| /* |
| * Copyright (C) 2011 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package libcore.java.util; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.ListIterator; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| import java.util.Spliterator; |
| |
| import junit.framework.TestCase; |
| |
| public final class CollectionsTest extends TestCase { |
| |
| private static final Object NOT_A_STRING = new Object(); |
| private static final Object A_STRING = "string"; |
| |
| public void testEmptyEnumeration() { |
| Enumeration<Object> e = Collections.emptyEnumeration(); |
| assertFalse(e instanceof Serializable); |
| assertFalse(e.hasMoreElements()); |
| try { |
| e.nextElement(); |
| fail(); |
| } catch (NoSuchElementException expected) { |
| } |
| } |
| |
| public void testEmptyIterator() { |
| testEmptyIterator(Collections.emptyIterator()); |
| testEmptyIterator(Collections.emptyList().iterator()); |
| testEmptyIterator(Collections.emptySet().iterator()); |
| testEmptyIterator(Collections.emptyMap().keySet().iterator()); |
| testEmptyIterator(Collections.emptyMap().entrySet().iterator()); |
| testEmptyIterator(Collections.emptyMap().values().iterator()); |
| } |
| |
| private void testEmptyIterator(Iterator<?> i) { |
| assertFalse(i instanceof Serializable); |
| assertFalse(i.hasNext()); |
| try { |
| i.next(); |
| fail(); |
| } catch (NoSuchElementException expected) { |
| } |
| try { |
| i.remove(); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| } |
| |
| public void testEmptyListIterator() { |
| testEmptyListIterator(Collections.emptyListIterator()); |
| testEmptyListIterator(Collections.emptyList().listIterator()); |
| testEmptyListIterator(Collections.emptyList().listIterator(0)); |
| } |
| |
| private void testEmptyListIterator(ListIterator<?> i) { |
| assertFalse(i instanceof Serializable); |
| assertFalse(i.hasNext()); |
| assertFalse(i.hasPrevious()); |
| assertEquals(0, i.nextIndex()); |
| try { |
| i.next(); |
| fail(); |
| } catch (NoSuchElementException expected) { |
| } |
| assertEquals(-1, i.previousIndex()); |
| try { |
| i.previous(); |
| fail(); |
| } catch (NoSuchElementException expected) { |
| } |
| try { |
| i.add(null); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| try { |
| i.remove(); |
| fail(); |
| } catch (IllegalStateException expected) { |
| } |
| } |
| |
| public static final class ArrayListInheritor<T> extends ArrayList<T> { |
| public ArrayListInheritor(int capacity) { |
| super(capacity); |
| } |
| } |
| |
| public void testSort_leavesModcountUnmodified() { |
| // This tests the fast path for ArrayLists where we can get away without |
| // a copy. |
| ArrayList<String> list = new ArrayList<String>(16); |
| list.add("coven"); |
| list.add("asylum"); |
| list.add("murder house"); |
| list.add("freak show"); |
| |
| Iterator<String> it = list.iterator(); |
| it.next(); |
| Collections.sort(list); |
| it.next(); |
| |
| list = new ArrayListInheritor<String>(16); |
| list.add("apples"); |
| list.add("oranges"); |
| list.add("pineapples"); |
| list.add("bacon"); |
| |
| it = list.iterator(); |
| it.next(); |
| Collections.sort(list); |
| it.next(); |
| } |
| |
| /** |
| * A value type whose {@code compareTo} method returns one of {@code 0}, |
| * {@code Integer.MIN_VALUE} and {@code Integer.MAX_VALUE}. |
| */ |
| static final class IntegerWithExtremeComparator |
| implements Comparable<IntegerWithExtremeComparator> { |
| private final int value; |
| |
| public IntegerWithExtremeComparator(int value) { |
| this.value = value; |
| } |
| |
| @Override |
| public int compareTo(IntegerWithExtremeComparator another) { |
| if (another.value == this.value) { |
| return 0; |
| } else if (another.value > this.value) { |
| return Integer.MIN_VALUE; |
| } else { |
| return Integer.MAX_VALUE; |
| } |
| } |
| } |
| |
| // http://b/19749094 |
| public void testBinarySearch_comparatorThatReturnsMinAndMaxValue() { |
| ArrayList<Integer> list = new ArrayList<Integer>(16); |
| list.add(4); |
| list.add(9); |
| list.add(11); |
| list.add(14); |
| list.add(16); |
| |
| int index = Collections.binarySearch(list, 9, new Comparator<Integer>() { |
| @Override |
| public int compare(Integer lhs, Integer rhs) { |
| final int compare = lhs.compareTo(rhs); |
| if (compare == 0) { |
| return 0; |
| } else if (compare < 0) { |
| return Integer.MIN_VALUE; |
| } else { |
| return Integer.MAX_VALUE; |
| } |
| } |
| }); |
| assertEquals(1, index); |
| |
| ArrayList<IntegerWithExtremeComparator> list2 = |
| new ArrayList<IntegerWithExtremeComparator>(); |
| list2.add(new IntegerWithExtremeComparator(4)); |
| list2.add(new IntegerWithExtremeComparator(9)); |
| list2.add(new IntegerWithExtremeComparator(11)); |
| list2.add(new IntegerWithExtremeComparator(14)); |
| list2.add(new IntegerWithExtremeComparator(16)); |
| |
| assertEquals(1, Collections.binarySearch(list2, new IntegerWithExtremeComparator(9))); |
| } |
| |
| public void testBinarySearch_emptyCollection() { |
| assertEquals(-1, Collections.binarySearch(new ArrayList<Integer>(), 9)); |
| |
| assertEquals(-1, Collections.binarySearch(new ArrayList<>(), 9, Integer::compareTo)); |
| } |
| |
| public void testSingletonSpliterator() { |
| Spliterator<String> sp = Collections.singletonList("spiff").spliterator(); |
| |
| assertEquals(1, sp.estimateSize()); |
| assertEquals(1, sp.getExactSizeIfKnown()); |
| assertNull(sp.trySplit()); |
| assertEquals(true, sp.tryAdvance(value -> assertEquals("spiff", value))); |
| assertEquals(false, sp.tryAdvance(value -> fail())); |
| } |
| |
| public void test_unmodifiableMap_getOrDefault() { |
| HashMap<Integer, Double> hashMap = new HashMap<>(); |
| hashMap.put(2, 12.0); |
| hashMap.put(3, null); |
| Map<Integer, Double> m = Collections.unmodifiableMap(hashMap); |
| assertEquals(-1.0, m.getOrDefault(1, -1.0)); |
| assertEquals(12.0, m.getOrDefault(2, -1.0)); |
| assertEquals(null, m.getOrDefault(3, -1.0)); |
| } |
| |
| public void test_unmodifiableMap_forEach() { |
| Map<Integer, Double> hashMap = new HashMap<>(); |
| Map<Integer, Double> replica = new HashMap<>(); |
| hashMap.put(1, 10.0); |
| hashMap.put(2, 20.0); |
| Collections.unmodifiableMap(hashMap).forEach(replica::put); |
| assertEquals(10.0, replica.get(1)); |
| assertEquals(20.0, replica.get(2)); |
| assertEquals(2, replica.size()); |
| } |
| |
| public void test_unmodifiableMap_putIfAbsent() { |
| try { |
| Collections.unmodifiableMap(new HashMap<>()).putIfAbsent(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // For existing key |
| HashMap<Integer, Double> m = new HashMap<>(); |
| m.put(1, 5.0); |
| try { |
| Collections.unmodifiableMap(m).putIfAbsent(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_unmodifiableMap_remove() { |
| try { |
| Collections.unmodifiableMap(new HashMap<>()).remove(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // For existing key |
| HashMap<Integer, Double> m = new HashMap<>(); |
| m.put(1, 5.0); |
| try { |
| Collections.unmodifiableMap(m).remove(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_unmodifiableMap_replace$K$V$V() { |
| try { |
| Collections.unmodifiableMap(new HashMap<>()).replace(1, 5.0, 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // For existing key |
| HashMap<Integer, Double> m = new HashMap<>(); |
| m.put(1, 5.0); |
| try { |
| Collections.unmodifiableMap(m).replace(1, 5.0, 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_unmodifiableMap_replace$K$V() { |
| try { |
| Collections.unmodifiableMap(new HashMap<>()).replace(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // For existing key |
| HashMap<Integer, Double> m = new HashMap<>(); |
| m.put(1, 5.0); |
| try { |
| Collections.unmodifiableMap(m).replace(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_unmodifiableMap_computeIfAbsent() { |
| try { |
| Collections.unmodifiableMap(new HashMap<>()).computeIfAbsent(1, k -> 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // For existing key |
| HashMap<Integer, Double> m = new HashMap<>(); |
| m.put(1, 5.0); |
| try { |
| Collections.unmodifiableMap(m).computeIfAbsent(1, k -> 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_unmodifiableMap_computeIfPresent() { |
| try { |
| Collections.unmodifiableMap(new HashMap<>()).computeIfPresent(1, (k, v) -> 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // For existing key |
| HashMap<Integer, Double> m = new HashMap<>(); |
| m.put(1, 5.0); |
| try { |
| Collections.unmodifiableMap(m).computeIfPresent(1, (k, v) -> 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_unmodifiableMap_compute() { |
| try { |
| Collections.unmodifiableMap(new HashMap<>()).compute(1, (k, v) -> 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // For existing key |
| HashMap<Integer, Double> m = new HashMap<>(); |
| m.put(1, 5.0); |
| try { |
| Collections.unmodifiableMap(m).compute(1, (k, v) -> 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_unmodifiableMap_merge() { |
| try { |
| Collections.unmodifiableMap(new HashMap<>()).merge(1, 2.0, (k, v) -> 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // For existing key |
| HashMap<Integer, Double> m = new HashMap<>(); |
| m.put(1, 5.0); |
| try { |
| Collections.unmodifiableMap(m).merge(1, 2.0, (k, v) -> 1.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_getOrDefault() { |
| Map<Integer, Double> m = Collections.emptyMap(); |
| assertEquals(-1.0, m.getOrDefault(1, -1.0)); |
| assertEquals(-1.0, m.getOrDefault(2, -1.0)); |
| } |
| |
| public void test_EmptyMap_forEach() { |
| try { |
| Collections.emptyMap().forEach(null); |
| fail(); |
| } catch (NullPointerException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_putIfAbsent() { |
| try { |
| Collections.emptyMap().putIfAbsent(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_remove() { |
| try { |
| Collections.emptyMap().remove(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_replace$K$V$V() { |
| try { |
| Collections.emptyMap().replace(1, 5.0, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_replace$K$V() { |
| try { |
| Collections.emptyMap().replace(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_computeIfAbsent() { |
| try { |
| Collections.emptyMap().computeIfAbsent(1, k -> 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_computeIfPresent() { |
| try { |
| Collections.emptyMap().computeIfPresent(1, (k, v) -> 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_compute() { |
| try { |
| Collections.emptyMap().compute(1, (k, v) -> 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_EmptyMap_merge() { |
| try { |
| Collections.emptyMap().merge(1, 5.0, (k, v) -> 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonMap_getOrDefault() { |
| Map<Integer, Double> m = Collections.singletonMap(1, 11.0); |
| assertEquals(11.0, m.getOrDefault(1, -1.0)); |
| assertEquals(-1.0, m.getOrDefault(2, -1.0)); |
| } |
| |
| public void test_SingletonMap_forEach() { |
| Map<Integer, Double> m = new HashMap<>(); |
| Collections.singletonMap(1, 11.0).forEach(m::put); |
| assertEquals(11.0, m.getOrDefault(1, -1.0)); |
| assertEquals(1, m.size()); |
| } |
| |
| public void test_SingletonMap_putIfAbsent() { |
| try { |
| Collections.singletonMap(1, 11.0).putIfAbsent(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonMap_remove() { |
| try { |
| Collections.singletonMap(1, 11.0).remove(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonMap_replace$K$V$V() { |
| try { |
| Collections.singletonMap(1, 11.0).replace(1, 5.0, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonMap_replace$K$V() { |
| try { |
| Collections.singletonMap(1, 11.0).replace(1, 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonMap_computeIfAbsent() { |
| try { |
| Collections.singletonMap(1, 11.0).computeIfAbsent(1, k -> 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonMap_computeIfPresent() { |
| try { |
| Collections.singletonMap(1, 11.0).computeIfPresent(1, (k, v) -> 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonMap_compute() { |
| try { |
| Collections.singletonMap(1, 11.0).compute(1, (k, v) -> 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonMap_merge() { |
| try { |
| Collections.singletonMap(1, 11.0).merge(1, 5.0, (k, v) -> 5.0); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SynchronizedList_replaceAll() { |
| ListDefaultMethodTester.test_replaceAll(Collections.synchronizedList(new ArrayList<>())); |
| } |
| |
| public void test_SynchronizedList_sort() { |
| ListDefaultMethodTester.test_sort(Collections.synchronizedList(new ArrayList<>())); |
| } |
| |
| public void test_CheckedList_replaceAll() { |
| ListDefaultMethodTester.test_replaceAll(Collections.checkedList(new ArrayList<>(), Integer.class)); |
| } |
| |
| public void test_CheckedList_sort() { |
| ListDefaultMethodTester.test_sort(Collections.checkedList(new ArrayList<>(), Double.class)); |
| } |
| |
| public void test_EmptyList_replaceAll() { |
| Collections.emptyList().replaceAll(k -> 1); |
| |
| try { |
| Collections.emptyList().replaceAll(null); |
| fail(); |
| } catch (NullPointerException expected) { |
| } |
| } |
| |
| public void test_EmptyList_sort() { |
| Collections.emptyList().sort((k1, k2) -> 1); |
| } |
| |
| public void test_unmodifiableList_replaceAll() { |
| try { |
| Collections.unmodifiableList(new ArrayList<>()).replaceAll(k -> 1); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // with non empty list |
| |
| try { |
| ArrayList l = new ArrayList(); |
| l.add(1); |
| l.add(2); |
| Collections.unmodifiableList(l).replaceAll(k -> 1); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_unmodifiableList_sort() { |
| try { |
| Collections.unmodifiableList(new ArrayList<>()).sort((k1, k2) -> 1); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| |
| // with non empty list |
| |
| try { |
| ArrayList l = new ArrayList(); |
| l.add(1); |
| l.add(2); |
| Collections.unmodifiableList(l).sort((k1, k2) -> 1); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonList_replaceAll() { |
| try { |
| Collections.singletonList(1).replaceAll(k -> 2); |
| fail(); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| |
| public void test_SingletonList_sort() { |
| Collections.singletonList(1).sort((k1, k2) -> 2); |
| } |
| |
| public void test_CheckedMap_replaceAll() { |
| Map<Integer, Integer> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Integer.class); |
| checkedMap.put(1, 10); |
| checkedMap.put(2, 20); |
| checkedMap.put(3, 30); |
| checkedMap.replaceAll((k, v) -> (Integer)k + (Integer)v); |
| assertEquals(11, checkedMap.get(1)); |
| assertEquals(22, checkedMap.get(2)); |
| assertEquals(33, checkedMap.get(3)); |
| assertEquals(3, checkedMap.size()); |
| } |
| |
| public void test_CheckedMap_putIfAbsent() { |
| Map<Integer, Double> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Double.class); |
| MapDefaultMethodTester.test_putIfAbsent(checkedMap, true /* acceptsNullKey */, |
| true /* acceptsNullValue */); |
| |
| // Without generics to check the typeCheck implementation |
| Map checkedMap2 = Collections.checkedMap(new HashMap<>(), Integer.class, String.class); |
| |
| // When key is present |
| checkedMap2.putIfAbsent(1, A_STRING); |
| try { |
| checkedMap2.putIfAbsent(1, NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| |
| // When key is absent |
| checkedMap2.clear(); |
| try { |
| checkedMap2.putIfAbsent(1, NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| } |
| |
| public void test_CheckedMap_remove() { |
| Map<Integer, Double> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Double.class); |
| MapDefaultMethodTester.test_remove(checkedMap, true /* acceptsNullKey */, |
| true /* acceptsNullValue */); |
| } |
| |
| public void test_CheckedMap_replace$K$V$V() { |
| Map<Integer, Double> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Double.class); |
| MapDefaultMethodTester.test_replace$K$V$V(checkedMap, true /* acceptsNullKey */, |
| true /* acceptsNullValue */); |
| |
| // Without generics to check the typeCheck implementation |
| Map checkedMap2 = Collections.checkedMap(new HashMap<>(), Integer.class, String.class); |
| checkedMap2.put(1, A_STRING); |
| |
| try { |
| checkedMap2.replace(1, NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| } |
| |
| public void test_CheckedMap_replace$K$V() { |
| Map<Integer, Double> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Double.class); |
| MapDefaultMethodTester.test_replace$K$V(checkedMap, true /* acceptsNullKey */, |
| true /* acceptsNullValue */); |
| |
| // Without generics to check the typeCheck implementation |
| Map checkedMap2 = Collections.checkedMap(new HashMap<>(), Integer.class, String.class); |
| checkedMap2.put(1, A_STRING); |
| |
| try { |
| checkedMap2.replace(1, 1, NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| } |
| |
| public void test_CheckedMap_computeIfAbsent() { |
| Map<Integer, Double> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Double.class); |
| MapDefaultMethodTester.test_computeIfAbsent(checkedMap, true /* acceptsNullKey */, |
| true /* acceptsNullValue */); |
| |
| // Without generics to check the typeCheck implementation |
| Map checkedMap2 = Collections.checkedMap(new HashMap<>(), Integer.class, String.class); |
| checkedMap2.put(1, A_STRING); |
| |
| // When key is present |
| try { |
| checkedMap2.computeIfAbsent(1, k -> NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| |
| // When key is absent |
| checkedMap2.clear(); |
| try { |
| checkedMap2.computeIfAbsent(1, k -> NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| } |
| |
| public void test_CheckedMap_computeIfPresent() { |
| Map<Integer, Double> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Double.class); |
| MapDefaultMethodTester.test_computeIfPresent(checkedMap, true /* acceptsNullKey */); |
| |
| // Without generics to check the typeCheck implementation |
| Map m = new HashMap(); |
| Map checkedMap2 = Collections.checkedMap(m, Integer.class, String.class); |
| checkedMap2.put(1, A_STRING); |
| |
| try { |
| checkedMap2.computeIfPresent(1, (k, v) -> NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| } |
| |
| public void test_CheckedMap_compute() { |
| Map<Integer, Double> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Double.class); |
| MapDefaultMethodTester.test_compute(checkedMap, true /* acceptsNullKey */); |
| |
| Map checkedMap2 = Collections.checkedMap(new HashMap(), Integer.class, String.class); |
| checkedMap2.put(1, A_STRING); |
| try { |
| checkedMap2.compute(1, (k, v) -> NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| } |
| |
| public void test_CheckedMap_merge() { |
| Map<Integer, Double> map = new HashMap<>(); |
| Map checkedMap = Collections.checkedMap(map, Integer.class, Double.class); |
| MapDefaultMethodTester.test_merge(checkedMap, true /* acceptsNullKey */); |
| |
| // Without generics to check the typeCheck implementation |
| Map checkedMap2 = |
| Collections.checkedMap(new HashMap<>(), Integer.class, String.class); |
| checkedMap2.put(1, A_STRING); |
| |
| try { |
| checkedMap2.merge(1, A_STRING, (v1, v2) -> NOT_A_STRING); |
| } catch (ClassCastException expected) {} |
| } |
| } |