assertEquals(result, future.get());
    assertThat(successCalls[0]).isEqualTo(1);
    assertThat(failureCalls[0]).isEqualTo(0);
  }

  public void testOnSuccessThrowsError() throws Exception {
    SomeError error = new SomeError();
    String result = "result";
    SettableFuture<String> future = SettableFuture.create();
    int[] successCalls = new int[1];
    int[] failureCalls = new int[1];
    FutureCallback<String> callback =

    assertEquals(result, future.get());
    assertThat(successCalls[0]).isEqualTo(1);
    assertThat(failureCalls[0]).isEqualTo(0);
  }

  public void testOnSuccessThrowsError() throws Exception {
    SomeError error = new SomeError();
    String result = "result";
    SettableFuture<String> future = SettableFuture.create();
    int[] successCalls = new int[1];
    int[] failureCalls = new int[1];
    FutureCallback<String> callback =

          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(SomeCheckedException.class, e -> e instanceof SomeCheckedException)
          .put(SomeError.class, e -> e instanceof SomeError)
          .put(SomeOtherCheckedException.class, e -> e instanceof SomeOtherCheckedException)
          .put(SomeUncheckedException.class, e -> e instanceof SomeUncheckedException)

  // We're testing that the method is in fact equivalent to throwing the exception directly.
  @SuppressWarnings("ThrowIfUncheckedKnownUnchecked")
  public void testThrowIfUnchecked_error() {
    assertThrows(SomeError.class, () -> throwIfUnchecked(new SomeError()));
  }

  @SuppressWarnings("ThrowIfUncheckedKnownChecked")
  public void testThrowIfUnchecked_checked() {
    throwIfUnchecked(new SomeCheckedException());
  }

  @J2ktIncompatible

package com.google.common.collect.testing.testers;

import com.google.common.annotations.GwtCompatible;

/** Exception classes for use in tests. */
@GwtCompatible
final class TestExceptions {
  static final class SomeError extends Error {}

  static final class SomeCheckedException extends Exception {}

  static final class SomeOtherCheckedException extends Exception {}

  static final class YetAnotherCheckedException extends Exception {}

          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(SomeCheckedException.class, e -> e instanceof SomeCheckedException)
          .put(SomeError.class, e -> e instanceof SomeError)
          .put(SomeOtherCheckedException.class, e -> e instanceof SomeOtherCheckedException)
          .put(SomeUncheckedException.class, e -> e instanceof SomeUncheckedException)

          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(SomeCheckedException.class, e -> e instanceof SomeCheckedException)
          .put(SomeError.class, e -> e instanceof SomeError)
          .put(SomeOtherCheckedException.class, e -> e instanceof SomeOtherCheckedException)
          .put(SomeUncheckedException.class, e -> e instanceof SomeUncheckedException)

          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(SomeCheckedException.class, e -> e instanceof SomeCheckedException)
          .put(SomeError.class, e -> e instanceof SomeError)
          .put(SomeOtherCheckedException.class, e -> e instanceof SomeOtherCheckedException)
          .put(SomeUncheckedException.class, e -> e instanceof SomeUncheckedException)

  // We're testing that the method is in fact equivalent to throwing the exception directly.
  @SuppressWarnings("ThrowIfUncheckedKnownUnchecked")
  public void testThrowIfUnchecked_error() {
    assertThrows(SomeError.class, () -> throwIfUnchecked(new SomeError()));
  }

  @SuppressWarnings("ThrowIfUncheckedKnownChecked")
  public void testThrowIfUnchecked_checked() {
    throwIfUnchecked(new SomeCheckedException());
  }

  @J2ktIncompatible

import com.google.common.annotations.GwtCompatible;
import org.jspecify.annotations.NullUnmarked;

/** Exception classes for use in tests. */
@GwtCompatible
@NullUnmarked
final class TestExceptions {
  static class SomeError extends Error {}

  static class SomeCheckedException extends Exception {}

  static class SomeOtherCheckedException extends Exception {}

  static class YetAnotherCheckedException extends Exception {}