}
  }

  public void testBogusSystemPropertiesUsername() {
    if (isAndroid()) {
      /*
       * The test calls directly into the "ACL-based filesystem" code, which isn't available under
       * old versions of Android. Since Android doesn't use that code path, anyway, there's no need
       * to test it.
       */
      return;
    }

    /*

   * exception's creation.
   *
   * @since 19.0
   * @deprecated This method is equivalent to {@link Throwable#getStackTrace()} on JDK versions past
   *     JDK 8 and on all Android versions. Use {@link Throwable#getStackTrace()} directly, or where
   *     possible use the {@code java.lang.StackWalker.walk} method introduced in JDK 9.
   */
  @Deprecated
  @J2ktIncompatible

   * exception's creation.
   *
   * @since 19.0
   * @deprecated This method is equivalent to {@link Throwable#getStackTrace()} on JDK versions past
   *     JDK 8 and on all Android versions. Use {@link Throwable#getStackTrace()} directly, or where
   *     possible use the {@code java.lang.StackWalker.walk} method introduced in JDK 9.
   */
  @Deprecated
  @J2ktIncompatible

    }
  }

  public void testBogusSystemPropertiesUsername() {
    if (isAndroid()) {
      /*
       * The test calls directly into the "ACL-based filesystem" code, which isn't available under
       * old versions of Android. Since Android doesn't use that code path, anyway, there's no need
       * to test it.
       */
      return;
    }

    /*

   * so that we get partial compile-time checking.)
   *
   * <p>This workaround should be removed at a distant future time when we no longer support Java
   * versions earlier than 8.
   */
  @SuppressWarnings("removal") // b/318391980
  private static final class TypeVariableInvocationHandler implements InvocationHandler {

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;

import java.lang.annotation.Target;

/**
 * Disables Animal Sniffer's checking of compatibility with older versions of Java/Android.
 *
 * <p>Each package's copy of this annotation needs to be listed in our {@code pom.xml}.
 */
@Target({METHOD, CONSTRUCTOR, TYPE})
@ElementTypesAreNonnullByDefault

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;

import java.lang.annotation.Target;

/**
 * Disables Animal Sniffer's checking of compatibility with older versions of Java/Android.
 *
 * <p>Each package's copy of this annotation needs to be listed in our {@code pom.xml}.
 */
@Target({METHOD, CONSTRUCTOR, TYPE})
@ElementTypesAreNonnullByDefault

import junit.framework.TestCase;

/**
 * Tests for {@link DoubleUtils}.
 *
 * @author Louis Wasserman
 */
public class DoubleUtilsTest extends TestCase {
  @AndroidIncompatible // no FpUtils and no Math.nextDown in old versions
  public void testNextDown() throws Exception {
    Method jdkNextDown = getJdkNextDown();
    for (double d : FINITE_DOUBLE_CANDIDATES) {
      assertEquals(jdkNextDown.invoke(null, d), DoubleUtils.nextDown(d));
    }

    Collection<E> siblingCollection = new ArrayList<>();
    siblingCollection.add(sampleElement);

    Collection<E> copy = new ArrayList<>();
    // Avoid copy.addAll(collection), which runs afoul of an Android bug in older versions:
    // http://b.android.com/72073 http://r.android.com/98929
    Iterators.addAll(copy, collection.iterator());

    try {
      collection.add(sampleElement);

 * the very old Android Ice Cream Sandwich release), then this stream throws an exception instead of
 * creating a file that would be more accessible. (This behavior is new in Guava 32.0.0. Previous
 * versions would create a file that is more accessible, as discussed in <a
 * href="https://github.com/google/guava/issues/2575">Guava issue 2575</a>. TODO: b/283778848 - Fill
 * in CVE number once it's available.)
 *