filtered.put("a", 1);
    filtered.put("b", 2);
    assertEquals(ImmutableMap.of("a", 1, "b", 2), filtered);

    try {
      filtered.put("yyy", 3);
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testFilteredKeysIllegalPutAll() {
    Map<String, Integer> unfiltered = createUnfiltered();

    Iterator<Object> empty = new EmptyAbstractSequentialIterator<>();
    assertFalse(empty.hasNext());
    try {
      empty.next();
      fail();
    } catch (NoSuchElementException expected) {
    }
    try {
      empty.remove();
      fail();
    } catch (UnsupportedOperationException expected) {
    }
  }

  public void testBroken() {

			var dexp DelMarkerExpiration
			var fail bool
			err := xml.Unmarshal([]byte(test.xml), &dexp)
			if test.err == nil {
				if err != nil {
					fail = true
				}
			} else {
				if err == nil {
					fail = true
				}
				if test.err.Error() != err.Error() {
					fail = true
				}
			}
			if fail {
				t.Fatalf("Expected %v but got %v", test.err, err)
			}
		})
	}

    try {
      diff1.entriesInCommon().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      diff1.entriesOnlyOnLeft().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      diff1.entriesOnlyOnRight().put(7, "x");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
  }

  }

  public void testNullListener() {
    try {
      future.addListener(null, directExecutor());
      fail();
    } catch (NullPointerException expected) {
    }
  }

  public void testNullExecutor() {
    try {
      future.addListener(doNothing(), null);
      fail();
    } catch (NullPointerException expected) {
    }
  }

  public void testNullTimeUnit() throws Exception {

    try {
      table.at(1, 3);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }
    try {
      table.at(1, -1);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }
    try {
      table.at(3, 2);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }
    try {
      table.at(-1, 2);
      fail();

    try {
      table.at(1, 3);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }
    try {
      table.at(1, -1);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }
    try {
      table.at(3, 2);
      fail();
    } catch (IndexOutOfBoundsException expected) {
    }
    try {
      table.at(-1, 2);
      fail();

    expectMissing(e0());
  }

  @CollectionFeature.Require({SUPPORTS_REMOVE, FAILS_FAST_ON_CONCURRENT_MODIFICATION})
  @CollectionSize.Require(SEVERAL)
  public void testRemovePresentConcurrentWithIteration() {
    try {
      Iterator<E> iterator = collection.iterator();
      assertTrue(collection.remove(e0()));
      iterator.next();
      fail("Expected ConcurrentModificationException");

    try {
      getDone(immediateFailedFuture(failureCause));
      fail();
    } catch (ExecutionException expected) {
      assertThat(expected).hasCauseThat().isEqualTo(failureCause);
    }
  }

  public void testCancelled() throws ExecutionException {
    try {
      getDone(immediateCancelledFuture());
      fail();
    } catch (CancellationException expected) {
    }
  }

    try {
      getList().addAll(0, null);
      fail("addAll(n, null) should throw");
    } catch (NullPointerException expected) {
    }
    expectUnchanged();
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  public void testAddAllAtIndex_negative() {
    try {
      getList().addAll(-1, MinimalCollection.of(e3()));
      fail("addAll(-1, e) should throw");