359 
 360     @Test(expectedExceptions=NullPointerException.class)
 361     public void nullValueDisallowedVarN() {
 362         Map.Entry<Integer,String>[] entries = genEntries(MAX_ENTRIES);
 363         entries[0] = new AbstractMap.SimpleImmutableEntry<>(0, null);
 364         Map<Integer, String> map = Map.ofEntries(entries);
 365     }
 366 
 367     @Test(expectedExceptions=NullPointerException.class)
 368     public void nullEntryDisallowedVarN() {
 369         Map.Entry<Integer,String>[] entries = genEntries(MAX_ENTRIES);
 370         entries[5] = null;
 371         Map<Integer, String> map = Map.ofEntries(entries);
 372     }
 373 
 374     @Test(expectedExceptions=NullPointerException.class)
 375     public void nullArrayDisallowed() {
 376         Map.ofEntries((Map.Entry<?,?>[])null);
 377     }
 378 










 379     @Test(dataProvider="all")
 380     public void serialEquality(Map<Integer, String> act, Map<Integer, String> exp) {
 381         // assume that act.equals(exp) tested elsewhere
 382         Map<Integer, String> copy = serialClone(act);
 383         assertEquals(act, copy);
 384         assertEquals(copy, exp);
 385     }
 386 
 387     @SuppressWarnings("unchecked")
 388     static <T> T serialClone(T obj) {
 389         try {
 390             ByteArrayOutputStream baos = new ByteArrayOutputStream();
 391             try (ObjectOutputStream oos = new ObjectOutputStream(baos)) {
 392                 oos.writeObject(obj);
 393             }
 394             ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
 395             ObjectInputStream ois = new ObjectInputStream(bais);
 396             return (T) ois.readObject();
 397         } catch (IOException | ClassNotFoundException e) {
 398             throw new AssertionError(e);

 359 
 360     @Test(expectedExceptions=NullPointerException.class)
 361     public void nullValueDisallowedVarN() {
 362         Map.Entry<Integer,String>[] entries = genEntries(MAX_ENTRIES);
 363         entries[0] = new AbstractMap.SimpleImmutableEntry<>(0, null);
 364         Map<Integer, String> map = Map.ofEntries(entries);
 365     }
 366 
 367     @Test(expectedExceptions=NullPointerException.class)
 368     public void nullEntryDisallowedVarN() {
 369         Map.Entry<Integer,String>[] entries = genEntries(MAX_ENTRIES);
 370         entries[5] = null;
 371         Map<Integer, String> map = Map.ofEntries(entries);
 372     }
 373 
 374     @Test(expectedExceptions=NullPointerException.class)
 375     public void nullArrayDisallowed() {
 376         Map.ofEntries((Map.Entry<?,?>[])null);
 377     }
 378 
 379     @Test(dataProvider="all", expectedExceptions=NullPointerException.class)
 380     public void containsValueNullShouldThrowNPE(Map<Integer,String> act, Map<Integer,String> exp) {
 381         act.containsValue(null);
 382     }
 383 
 384     @Test(dataProvider="all", expectedExceptions=NullPointerException.class)
 385     public void containsKeyNullShouldThrowNPE(Map<Integer,String> act, Map<Integer,String> exp) {
 386         act.containsKey(null);
 387     }
 388 
 389     @Test(dataProvider="all")
 390     public void serialEquality(Map<Integer, String> act, Map<Integer, String> exp) {
 391         // assume that act.equals(exp) tested elsewhere
 392         Map<Integer, String> copy = serialClone(act);
 393         assertEquals(act, copy);
 394         assertEquals(copy, exp);
 395     }
 396 
 397     @SuppressWarnings("unchecked")
 398     static <T> T serialClone(T obj) {
 399         try {
 400             ByteArrayOutputStream baos = new ByteArrayOutputStream();
 401             try (ObjectOutputStream oos = new ObjectOutputStream(baos)) {
 402                 oos.writeObject(obj);
 403             }
 404             ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
 405             ObjectInputStream ois = new ObjectInputStream(bais);
 406             return (T) ois.readObject();
 407         } catch (IOException | ClassNotFoundException e) {
 408             throw new AssertionError(e);