| /* |
| * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 6797535 6889858 6891113 8013712 8011800 8014365 |
| * @summary Basic tests for methods in java.util.Objects |
| * @author Joseph D. Darcy |
| */ |
| |
| import java.util.*; |
| import java.util.function.*; |
| |
| public class BasicObjectsTest { |
| public static void main(String... args) { |
| int errors = 0; |
| errors += testEquals(); |
| errors += testDeepEquals(); |
| errors += testHashCode(); |
| errors += testHash(); |
| errors += testToString(); |
| errors += testToString2(); |
| errors += testCompare(); |
| errors += testRequireNonNull(); |
| errors += testIsNull(); |
| errors += testNonNull(); |
| errors += testNonNullOf(); |
| if (errors > 0 ) |
| throw new RuntimeException(); |
| } |
| |
| private static int testEquals() { |
| int errors = 0; |
| Object[] values = {null, "42", 42}; |
| for(int i = 0; i < values.length; i++) |
| for(int j = 0; j < values.length; j++) { |
| boolean expected = (i == j); |
| Object a = values[i]; |
| Object b = values[j]; |
| boolean result = Objects.equals(a, b); |
| if (result != expected) { |
| errors++; |
| System.err.printf("When equating %s to %s, got %b instead of %b%n.", |
| a, b, result, expected); |
| } |
| } |
| return errors; |
| } |
| |
| private static int testDeepEquals() { |
| int errors = 0; |
| Object[] values = {null, |
| null, // Change to values later |
| new byte[] {(byte)1}, |
| new short[] {(short)1}, |
| new int[] {1}, |
| new long[] {1L}, |
| new char[] {(char)1}, |
| new float[] {1.0f}, |
| new double[]{1.0d}, |
| new String[]{"one"}}; |
| values[1] = values; |
| |
| for(int i = 0; i < values.length; i++) |
| for(int j = 0; j < values.length; j++) { |
| boolean expected = (i == j); |
| Object a = values[i]; |
| Object b = values[j]; |
| boolean result = Objects.deepEquals(a, b); |
| if (result != expected) { |
| errors++; |
| System.err.printf("When equating %s to %s, got %b instead of %b%n.", |
| a, b, result, expected); |
| } |
| } |
| |
| return errors; |
| } |
| |
| private static int testHashCode() { |
| int errors = 0; |
| errors += (Objects.hashCode(null) == 0 ) ? 0 : 1; |
| String s = "42"; |
| errors += (Objects.hashCode(s) == s.hashCode() ) ? 0 : 1; |
| return errors; |
| } |
| |
| private static int testHash() { |
| int errors = 0; |
| |
| Object[] data = new String[]{"perfect", "ham", "THC"}; |
| |
| errors += ((Objects.hash((Object[])null) == 0) ? 0 : 1); |
| |
| errors += (Objects.hash("perfect", "ham", "THC") == |
| Arrays.hashCode(data)) ? 0 : 1; |
| |
| return errors; |
| } |
| |
| private static int testToString() { |
| int errors = 0; |
| errors += ("null".equals(Objects.toString(null)) ) ? 0 : 1; |
| String s = "Some string"; |
| errors += (s.equals(Objects.toString(s)) ) ? 0 : 1; |
| return errors; |
| } |
| |
| private static int testToString2() { |
| int errors = 0; |
| String s = "not the default"; |
| errors += (s.equals(Objects.toString(null, s)) ) ? 0 : 1; |
| errors += (s.equals(Objects.toString(s, "another string")) ) ? 0 : 1; |
| return errors; |
| } |
| |
| private static int testCompare() { |
| int errors = 0; |
| String[] values = {"e. e. cummings", "zzz"}; |
| String[] VALUES = {"E. E. Cummings", "ZZZ"}; |
| errors += compareTest(null, null, 0); |
| for(int i = 0; i < values.length; i++) { |
| String a = values[i]; |
| errors += compareTest(a, a, 0); |
| for(int j = 0; j < VALUES.length; j++) { |
| int expected = Integer.compare(i, j); |
| String b = VALUES[j]; |
| errors += compareTest(a, b, expected); |
| } |
| } |
| return errors; |
| } |
| |
| private static int compareTest(String a, String b, int expected) { |
| int errors = 0; |
| int result = Objects.compare(a, b, String.CASE_INSENSITIVE_ORDER); |
| if (Integer.signum(result) != Integer.signum(expected)) { |
| errors++; |
| System.err.printf("When comparing %s to %s, got %d instead of %d%n.", |
| a, b, result, expected); |
| } |
| return errors; |
| } |
| |
| private static int testRequireNonNull() { |
| int errors = 0; |
| |
| final String RNN_1 = "1-arg requireNonNull"; |
| final String RNN_2 = "2-arg requireNonNull"; |
| final String RNN_3 = "Supplier requireNonNull"; |
| |
| Function<String, String> rnn1 = s -> Objects.requireNonNull(s); |
| Function<String, String> rnn2 = s -> Objects.requireNonNull(s, "trousers"); |
| Function<String, String> rnn3 = s -> Objects.requireNonNull(s, () -> "trousers"); |
| |
| errors += testRNN_NonNull(rnn1, RNN_1); |
| errors += testRNN_NonNull(rnn2, RNN_2); |
| errors += testRNN_NonNull(rnn3, RNN_3); |
| |
| errors += testRNN_Null(rnn1, RNN_1, null); |
| errors += testRNN_Null(rnn2, RNN_2, "trousers"); |
| errors += testRNN_Null(rnn3, RNN_3, "trousers"); |
| return errors; |
| } |
| |
| private static int testRNN_NonNull(Function<String, String> testFunc, |
| String testFuncName) { |
| int errors = 0; |
| try { |
| String s = testFunc.apply("pants"); |
| if (s != "pants") { |
| System.err.printf(testFuncName + " failed to return its arg"); |
| errors++; |
| } |
| } catch (NullPointerException e) { |
| System.err.printf(testFuncName + " threw unexpected NPE"); |
| errors++; |
| } |
| return errors; |
| } |
| |
| private static int testRNN_Null(Function<String, String> testFunc, |
| String testFuncName, |
| String expectedMessage) { |
| int errors = 0; |
| try { |
| String s = testFunc.apply(null); |
| System.err.printf(testFuncName + " failed to throw NPE"); |
| errors++; |
| } catch (NullPointerException e) { |
| if (e.getMessage() != expectedMessage) { |
| System.err.printf(testFuncName + " threw NPE w/ bad detail msg"); |
| errors++; |
| } |
| } |
| return errors; |
| } |
| |
| private static int testIsNull() { |
| int errors = 0; |
| |
| errors += Objects.isNull(null) ? 0 : 1; |
| errors += Objects.isNull(Objects.class) ? 1 : 0; |
| |
| return errors; |
| } |
| |
| private static int testNonNull() { |
| int errors = 0; |
| |
| errors += Objects.nonNull(null) ? 1 : 0; |
| errors += Objects.nonNull(Objects.class) ? 0 : 1; |
| |
| return errors; |
| } |
| |
| private static int testNonNullOf() { |
| int errors = 0; |
| String defString = new String("default"); |
| String nullString = null; |
| String nonNullString = "non-null"; |
| |
| // Confirm the compile time return type matches |
| String result = Objects.requireNonNullElse(nullString, defString); |
| errors += (result == defString) ? 0 : 1; |
| errors += (Objects.requireNonNullElse(nonNullString, defString) == nonNullString) ? 0 : 1; |
| errors += (Objects.requireNonNullElse(nonNullString, null) == nonNullString) ? 0 : 1; |
| try { |
| Objects.requireNonNullElse(null, null); |
| errors += 1; |
| } catch (NullPointerException npe) { |
| // expected |
| errors += npe.getMessage().equals("defaultObj") ? 0 : 1; |
| } |
| |
| |
| // Test requireNonNullElseGet with a supplier |
| errors += (Objects.requireNonNullElseGet(nullString, () -> defString) == defString) ? 0 : 1; |
| errors += (Objects.requireNonNullElseGet(nonNullString, () -> defString) == nonNullString) ? 0 : 1; |
| errors += (Objects.requireNonNullElseGet(nonNullString, () -> null) == nonNullString) ? 0 : 1; |
| |
| try { |
| Objects.requireNonNullElseGet(null, () -> null); |
| errors += 1; |
| } catch (NullPointerException npe) { |
| // expected |
| errors += npe.getMessage().equals("supplier.get()") ? 0 : 1; |
| } |
| try { // supplier is null |
| Objects.requireNonNullElseGet(null, null); |
| errors += 1; |
| } catch (NullPointerException npe) { |
| // expected |
| errors += npe.getMessage().equals("supplier") ? 0 : 1; |
| } |
| return errors; |
| } |
| } |