| /* |
| * 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 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.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 Ints}. |
| * |
| * @author Kevin Bourrillion |
| */ |
| @GwtCompatible(emulated = true) |
| @SuppressWarnings("cast") // redundant casts are intentional and harmless |
| public class IntsTest extends TestCase { |
| private static final int[] EMPTY = {}; |
| private static final int[] ARRAY1 = {(int) 1}; |
| private static final int[] ARRAY234 = {(int) 2, (int) 3, (int) 4}; |
| |
| private static final int LEAST = Integer.MIN_VALUE; |
| private static final int GREATEST = Integer.MAX_VALUE; |
| |
| private static final int[] VALUES = {LEAST, (int) -1, (int) 0, (int) 1, GREATEST}; |
| |
| public void testHashCode() { |
| for (int value : VALUES) { |
| assertEquals(((Integer) value).hashCode(), Ints.hashCode(value)); |
| } |
| } |
| |
| public void testCheckedCast() { |
| for (int value : VALUES) { |
| assertEquals(value, Ints.checkedCast((long) value)); |
| } |
| assertCastFails(GREATEST + 1L); |
| assertCastFails(LEAST - 1L); |
| assertCastFails(Long.MAX_VALUE); |
| assertCastFails(Long.MIN_VALUE); |
| } |
| |
| public void testSaturatedCast() { |
| for (int value : VALUES) { |
| assertEquals(value, Ints.saturatedCast((long) value)); |
| } |
| assertEquals(GREATEST, Ints.saturatedCast(GREATEST + 1L)); |
| assertEquals(LEAST, Ints.saturatedCast(LEAST - 1L)); |
| assertEquals(GREATEST, Ints.saturatedCast(Long.MAX_VALUE)); |
| assertEquals(LEAST, Ints.saturatedCast(Long.MIN_VALUE)); |
| } |
| |
| private static void assertCastFails(long value) { |
| try { |
| Ints.checkedCast(value); |
| fail("Cast to int should have failed: " + value); |
| } catch (IllegalArgumentException ex) { |
| assertTrue( |
| value + " not found in exception text: " + ex.getMessage(), |
| ex.getMessage().contains(String.valueOf(value))); |
| } |
| } |
| |
| public void testCompare() { |
| for (int x : VALUES) { |
| for (int y : VALUES) { |
| // note: spec requires only that the sign is the same |
| assertEquals(x + ", " + y, Integer.valueOf(x).compareTo(y), Ints.compare(x, y)); |
| } |
| } |
| } |
| |
| public void testContains() { |
| assertFalse(Ints.contains(EMPTY, (int) 1)); |
| assertFalse(Ints.contains(ARRAY1, (int) 2)); |
| assertFalse(Ints.contains(ARRAY234, (int) 1)); |
| assertTrue(Ints.contains(new int[] {(int) -1}, (int) -1)); |
| assertTrue(Ints.contains(ARRAY234, (int) 2)); |
| assertTrue(Ints.contains(ARRAY234, (int) 3)); |
| assertTrue(Ints.contains(ARRAY234, (int) 4)); |
| } |
| |
| public void testIndexOf() { |
| assertEquals(-1, Ints.indexOf(EMPTY, (int) 1)); |
| assertEquals(-1, Ints.indexOf(ARRAY1, (int) 2)); |
| assertEquals(-1, Ints.indexOf(ARRAY234, (int) 1)); |
| assertEquals(0, Ints.indexOf(new int[] {(int) -1}, (int) -1)); |
| assertEquals(0, Ints.indexOf(ARRAY234, (int) 2)); |
| assertEquals(1, Ints.indexOf(ARRAY234, (int) 3)); |
| assertEquals(2, Ints.indexOf(ARRAY234, (int) 4)); |
| assertEquals(1, Ints.indexOf(new int[] {(int) 2, (int) 3, (int) 2, (int) 3}, (int) 3)); |
| } |
| |
| public void testIndexOf_arrayTarget() { |
| assertEquals(0, Ints.indexOf(EMPTY, EMPTY)); |
| assertEquals(0, Ints.indexOf(ARRAY234, EMPTY)); |
| assertEquals(-1, Ints.indexOf(EMPTY, ARRAY234)); |
| assertEquals(-1, Ints.indexOf(ARRAY234, ARRAY1)); |
| assertEquals(-1, Ints.indexOf(ARRAY1, ARRAY234)); |
| assertEquals(0, Ints.indexOf(ARRAY1, ARRAY1)); |
| assertEquals(0, Ints.indexOf(ARRAY234, ARRAY234)); |
| assertEquals(0, Ints.indexOf(ARRAY234, new int[] {(int) 2, (int) 3})); |
| assertEquals(1, Ints.indexOf(ARRAY234, new int[] {(int) 3, (int) 4})); |
| assertEquals(1, Ints.indexOf(ARRAY234, new int[] {(int) 3})); |
| assertEquals(2, Ints.indexOf(ARRAY234, new int[] {(int) 4})); |
| assertEquals( |
| 1, |
| Ints.indexOf(new int[] {(int) 2, (int) 3, (int) 3, (int) 3, (int) 3}, new int[] {(int) 3})); |
| assertEquals( |
| 2, |
| Ints.indexOf( |
| new int[] {(int) 2, (int) 3, (int) 2, (int) 3, (int) 4, (int) 2, (int) 3}, |
| new int[] {(int) 2, (int) 3, (int) 4})); |
| assertEquals( |
| 1, |
| Ints.indexOf( |
| new int[] {(int) 2, (int) 2, (int) 3, (int) 4, (int) 2, (int) 3, (int) 4}, |
| new int[] {(int) 2, (int) 3, (int) 4})); |
| assertEquals( |
| -1, |
| Ints.indexOf(new int[] {(int) 4, (int) 3, (int) 2}, new int[] {(int) 2, (int) 3, (int) 4})); |
| } |
| |
| public void testLastIndexOf() { |
| assertEquals(-1, Ints.lastIndexOf(EMPTY, (int) 1)); |
| assertEquals(-1, Ints.lastIndexOf(ARRAY1, (int) 2)); |
| assertEquals(-1, Ints.lastIndexOf(ARRAY234, (int) 1)); |
| assertEquals(0, Ints.lastIndexOf(new int[] {(int) -1}, (int) -1)); |
| assertEquals(0, Ints.lastIndexOf(ARRAY234, (int) 2)); |
| assertEquals(1, Ints.lastIndexOf(ARRAY234, (int) 3)); |
| assertEquals(2, Ints.lastIndexOf(ARRAY234, (int) 4)); |
| assertEquals(3, Ints.lastIndexOf(new int[] {(int) 2, (int) 3, (int) 2, (int) 3}, (int) 3)); |
| } |
| |
| @GwtIncompatible |
| public void testMax_noArgs() { |
| try { |
| Ints.max(); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testMax() { |
| assertEquals(LEAST, Ints.max(LEAST)); |
| assertEquals(GREATEST, Ints.max(GREATEST)); |
| assertEquals((int) 9, Ints.max((int) 8, (int) 6, (int) 7, (int) 5, (int) 3, (int) 0, (int) 9)); |
| } |
| |
| @GwtIncompatible |
| public void testMin_noArgs() { |
| try { |
| Ints.min(); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testMin() { |
| assertEquals(LEAST, Ints.min(LEAST)); |
| assertEquals(GREATEST, Ints.min(GREATEST)); |
| assertEquals((int) 0, Ints.min((int) 8, (int) 6, (int) 7, (int) 5, (int) 3, (int) 0, (int) 9)); |
| } |
| |
| public void testConstrainToRange() { |
| assertEquals((int) 1, Ints.constrainToRange((int) 1, (int) 0, (int) 5)); |
| assertEquals((int) 1, Ints.constrainToRange((int) 1, (int) 1, (int) 5)); |
| assertEquals((int) 3, Ints.constrainToRange((int) 1, (int) 3, (int) 5)); |
| assertEquals((int) -1, Ints.constrainToRange((int) 0, (int) -5, (int) -1)); |
| assertEquals((int) 2, Ints.constrainToRange((int) 5, (int) 2, (int) 2)); |
| try { |
| Ints.constrainToRange((int) 1, (int) 3, (int) 2); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testConcat() { |
| assertTrue(Arrays.equals(EMPTY, Ints.concat())); |
| assertTrue(Arrays.equals(EMPTY, Ints.concat(EMPTY))); |
| assertTrue(Arrays.equals(EMPTY, Ints.concat(EMPTY, EMPTY, EMPTY))); |
| assertTrue(Arrays.equals(ARRAY1, Ints.concat(ARRAY1))); |
| assertNotSame(ARRAY1, Ints.concat(ARRAY1)); |
| assertTrue(Arrays.equals(ARRAY1, Ints.concat(EMPTY, ARRAY1, EMPTY))); |
| assertTrue( |
| Arrays.equals(new int[] {(int) 1, (int) 1, (int) 1}, Ints.concat(ARRAY1, ARRAY1, ARRAY1))); |
| assertTrue( |
| Arrays.equals( |
| new int[] {(int) 1, (int) 2, (int) 3, (int) 4}, Ints.concat(ARRAY1, ARRAY234))); |
| } |
| |
| public void testToByteArray() { |
| assertTrue(Arrays.equals(new byte[] {0x12, 0x13, 0x14, 0x15}, Ints.toByteArray(0x12131415))); |
| assertTrue( |
| Arrays.equals( |
| new byte[] {(byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC}, |
| Ints.toByteArray(0xFFEEDDCC))); |
| } |
| |
| public void testFromByteArray() { |
| assertEquals(0x12131415, Ints.fromByteArray(new byte[] {0x12, 0x13, 0x14, 0x15, 0x33})); |
| assertEquals( |
| 0xFFEEDDCC, |
| Ints.fromByteArray(new byte[] {(byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC})); |
| } |
| |
| public void testFromByteArrayFails() { |
| try { |
| Ints.fromByteArray(new byte[Ints.BYTES - 1]); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testFromBytes() { |
| assertEquals(0x12131415, Ints.fromBytes((byte) 0x12, (byte) 0x13, (byte) 0x14, (byte) 0x15)); |
| assertEquals(0xFFEEDDCC, Ints.fromBytes((byte) 0xFF, (byte) 0xEE, (byte) 0xDD, (byte) 0xCC)); |
| } |
| |
| public void testByteArrayRoundTrips() { |
| Random r = new Random(5); |
| byte[] b = new byte[Ints.BYTES]; |
| |
| // total overkill, but, it takes 0.1 sec so why not... |
| for (int i = 0; i < 10000; i++) { |
| int num = r.nextInt(); |
| assertEquals(num, Ints.fromByteArray(Ints.toByteArray(num))); |
| |
| r.nextBytes(b); |
| assertTrue(Arrays.equals(b, Ints.toByteArray(Ints.fromByteArray(b)))); |
| } |
| } |
| |
| public void testEnsureCapacity() { |
| assertSame(EMPTY, Ints.ensureCapacity(EMPTY, 0, 1)); |
| assertSame(ARRAY1, Ints.ensureCapacity(ARRAY1, 0, 1)); |
| assertSame(ARRAY1, Ints.ensureCapacity(ARRAY1, 1, 1)); |
| assertTrue( |
| Arrays.equals(new int[] {(int) 1, (int) 0, (int) 0}, Ints.ensureCapacity(ARRAY1, 2, 1))); |
| } |
| |
| public void testEnsureCapacity_fail() { |
| try { |
| Ints.ensureCapacity(ARRAY1, -1, 1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| try { |
| // notice that this should even fail when no growth was needed |
| Ints.ensureCapacity(ARRAY1, 1, -1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testJoin() { |
| assertEquals("", Ints.join(",", EMPTY)); |
| assertEquals("1", Ints.join(",", ARRAY1)); |
| assertEquals("1,2", Ints.join(",", (int) 1, (int) 2)); |
| assertEquals("123", Ints.join("", (int) 1, (int) 2, (int) 3)); |
| } |
| |
| public void testLexicographicalComparator() { |
| List<int[]> ordered = |
| Arrays.asList( |
| new int[] {}, |
| new int[] {LEAST}, |
| new int[] {LEAST, LEAST}, |
| new int[] {LEAST, (int) 1}, |
| new int[] {(int) 1}, |
| new int[] {(int) 1, LEAST}, |
| new int[] {GREATEST, GREATEST - (int) 1}, |
| new int[] {GREATEST, GREATEST}, |
| new int[] {GREATEST, GREATEST, GREATEST}); |
| |
| Comparator<int[]> comparator = Ints.lexicographicalComparator(); |
| Helpers.testComparator(comparator, ordered); |
| } |
| |
| @GwtIncompatible // SerializableTester |
| public void testLexicographicalComparatorSerializable() { |
| Comparator<int[]> comparator = Ints.lexicographicalComparator(); |
| assertSame(comparator, SerializableTester.reserialize(comparator)); |
| } |
| |
| public void testReverse() { |
| testReverse(new int[] {}, new int[] {}); |
| testReverse(new int[] {1}, new int[] {1}); |
| testReverse(new int[] {1, 2}, new int[] {2, 1}); |
| testReverse(new int[] {3, 1, 1}, new int[] {1, 1, 3}); |
| testReverse(new int[] {-1, 1, -2, 2}, new int[] {2, -2, 1, -1}); |
| } |
| |
| private static void testReverse(int[] input, int[] expectedOutput) { |
| input = Arrays.copyOf(input, input.length); |
| Ints.reverse(input); |
| assertTrue(Arrays.equals(expectedOutput, input)); |
| } |
| |
| private static void testReverse(int[] input, int fromIndex, int toIndex, int[] expectedOutput) { |
| input = Arrays.copyOf(input, input.length); |
| Ints.reverse(input, fromIndex, toIndex); |
| assertTrue(Arrays.equals(expectedOutput, input)); |
| } |
| |
| public void testReverseIndexed() { |
| testReverse(new int[] {}, 0, 0, new int[] {}); |
| testReverse(new int[] {1}, 0, 1, new int[] {1}); |
| testReverse(new int[] {1, 2}, 0, 2, new int[] {2, 1}); |
| testReverse(new int[] {3, 1, 1}, 0, 2, new int[] {1, 3, 1}); |
| testReverse(new int[] {3, 1, 1}, 0, 1, new int[] {3, 1, 1}); |
| testReverse(new int[] {-1, 1, -2, 2}, 1, 3, new int[] {-1, -2, 1, 2}); |
| } |
| |
| public void testSortDescending() { |
| testSortDescending(new int[] {}, new int[] {}); |
| testSortDescending(new int[] {1}, new int[] {1}); |
| testSortDescending(new int[] {1, 2}, new int[] {2, 1}); |
| testSortDescending(new int[] {1, 3, 1}, new int[] {3, 1, 1}); |
| testSortDescending(new int[] {-1, 1, -2, 2}, new int[] {2, 1, -1, -2}); |
| } |
| |
| private static void testSortDescending(int[] input, int[] expectedOutput) { |
| input = Arrays.copyOf(input, input.length); |
| Ints.sortDescending(input); |
| assertTrue(Arrays.equals(expectedOutput, input)); |
| } |
| |
| private static void testSortDescending( |
| int[] input, int fromIndex, int toIndex, int[] expectedOutput) { |
| input = Arrays.copyOf(input, input.length); |
| Ints.sortDescending(input, fromIndex, toIndex); |
| assertTrue(Arrays.equals(expectedOutput, input)); |
| } |
| |
| public void testSortDescendingIndexed() { |
| testSortDescending(new int[] {}, 0, 0, new int[] {}); |
| testSortDescending(new int[] {1}, 0, 1, new int[] {1}); |
| testSortDescending(new int[] {1, 2}, 0, 2, new int[] {2, 1}); |
| testSortDescending(new int[] {1, 3, 1}, 0, 2, new int[] {3, 1, 1}); |
| testSortDescending(new int[] {1, 3, 1}, 0, 1, new int[] {1, 3, 1}); |
| testSortDescending(new int[] {-1, -2, 1, 2}, 1, 3, new int[] {-1, 1, -2, 2}); |
| } |
| |
| @GwtIncompatible // SerializableTester |
| public void testStringConverterSerialization() { |
| SerializableTester.reserializeAndAssert(Ints.stringConverter()); |
| } |
| |
| public void testToArray() { |
| // need explicit type parameter to avoid javac warning!? |
| List<Integer> none = Arrays.<Integer>asList(); |
| assertTrue(Arrays.equals(EMPTY, Ints.toArray(none))); |
| |
| List<Integer> one = Arrays.asList((int) 1); |
| assertTrue(Arrays.equals(ARRAY1, Ints.toArray(one))); |
| |
| int[] array = {(int) 0, (int) 1, (int) 0xdeadbeef}; |
| |
| List<Integer> three = Arrays.asList((int) 0, (int) 1, (int) 0xdeadbeef); |
| assertTrue(Arrays.equals(array, Ints.toArray(three))); |
| |
| assertTrue(Arrays.equals(array, Ints.toArray(Ints.asList(array)))); |
| } |
| |
| public void testToArray_threadSafe() { |
| for (int delta : new int[] {+1, 0, -1}) { |
| for (int i = 0; i < VALUES.length; i++) { |
| List<Integer> list = Ints.asList(VALUES).subList(0, i); |
| Collection<Integer> misleadingSize = Helpers.misleadingSizeCollection(delta); |
| misleadingSize.addAll(list); |
| int[] arr = Ints.toArray(misleadingSize); |
| assertEquals(i, arr.length); |
| for (int j = 0; j < i; j++) { |
| assertEquals(VALUES[j], arr[j]); |
| } |
| } |
| } |
| } |
| |
| public void testToArray_withNull() { |
| List<Integer> list = Arrays.asList((int) 0, (int) 1, null); |
| try { |
| Ints.toArray(list); |
| fail(); |
| } catch (NullPointerException expected) { |
| } |
| } |
| |
| public void testToArray_withConversion() { |
| int[] array = {0, 1, 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, Ints.toArray(bytes))); |
| assertTrue(Arrays.equals(array, Ints.toArray(shorts))); |
| assertTrue(Arrays.equals(array, Ints.toArray(ints))); |
| assertTrue(Arrays.equals(array, Ints.toArray(floats))); |
| assertTrue(Arrays.equals(array, Ints.toArray(longs))); |
| assertTrue(Arrays.equals(array, Ints.toArray(doubles))); |
| } |
| |
| public void testAsList_isAView() { |
| int[] array = {(int) 0, (int) 1}; |
| List<Integer> list = Ints.asList(array); |
| list.set(0, (int) 2); |
| assertTrue(Arrays.equals(new int[] {(int) 2, (int) 1}, array)); |
| array[1] = (int) 3; |
| assertEquals(Arrays.asList((int) 2, (int) 3), list); |
| } |
| |
| public void testAsList_toArray_roundTrip() { |
| int[] array = {(int) 0, (int) 1, (int) 2}; |
| List<Integer> list = Ints.asList(array); |
| int[] newArray = Ints.toArray(list); |
| |
| // Make sure it returned a copy |
| list.set(0, (int) 4); |
| assertTrue(Arrays.equals(new int[] {(int) 0, (int) 1, (int) 2}, newArray)); |
| newArray[1] = (int) 5; |
| assertEquals((int) 1, (int) list.get(1)); |
| } |
| |
| // This test stems from a real bug found by andrewk |
| public void testAsList_subList_toArray_roundTrip() { |
| int[] array = {(int) 0, (int) 1, (int) 2, (int) 3}; |
| List<Integer> list = Ints.asList(array); |
| assertTrue(Arrays.equals(new int[] {(int) 1, (int) 2}, Ints.toArray(list.subList(1, 3)))); |
| assertTrue(Arrays.equals(new int[] {}, Ints.toArray(list.subList(2, 2)))); |
| } |
| |
| public void testAsListEmpty() { |
| assertSame(Collections.emptyList(), Ints.asList(EMPTY)); |
| } |
| |
| @GwtIncompatible // NullPointerTester |
| public void testNulls() { |
| new NullPointerTester().testAllPublicStaticMethods(Ints.class); |
| } |
| |
| public void testStringConverter_convert() { |
| Converter<String, Integer> converter = Ints.stringConverter(); |
| assertEquals((Integer) 1, converter.convert("1")); |
| assertEquals((Integer) 0, converter.convert("0")); |
| assertEquals((Integer) (-1), converter.convert("-1")); |
| assertEquals((Integer) 255, converter.convert("0xff")); |
| assertEquals((Integer) 255, converter.convert("0xFF")); |
| assertEquals((Integer) (-255), converter.convert("-0xFF")); |
| assertEquals((Integer) 255, converter.convert("#0000FF")); |
| assertEquals((Integer) 438, converter.convert("0666")); |
| } |
| |
| public void testStringConverter_convertError() { |
| try { |
| Ints.stringConverter().convert("notanumber"); |
| fail(); |
| } catch (NumberFormatException expected) { |
| } |
| } |
| |
| public void testStringConverter_nullConversions() { |
| assertNull(Ints.stringConverter().convert(null)); |
| assertNull(Ints.stringConverter().reverse().convert(null)); |
| } |
| |
| public void testStringConverter_reverse() { |
| Converter<String, Integer> converter = Ints.stringConverter(); |
| assertEquals("1", converter.reverse().convert(1)); |
| assertEquals("0", converter.reverse().convert(0)); |
| assertEquals("-1", converter.reverse().convert(-1)); |
| assertEquals("255", converter.reverse().convert(0xff)); |
| assertEquals("255", converter.reverse().convert(0xFF)); |
| assertEquals("-255", converter.reverse().convert(-0xFF)); |
| assertEquals("438", converter.reverse().convert(0666)); |
| } |
| |
| @GwtIncompatible // NullPointerTester |
| public void testStringConverter_nullPointerTester() throws Exception { |
| NullPointerTester tester = new NullPointerTester(); |
| tester.testAllPublicInstanceMethods(Ints.stringConverter()); |
| } |
| |
| public void testTryParse() { |
| tryParseAndAssertEquals(0, "0"); |
| tryParseAndAssertEquals(0, "-0"); |
| tryParseAndAssertEquals(1, "1"); |
| tryParseAndAssertEquals(-1, "-1"); |
| tryParseAndAssertEquals(8900, "8900"); |
| tryParseAndAssertEquals(-8900, "-8900"); |
| tryParseAndAssertEquals(GREATEST, Integer.toString(GREATEST)); |
| tryParseAndAssertEquals(LEAST, Integer.toString(LEAST)); |
| assertNull(Ints.tryParse("")); |
| assertNull(Ints.tryParse("-")); |
| assertNull(Ints.tryParse("+1")); |
| assertNull(Ints.tryParse("9999999999999999")); |
| assertNull("Max integer + 1", Ints.tryParse(Long.toString(((long) GREATEST) + 1))); |
| assertNull("Max integer * 10", Ints.tryParse(Long.toString(((long) GREATEST) * 10))); |
| assertNull("Min integer - 1", Ints.tryParse(Long.toString(((long) LEAST) - 1))); |
| assertNull("Min integer * 10", Ints.tryParse(Long.toString(((long) LEAST) * 10))); |
| assertNull("Max long", Ints.tryParse(Long.toString(Long.MAX_VALUE))); |
| assertNull("Min long", Ints.tryParse(Long.toString(Long.MIN_VALUE))); |
| assertNull(Ints.tryParse("\u0662\u06f3")); |
| } |
| |
| /** |
| * Applies {@link Ints#tryParse(String)} to the given string and asserts that the result is as |
| * expected. |
| */ |
| private static void tryParseAndAssertEquals(Integer expected, String value) { |
| assertEquals(expected, Ints.tryParse(value)); |
| } |
| |
| public void testTryParse_radix() { |
| for (int radix = Character.MIN_RADIX; radix <= Character.MAX_RADIX; radix++) { |
| radixEncodeParseAndAssertEquals(0, radix); |
| radixEncodeParseAndAssertEquals(8000, radix); |
| radixEncodeParseAndAssertEquals(-8000, radix); |
| radixEncodeParseAndAssertEquals(GREATEST, radix); |
| radixEncodeParseAndAssertEquals(LEAST, radix); |
| assertNull("Radix: " + radix, Ints.tryParse("9999999999999999", radix)); |
| assertNull( |
| "Radix: " + radix, Ints.tryParse(Long.toString((long) GREATEST + 1, radix), radix)); |
| assertNull("Radix: " + radix, Ints.tryParse(Long.toString((long) LEAST - 1, radix), radix)); |
| } |
| assertNull("Hex string and dec parm", Ints.tryParse("FFFF", 10)); |
| assertEquals("Mixed hex case", 65535, (int) Ints.tryParse("ffFF", 16)); |
| } |
| |
| /** |
| * Encodes the an integer as a string with given radix, then uses {@link Ints#tryParse(String, |
| * int)} to parse the result. Asserts the result is the same as what we started with. |
| */ |
| private static void radixEncodeParseAndAssertEquals(Integer value, int radix) { |
| assertEquals("Radix: " + radix, value, Ints.tryParse(Integer.toString(value, radix), radix)); |
| } |
| |
| public void testTryParse_radixTooBig() { |
| try { |
| Ints.tryParse("0", Character.MAX_RADIX + 1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testTryParse_radixTooSmall() { |
| try { |
| Ints.tryParse("0", Character.MIN_RADIX - 1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testTryParse_withNullGwt() { |
| assertNull(Ints.tryParse("null")); |
| try { |
| Ints.tryParse(null); |
| fail("Expected NPE"); |
| } catch (NullPointerException expected) { |
| } |
| } |
| } |