test/jdk/java/util/Objects/BasicObjectsTest.java - platform/libcore - Git at Google

 /*
  * 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;
     }
 }
	/*
	* 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;
	}
	}