File file = root();
    assertThat(file.getParentFile()).isNull();
    assertThat(file.getCanonicalFile().getParentFile()).isNull();
    Files.createParentDirs(file);
  }

  public void testCreateParentDirs_relativePath() throws IOException {
    File file = file("nonexistent.file");
    assertThat(file.getParentFile()).isNull();
    assertThat(file.getCanonicalFile().getParentFile()).isNotNull();

    assertEquals(bimap1, bimap2);
    bimap2.inverse().put("franc", Currency.FRANC);
    assertThat(bimap2.get(Currency.FRANC)).isEqualTo("franc");
    assertThat(bimap1.get(Currency.FRANC)).isNull();
    assertFalse(bimap2.equals(bimap1));

    /* Test that it can be empty. */
    EnumHashBiMap<Currency, String> emptyBimap = EnumHashBiMap.create(Currency.class);

 * limitations under the License.
 */
package okhttp3.compare

import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isNotNull
import assertk.assertions.isNull
import assertk.assertions.matches
import java.net.http.HttpClient
import java.net.http.HttpClient.Redirect.NORMAL
import java.net.http.HttpRequest
import java.net.http.HttpResponse.BodyHandlers

    val page2 = server.takeRequest()
    assertThat(page2.requestLine).isEqualTo("GET /page2 HTTP/1.1")
    assertThat(page2.headers["Content-Length"]).isNull()
    assertThat(page2.headers["Content-Type"]).isNull()
    assertThat(page2.headers["Transfer-Encoding"]).isNull()
  }

  @Test
  fun response305UseProxy() {
    server.enqueue(
      MockResponse(
        code = HttpURLConnection.HTTP_USE_PROXY,

    assertThat(request.header("User-Agent")).isNull()
    assertThat(request.header("Host")).isNull()
    assertThat(request.header("Accept-Encoding")).isNull()

    // No extra headers in the application's response.
    val response = client.newCall(request).execute()
    assertThat(request.header("Content-Encoding")).isNull()
    assertThat(response.body.string()).isEqualTo("abcabcabc")
  }

 * limitations under the License.
 */
package okhttp3.sse.internal

import assertk.assertThat
import assertk.assertions.isEmpty
import assertk.assertions.isEqualTo
import assertk.assertions.isNull
import java.util.concurrent.LinkedBlockingDeque
import java.util.concurrent.TimeUnit
import okhttp3.Response
import okhttp3.internal.platform.Platform
import okhttp3.internal.platform.Platform.Companion.get

  }

  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() {

    assertEquals(bimap1, bimap2);
    bimap2.inverse().put("franc", Currency.FRANC);
    assertThat(bimap2.get(Currency.FRANC)).isEqualTo("franc");
    assertThat(bimap1.get(Currency.FRANC)).isNull();
    assertFalse(bimap2.equals(bimap1));

    /* Test that it can be empty. */
    EnumHashBiMap<Currency, String> emptyBimap = EnumHashBiMap.create(Currency.class);

    assertTrue(future.isCancelled());
  }

  public void testAwaitClear() {
    WeakReference<Object> ref = createWeakReference();
    GcFinalization.awaitClear(ref);
    assertThat(ref.get()).isNull();
  }

  private WeakReference<Object> createWeakReference() {
    return new WeakReference<>(new Object());
  }

  public void testAwaitDone_finalizationPredicate() {

    assertTrue(future.isCancelled());
  }

  public void testAwaitClear() {
    WeakReference<Object> ref = createWeakReference();
    GcFinalization.awaitClear(ref);
    assertThat(ref.get()).isNull();
  }

  private WeakReference<Object> createWeakReference() {
    return new WeakReference<>(new Object());
  }

  public void testAwaitDone_finalizationPredicate() {