fromBytes((byte) 0x23, (byte) 0x45));
266     assertEquals((short) 0xFEDC, Shorts.fromBytes((byte) 0xFE, (byte) 0xDC));
267   }
268 
269   @GwtIncompatible // Shorts.fromByteArray, Shorts.toByteArray
testByteArrayRoundTrips()270   public void testByteArrayRoundTrips() {
271     Random r = new Random(5);
272     byte[] b = new byte[Shorts.BYTES];
273 
274     // total overkill, but, it takes 0.1 sec so why not...
275     for (int i = 0; i < 10000; i++) {
276       short num = (short) r.nextInt();
277       assertEquals(num, Shorts.fromByteArray(Shorts.toByteArray(num)));
278 
279       r.nextBytes(b);
280       assertTrue(Arrays.equals(b, Shorts.toByteArray(Shorts.fromByteArray(b))));
281     }
282   }
283 
testEnsureCapacity()284   public void testEnsureCapacity() {
285     assertSame(EMPTY, Shorts.ensureCapacity(EMPTY, 0, 1));
286     assertSame(ARRAY1, Shorts.ensureCapacity(ARRAY1, 0, 1));
287     assertSame(ARRAY1, Shorts.ensureCapacity(ARRAY1, 1, 1));
288     assertTrue(
289         Arrays.equals(
290             new short[] {(short) 1, (short) 0, (short) 0}, Shorts.ensureCapacity(ARRAY1, 2, 1)));
291   }
292 
testEnsureCapacity_fail()293   public void testEnsureCapacity_fail() {
294     try {
295       Shorts.ensureCapacity(ARRAY1, -1, 1);
296       fail();
297     } catch (IllegalArgumentException expected) {
298     }
299     try {
300       // notice that this should even fail when no growth was needed
301       Shorts.ensureCapacity(ARRAY1, 1, -1);
302       fail();
303     } catch (IllegalArgumentException expected) {
304     }
305   }
306 
testJoin()307   public void testJoin() {
308     assertEquals("", Shorts.join(",", EMPTY));
309     assertEquals("1", Shorts.join(",", ARRAY1));
310     assertEquals("1,2", Shorts.join(",", (short) 1, (short) 2));
311     assertEquals("123", Shorts.join("", (short) 1, (short) 2, (short) 3));
312   }
313 
testLexicographicalComparator()314   public void testLexicographicalComparator() {
315     List<short[]> ordered =
316         Arrays.asList(
317             new short[] {},
318             new short[] {LEAST},
319             new short[] {LEAST, LEAST},
320             new short[] {LEAST, (short) 1},
321             new short[] {(short) 1},
322             new short[] {(short) 1, LEAST},
323             new short[] {GREATEST, GREATEST - (short) 1},
324             new short[] {GREATEST, GREATEST},
325             new short[] {GREATEST, GREATEST, GREATEST});
326 
327     Comparator<short[]> comparator = Shorts.lexicographicalComparator();
328     Helpers.testComparator(comparator, ordered);
329   }
330 
331   @GwtIncompatible // SerializableTester
testLexicographicalComparatorSerializable()332   public void testLexicographicalComparatorSerializable() {
333     Comparator<short[]> comparator = Shorts.lexicographicalComparator();
334     assertSame(comparator, SerializableTester.reserialize(comparator));
335   }
336 
testReverse()337   public void testReverse() {
338     testReverse(new short[] {}, new short[] {});
339     testReverse(new short[] {1}, new short[] {1});
340     testReverse(new short[] {1, 2}, new short[] {2, 1});
341     testReverse(new short[] {3, 1, 1}, new short[] {1, 1, 3});
342     testReverse(new short[] {-1, 1, -2, 2}, new short[] {2, -2, 1, -1});
343   }
344 
testReverse(short[] input, short[] expectedOutput)345   private static void testReverse(short[] input, short[] expectedOutput) {
346     input = Arrays.copyOf(input, input.length);
347     Shorts.reverse(input);
348     assertTrue(Arrays.equals(expectedOutput, input));
349   }
350 
testReverse( short[] input, int fromIndex, int toIndex, short[] expectedOutput)351   private static void testReverse(
352       short[] input, int fromIndex, int toIndex, short[] expectedOutput) {
353     input = Arrays.copyOf(input, input.length);
354     Shorts.reverse(input, fromIndex, toIndex);
355     assertTrue(Arrays.equals(expectedOutput, input));
356   }
357 
testReverseIndexed()358   public void testReverseIndexed() {
359     testReverse(new short[] {}, 0, 0, new short[] {});
360     testReverse(new short[] {1}, 0, 1, new short[] {1});
361     testReverse(new short[] {1, 2}, 0, 2, new short[] {2, 1});
362     testReverse(new short[] {3, 1, 1}, 0, 2, new short[] {1, 3, 1});
363     testReverse(new short[] {3, 1, 1}, 0, 1, new short[] {3, 1, 1});
364     testReverse(new short[] {-1, 1, -2, 2}, 1, 3, new short[] {-1, -2, 1, 2});
365   }
366 
testSortDescending()367   public void testSortDescending() {
368     testSortDescending(new short[] {}, new short[] {});
369     testSortDescending(new short[] {1}, new short[] {1});
370     testSortDescending(new short[] {1, 2}, new short[] {2, 1});
371     testSortDescending(new short[] {1, 3, 1}, new short[] {3, 1, 1});
372     testSortDescending(new short[] {-1, 1, -2, 2}, new short[] {2, 1, -1, -2});
373   }
374 
testSortDescending(short[] input, short[] expectedOutput)375   private static void testSortDescending(short[] input, short[] expectedOutput) {
376     input = Arrays.copyOf(input, input.length);
377     Shorts.sortDescending(input);
378     assertTrue(Arrays.equals(expectedOutput, input));
379   }
380 
testSortDescending( short[] input, int fromIndex, int toIndex, short[] expectedOutput)381   private static void testSortDescending(
382       short[] input, int fromIndex, int toIndex, short[] expectedOutput) {
383     input = Arrays.copyOf(input, input.length);
384     Shorts.sortDescending(input, fromIndex, toIndex);
385     assertTrue(Arrays.equals(expectedOutput, input));
386   }
387 
testSortDescendingIndexed()388   public void testSortDescendingIndexed() {
389     testSortDescending(new short[] {}, 0, 0, new short[] {});
390     testSortDescending(new short[] {1}, 0, 1, new short[] {1});
391     testSortDescending(new short[] {1, 2}, 0, 2, new short[] {2, 1});
392     testSortDescending(new short[] {1, 3, 1}, 0, 2, new short[] {3, 1, 1});
393     testSortDescending(new short[] {1, 3, 1}, 0, 1, new short[] {1, 3, 1});
394     testSortDescending(new short[] {-1, -2, 1, 2}, 1, 3, new short[] {-1, 1, -2, 2});
395   }
396 
397   @GwtIncompatible // SerializableTester
testStringConverterSerialization()398   public void testStringConverterSerialization() {
399     SerializableTester.reserializeAndAssert(Shorts.stringConverter());
400   }
401 
testToArray()402   public void testToArray() {
403     // need explicit type parameter to avoid javac warning!?
404     List<Short> none = Arrays.<Short>asList();
405     assertTrue(Arrays.equals(EMPTY, Shorts.toArray(none)));
406 
407     List<Short> one = Arrays.asList((short) 1);
408     assertTrue(Arrays.equals(ARRAY1, Shorts.toArray(one)));
409 
410     short[] array = {(short) 0, (short) 1, (short) 3};
411 
412     List<Short> three = Arrays.asList((short) 0, (short) 1, (short) 3);
413     assertTrue(Arrays.equals(array, Shorts.toArray(three)));
414 
415     assertTrue(Arrays.equals(array, Shorts.toArray(Shorts.asList(array))));
416   }
417 
testToArray_threadSafe()418   public void testToArray_threadSafe() {
419     for (int delta : new int[] {+1, 0, -1}) {
420       for (int i = 0; i < VALUES.length; i++) {
421         List<Short> list = Shorts.asList(VALUES).subList(0, i);
422         Collection<Short> misleadingSize = Helpers.misleadingSizeCollection(delta);
423         misleadingSize.addAll(list);
424         short[] arr = Shorts.toArray(misleadingSize);
425         assertEquals(i, arr.length);
426         for (int j = 0; j < i; j++) {
427           assertEquals(VALUES[j], arr[j]);
428         }
429       }
430     }
431   }
432 
testToArray_withNull()433   public void testToArray_withNull() {
434     List<Short> list = Arrays.asList((short) 0, (short) 1, null);
435     try {
436       Shorts.toArray(list);
437       fail();
438     } catch (NullPointerException expected) {
439     }
440   }
441 
testToArray_withConversion()442   public void testToArray_withConversion() {
443     short[] array = {(short) 0, (short) 1, (short) 2};
444 
445     List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2);
446     List<Short> shorts = Arrays.asList((short) 0, (short) 1, (short) 2);
447     List<Integer> ints = Arrays.asList(0, 1, 2);
448     List<Float> floats = Arrays.asList((float) 0, (float) 1, (float) 2);
449     List<Long> longs = Arrays.asList((long) 0, (long) 1, (long) 2);
450     List<Double> doubles = Arrays.asList((double) 0, (double) 1, (double) 2);
451 
452     assertTrue(Arrays.equals(array, Shorts.toArray(bytes)));
453     assertTrue(Arrays.equals(array, Shorts.toArray(shorts)));
454     assertTrue(Arrays.equals(array, Shorts.toArray(ints)));
455     assertTrue(Arrays.equals(array, Shorts.toArray(floats)));
456     assertTrue(Arrays.equals(array, Shorts.toArray(longs)));
457     assertTrue(Arrays.equals(array, Shorts.toArray(doubles)));
458   }
459 
testAsList_isAView()460   public void testAsList_isAView() {
461     short[] array = {(short) 0, (short) 1};
462     List<Short> list = Shorts.asList(array);
463     list.set(0, (short) 2);
464     assertTrue(Arrays.equals(new short[] {(short) 2, (short) 1}, array));
465     array[1] = (short) 3;
466     assertEquals(Arrays.asList((short) 2, (short) 3), list);
467   }
468 
testAsList_toArray_roundTrip()469   public void testAsList_toArray_roundTrip() {
470     short[] array = {(short) 0, (short) 1, (short) 2};
471     List<Short> list = Shorts.asList(array);
472     short[] newArray = Shorts.toArray(list);
473 
474     // Make sure it returned a copy
475     list.set(0, (short) 4);
476     assertTrue(Arrays.equals(new short[] {(short) 0, (short) 1, (short) 2}, newArray));
477     newArray[1] = (short) 5;
478     assertEquals((short) 1, (short) list.get(1));
479   }
480 
481   // This test stems from a real bug found by andrewk
testAsList_subList_toArray_roundTrip()482   public void testAsList_subList_toArray_roundTrip() {
483     short[] array = {(short) 0, (short) 1, (short) 2, (short) 3};
484     List<Short> list = Shorts.asList(array);
485     assertTrue(
486         Arrays.equals(new short[] {(short) 1, (short) 2}, Shorts.toArray(list.subList(1, 3))));
487     assertTrue(Arrays.equals(new short[] {}, Shorts.toArray(list.subList(2, 2))));
488   }
489 
testAsListEmpty()490   public void testAsListEmpty() {
491     assertSame(Collections.emptyList(), Shorts.asList(EMPTY));
492   }
493 
494   @GwtIncompatible // NullPointerTester
testNulls()495   public void testNulls() {
496     new NullPointerTester().testAllPublicStaticMethods(Shorts.class);
497   }
498 
testStringConverter_convert()499   public void testStringConverter_convert() {
500     Converter<String, Short> converter = Shorts.stringConverter();
501     assertEquals((Short) (short) 1, converter.convert("1"));
502     assertEquals((Short) (short) 0, converter.convert("0"));
503     assertEquals((Short) (short) (-1), converter.convert("-1"));
504     assertEquals((Short) (short) 255, converter.convert("0xff"));
505     assertEquals((Short) (short) 255, converter.convert("0xFF"));
506     assertEquals((Short) (short) (-255), converter.convert("-0xFF"));
507     assertEquals((Short) (short) 255, converter.convert("#0000FF"));
508     assertEquals((Short) (short) 438, converter.convert("0666"));
509   }
510 
testStringConverter_convertError()511   public void testStringConverter_convertError() {
512     try {
513       Shorts.stringConverter().convert("notanumber");
514       fail();
515     } catch (NumberFormatException expected) {
516     }
517   }
518 
testStringConverter_nullConversions()519   public void testStringConverter_nullConversions() {
520     assertNull(Shorts.stringConverter().convert(null));
521     assertNull(Shorts.stringConverter().reverse().convert(null));
522   }
523 
testStringConverter_reverse()524   public void testStringConverter_reverse() {
525     Converter<String, Short> converter = Shorts.stringConverter();
526     assertEquals("1", converter.reverse().convert((short) 1));
527     assertEquals("0", converter.reverse().convert((short) 0));
528     assertEquals("-1", converter.reverse().convert((short) -1));
529     assertEquals("255", converter.reverse().convert((short) 0xff));
530     assertEquals("255", converter.reverse().convert((short) 0xFF));
531     assertEquals("-255", converter.reverse().convert((short) -0xFF));
532     assertEquals("438", converter.reverse().convert((short) 0666));
533   }
534 
535   @GwtIncompatible // NullPointerTester
testStringConverter_nullPointerTester()536   public void testStringConverter_nullPointerTester() throws Exception {
537     NullPointerTester tester = new NullPointerTester();
538     tester.testAllPublicInstanceMethods(Shorts.stringConverter());
539   }
540 }
541