J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @test |
| 26 | * @bug 6409434 |
| 27 | * @summary Test behavior of nulls in checked collections |
| 28 | */ |
| 29 | |
| 30 | import java.util.*; |
| 31 | import static java.util.Collections.*; |
| 32 | |
| 33 | @SuppressWarnings({"unchecked","serial"}) |
| 34 | public class CheckedNull { |
| 35 | |
| 36 | void test(String[] args) throws Throwable { |
| 37 | testCollection(Collections.checkedCollection( |
| 38 | new ArrayList<String>(), String.class)); |
| 39 | testCollection(Collections.checkedList( |
| 40 | new ArrayList<String>(), String.class)); |
| 41 | testCollection(Collections.checkedSet( |
| 42 | new HashSet<String>(), String.class)); |
| 43 | |
| 44 | final Comparator nullLow = new Comparator() { |
| 45 | public int compare(Object x, Object y) { |
| 46 | return x == y ? 0 : |
| 47 | x == null ? -1 : |
| 48 | y == null ? 1 : |
| 49 | ((Comparable)x).compareTo(y); }}; |
| 50 | testCollection(Collections.checkedSortedSet( |
| 51 | new TreeSet<String>(nullLow), String.class)); |
| 52 | |
| 53 | testMap(Collections.checkedMap( |
| 54 | new HashMap<String, String>(), |
| 55 | String.class, String.class));; |
| 56 | } |
| 57 | |
| 58 | ClassCastException cce(F f) { |
| 59 | try { f.f(); fail(); return null; } |
| 60 | catch (ClassCastException cce) { pass(); return cce; } |
| 61 | catch (Throwable t) { unexpected(t); return null; } |
| 62 | } |
| 63 | |
| 64 | void equalCCE(F ... fs) { |
| 65 | String detailMessage = null; |
| 66 | for (F f : fs) |
| 67 | if (detailMessage == null) |
| 68 | detailMessage = cce(f).getMessage(); |
| 69 | else |
| 70 | equal(detailMessage, cce(f).getMessage()); |
| 71 | } |
| 72 | |
| 73 | void add(Collection c, Object o) { |
| 74 | int s = c.size(); |
| 75 | check(! c.contains(o)); |
| 76 | check(c.add(o)); |
| 77 | check(c.contains(o)); |
| 78 | equal(c.size(), s+1); |
| 79 | check(c.remove(o)); |
| 80 | check(! c.contains(o)); |
| 81 | check(c.addAll(singleton(o))); |
| 82 | check(c.contains(o)); |
| 83 | equal(c.size(), s+1); |
| 84 | check(c.remove(o)); |
| 85 | equal(c.size(), s); |
| 86 | } |
| 87 | |
| 88 | void testCollection(final Collection c) { |
| 89 | try { |
| 90 | check(c.isEmpty()); |
| 91 | add(c, null); |
| 92 | add(c, "foo"); |
| 93 | |
| 94 | check(c.add("bar")); |
| 95 | add(c, null); |
| 96 | add(c, "foo"); |
| 97 | |
| 98 | equalCCE( |
| 99 | new F(){void f(){ c.add(1); }}, |
| 100 | new F(){void f(){ c.addAll(singleton(1)); }}); |
| 101 | |
| 102 | } catch (Throwable t) { unexpected(t); } |
| 103 | } |
| 104 | |
| 105 | void put(Map m, Object k, Object v) { |
| 106 | int s = m.size(); |
| 107 | check(! m.containsKey(k)); |
| 108 | check(! m.containsValue(v)); |
| 109 | equal(null, m.put(k, v)); |
| 110 | check(m.containsKey(k)); |
| 111 | check(m.containsValue(v)); |
| 112 | equal(m.size(), s+1); |
| 113 | equal(v, m.remove(k)); |
| 114 | check(! m.containsKey(k)); |
| 115 | check(! m.containsValue(v)); |
| 116 | m.putAll(singletonMap(k,v)); |
| 117 | check(m.containsKey(k)); |
| 118 | check(m.containsValue(v)); |
| 119 | equal(m.size(), s+1); |
| 120 | equal(v,m.remove(k)); |
| 121 | equal(m.size(), s); |
| 122 | } |
| 123 | |
| 124 | void testMap(final Map m) { |
| 125 | try { |
| 126 | check(m.isEmpty()); |
| 127 | |
| 128 | put(m, "foo", null); |
| 129 | put(m, null, "foo"); |
| 130 | put(m, null, null); |
| 131 | put(m, "foo", "bar"); |
| 132 | |
| 133 | m.put("a", "b"); |
| 134 | |
| 135 | put(m, "foo", null); |
| 136 | put(m, null, "foo"); |
| 137 | put(m, null, null); |
| 138 | put(m, "foo", "bar"); |
| 139 | |
| 140 | equalCCE( |
| 141 | new F(){void f(){ m.put(1, "foo"); }}, |
| 142 | new F(){void f(){ m.putAll(singletonMap(1, "foo")); }}); |
| 143 | |
| 144 | final Collection cheater = new ArrayList() { |
| 145 | public boolean contains(Object o) { |
| 146 | if (o instanceof Map.Entry) |
| 147 | ((Map.Entry)o).setValue(1); |
| 148 | return false; }}; |
| 149 | |
| 150 | equalCCE( |
| 151 | new F(){void f(){ m.put("foo", 1); }}, |
| 152 | new F(){void f(){ m.putAll(singletonMap("foo", 1)); }}, |
| 153 | new F(){void f(){ |
| 154 | ((Map.Entry)m.entrySet().iterator().next()).setValue(1); }}, |
| 155 | new F(){void f(){ |
| 156 | m.entrySet().removeAll(cheater);}}, |
| 157 | new F(){void f(){ |
| 158 | m.entrySet().retainAll(cheater);}}); |
| 159 | |
| 160 | equalCCE( |
| 161 | new F(){void f(){ m.put(3, 1); }}, |
| 162 | new F(){void f(){ m.putAll(singletonMap(3, 1)); }}); |
| 163 | |
| 164 | equal(m.size(), 1); |
| 165 | equal(m.keySet(), singleton("a")); |
| 166 | equal(m.entrySet(), |
| 167 | singleton(new AbstractMap.SimpleImmutableEntry("a","b"))); |
| 168 | |
| 169 | } catch (Throwable t) { unexpected(t); } |
| 170 | } |
| 171 | |
| 172 | //--------------------- Infrastructure --------------------------- |
| 173 | volatile int passed = 0, failed = 0; |
| 174 | void pass() {passed++;} |
| 175 | void fail() {failed++; Thread.dumpStack();} |
| 176 | void fail(String msg) {System.err.println(msg); fail();} |
| 177 | void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| 178 | void check(boolean cond) {if (cond) pass(); else fail();} |
| 179 | void equal(Object x, Object y) { |
| 180 | if (x == null ? y == null : x.equals(y)) pass(); |
| 181 | else fail(x + " not equal to " + y);} |
| 182 | public static void main(String[] args) throws Throwable { |
| 183 | new CheckedNull().instanceMain(args);} |
| 184 | void instanceMain(String[] args) throws Throwable { |
| 185 | try {test(args);} catch (Throwable t) {unexpected(t);} |
| 186 | System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed); |
| 187 | if (failed > 0) throw new AssertionError("Some tests failed");} |
| 188 | abstract class F {abstract void f() throws Throwable;} |
| 189 | } |