actualOccupiedDepth.set(monitor.getOccupiedDepth());
              } catch (Throwable t) {
                thrown.set(t);
              }
            }));
    assertThat(thrown.get()).isNull();
    assertEquals(expectedIsOccupied, actualIsOccupied.get());
    assertEquals(expectedIsOccupiedByCurrentThread, actualIsOccupiedByCurrentThread.get());
    assertEquals(expectedOccupiedDepth, actualOccupiedDepth.get());

 * limitations under the License.
 */
package okhttp3

import assertk.assertThat
import assertk.assertions.containsExactly
import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import okhttp3.internal.http.parseChallenges
import org.junit.jupiter.api.Disabled
import org.junit.jupiter.api.Test

class HeadersChallengesTest {
  /** See https://github.com/square/okhttp/issues/2780.  */

    assertValueAndTypeEquals(expected, generator.generateFresh(type));
    assertThat(generator.generateFresh(type)).isNull();
  }

  private static void assertNotInstantiable(TypeToken<?> type) {
    assertThat(new FreshValueGenerator().generateFresh(type)).isNull();
  }

  private static void assertValueAndTypeEquals(Object expected, Object actual) {
    assertEquals(expected, actual);

  }

  /*
   * Tests for Predicates.isNull()
   */

  public void testIsNull_apply() {
    Predicate<@Nullable Integer> isNull = Predicates.isNull();
    assertTrue(isNull.apply(null));
    assertFalse(isNull.apply(1));
  }

  public void testIsNull_equality() {
    new EqualsTester()
        .addEqualityGroup(Predicates.isNull(), Predicates.isNull())
        .addEqualityGroup(Predicates.notNull())

                            + "Found " + repositories.size() + " repositories but only " + set.size()
                            + " unique entries.");
        }
        if (repositories.stream().anyMatch(Objects::isNull)) {
            throw new IllegalArgumentException(
                    "Repository list contains null entries. All repository entries must be non-null RemoteRepository instances.");
        }
        return repositories;

    HostAndPort hp;
    try {
      hp = HostAndPort.fromString(hpString);
    } catch (IllegalArgumentException e) {
      // Make sure we expected this.
      assertThat(expectHost).isNull();
      return;
    }
    assertThat(expectHost).isNotNull();

    // Apply withDefaultPort(), yielding hp2.
    boolean badDefaultPort = defaultPort < 0 || defaultPort > 65535;
    HostAndPort hp2 = null;

    HostAndPort hp;
    try {
      hp = HostAndPort.fromString(hpString);
    } catch (IllegalArgumentException e) {
      // Make sure we expected this.
      assertThat(expectHost).isNull();
      return;
    }
    assertThat(expectHost).isNotNull();

    // Apply withDefaultPort(), yielding hp2.
    boolean badDefaultPort = defaultPort < 0 || defaultPort > 65535;
    HostAndPort hp2 = null;

  }

  public void testStringConverter_nullConversions() {
    assertThat(Doubles.stringConverter().convert(null)).isNull();
    assertThat(Doubles.stringConverter().reverse().convert(null)).isNull();
  }

  @GwtIncompatible // Double.toString returns different value in GWT.
  public void testStringConverter_reverse() {

          @Override
          public @Nullable Object getIfPresent(Object key) {
            return valueRef.get();
          }
        };

    assertThat(cache.getIfPresent(new Object())).isNull();

    Object newValue = new Object();
    valueRef.set(newValue);
    assertThat(cache.getIfPresent(new Object())).isSameInstanceAs(newValue);
  }

  public void testGetAllPresent_empty() {

      if (from == State.STARTING) {
        try {
          service.awaitRunning();
          fail();
        } catch (IllegalStateException expected) {
          assertThat(expected).hasCauseThat().isNull();
          assertThat(expected)
              .hasMessageThat()
              .isEqualTo("Expected the service " + service + " to be RUNNING, but was STOPPING");
        }
      }