when(mockTransport.unwrap(SmbTransportInternal.class)).thenReturn(internal);
        when(internal.getSmbSession(eq(ctx), eq("server.test"), isNull())).thenReturn(session);
        when(session.unwrap(SmbSessionInternal.class)).thenReturn(session);
        when(session.getSmbTree(eq("IPC$"), isNull())).thenReturn(tree);
        when(tree.unwrap(SmbTreeInternal.class)).thenReturn(tree);

      }
    }

    try {
      Range<C> span = rangeSet.span();
      assertEquals(expectedSpan, span);
    } catch (NoSuchElementException e) {
      assertThat(expectedSpan).isNull();
    }

    // test that asDescendingSetOfRanges is the reverse of asRanges
    assertEquals(Lists.reverse(asRanges), ImmutableList.copyOf(rangeSet.asDescendingSetOfRanges()));
  }

    assertThat(TypeToken.of(Object.class).getComponentType()).isNull();
    assertThat(TypeToken.of(void.class).getComponentType()).isNull();
  }

  public <T> void testGetComponentType_genericArrayClasses() {
    assertThat(TypeToken.of(new TypeCapture<T>() {}.capture()).getComponentType()).isNull();
    assertEquals(
        TypeToken.of(new TypeCapture<T>() {}.capture()),

    assertThat(Strings.nullToEmpty("")).isEqualTo("");
    assertThat(Strings.nullToEmpty("a")).isEqualTo("a");
  }

  public void testEmptyToNull() {
    assertThat(Strings.emptyToNull(null)).isNull();
    assertThat(Strings.emptyToNull("")).isNull();
    assertThat(Strings.emptyToNull("a")).isEqualTo("a");
  }

  public void testIsNullOrEmpty() {
    assertTrue(Strings.isNullOrEmpty(null));
    assertTrue(Strings.isNullOrEmpty(""));

      assertThat(root.getParent()).isNull();
      assertThat(root.toRealPath().getParent()).isNull();
      MoreFiles.createParentDirectories(root); // test that there's no exception
    }
  }

  public void testCreateParentDirectories_relativePath() throws IOException {
    Path path = FS.getPath("nonexistent.file");
    assertThat(path.getParent()).isNull();

    assertThat(INSTANCE.toString()).isEqualTo("{}");
  }

  public void testSize() {
    assertEquals(0, INSTANCE.size());
  }

  public void testGet() {
    assertThat(INSTANCE.get('a', 1)).isNull();
  }

  public void testIsEmpty() {
    assertTrue(INSTANCE.isEmpty());
  }

  public void testCellSet() {
    assertEquals(ImmutableSet.of(), INSTANCE.cellSet());
  }

  public void testColumn() {

    assertEquals(1, (int) mmHeap.peek());
    assertEquals(1, (int) mmHeap.peekLast());
    assertEquals(1, (int) mmHeap.pollLast());
    assertThat(mmHeap.peek()).isNull();
    assertThat(mmHeap.peekLast()).isNull();
    assertThat(mmHeap.pollLast()).isNull();
  }

  public void testSmallMinHeap() {
    MinMaxPriorityQueue<Integer> mmHeap = MinMaxPriorityQueue.create();
    mmHeap.add(1);
    mmHeap.add(3);

   * null.
   *
   * <p><b>Discouraged:</b> Prefer using either {@code x -> x == null} or {@code Objects::isNull},
   * but note that lambdas and method references do not have human-readable {@link #toString()}
   * representations and are not serializable.
   */
  public static <T extends @Nullable Object> Predicate<T> isNull() {
    return ObjectPredicate.IS_NULL.withNarrowedType();
  }

  /**

    for (int n = 0; n < replacementArray.length; n++) {
      char c = (char) n;
      String expected = map.get(c);
      if (expected == null) {
        assertThat(replacementArray[n]).isNull();
      } else {
        assertThat(new String(replacementArray[n])).isEqualTo(expected);
      }
    }
  }

import assertk.assertions.isCloseTo
import assertk.assertions.isEmpty
import assertk.assertions.isEqualTo
import assertk.assertions.isFalse
import assertk.assertions.isNotNull
import assertk.assertions.isNull
import assertk.assertions.isTrue
import java.io.IOException
import java.net.CookieManager
import java.net.HttpURLConnection
import java.net.ResponseCache
import java.text.DateFormat
import java.text.SimpleDateFormat