* instance. This method is guaranteed to only be called once.
   *
   * <p>By default this returns a new {@link ScheduledExecutorService} with a single thread pool
   * that sets the name of the thread to the {@linkplain #serviceName() service name}. Also, the
   * pool will be {@linkplain ScheduledExecutorService#shutdown() shut down} when the service

@NullUnmarked
public final class SetsFilterSortedSetTest
    extends AbstractFilteredSortedSetTest<SortedSet<Integer>> {
  @Override
  SortedSet<Integer> createUnfiltered(Iterable<Integer> contents) {
    TreeSet<Integer> result = Sets.newTreeSet(contents);
    // we have to make the result not Navigable
    return new ForwardingSortedSet<Integer>() {
      @Override
      protected SortedSet<Integer> delegate() {
        return result;
      }

    }

    @Override
    int expectedValueCollectionSize(int defaultExpectedValues, Iterable<?> values) {
      // Only trust the size of `values` if it is a Set and therefore probably already deduplicated.
      if (values instanceof Set<?>) {
        Set<?> collection = (Set<?>) values;
        return max(defaultExpectedValues, collection.size());
      } else {
        return defaultExpectedValues;
      }
    }

    /**

              }
            });
  }

  public void testEquals() {
    NavigableSet<String> set1 = ImmutableSortedSet.of("one");
    NavigableSet<String> set2 = ImmutableSortedSet.of("two");
    new EqualsTester()
        .addEqualityGroup(set1, wrap(set1), wrap(set1))
        .addEqualityGroup(set2, wrap(set2))
        .testEquals();
  }

  private static <T> NavigableSet<T> wrap(NavigableSet<T> delegate) {

  public void testSameComparator() {
    assertTrue(SortedIterables.hasSameComparator(Ordering.natural(), Sets.newTreeSet()));
    assertTrue(SortedIterables.hasSameComparator(Ordering.natural(), Maps.newTreeMap().keySet()));
    assertTrue(
        SortedIterables.hasSameComparator(
            Ordering.natural().reverse(), Sets.newTreeSet(Ordering.natural().reverse())));
  }

  public void testComparator() {

import com.google.common.annotations.GwtCompatible;
import java.util.Collection;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * A set which forwards all its method calls to another set. Subclasses should override one or more
 * methods to modify the behavior of the backing set as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *

    }

    // this optimizes testing equality of two range-backed sets
    if (values instanceof SortedSet) {
      SortedSet<? extends C> set = (SortedSet<? extends C>) values;
      Comparator<?> comparator = set.comparator();
      if (Ordering.natural().equals(comparator) || comparator == null) {
        return contains(set.first()) && contains(set.last());
      }
    }

    for (C value : values) {

            String rv0 = typed ? val0 : escapeJava(val0);
            if (!val0.trim().startsWith(escapedKey)) {
                valueLines.set(0, escapedKey + " = " + rv0 /*+ (0 < lastLine? "\\": "")*/);
                sb.append(escapedKey).append(" = ").append(rv0);
            } else {
                valueLines.set(0, rv0 /*+ (0 < lastLine? "\\": "")*/);
                sb.append(rv0);
            }
        }

            String rv0 = typed ? val0 : escapeJava(val0);
            if (!val0.trim().startsWith(escapedKey)) {
                valueLines.set(0, escapedKey + " = " + rv0 /*+ (0 < lastLine? "\\": "")*/);
                sb.append(escapedKey).append(" = ").append(rv0);
            } else {
                valueLines.set(0, rv0 /*+ (0 < lastLine? "\\": "")*/);
                sb.append(rv0);
            }
        }

{* ../../docs_src/response_model/tutorial005_py310.py hl[29,35] *}

/// tip | 提示

語法 `{"name", "description"}` 會建立一個包含這兩個值的 `set`。

它等同於 `set(["name", "description"])`。

///

#### 使用 `list` 來代替 `set` { #using-lists-instead-of-sets }

如果你忘了使用 `set` 而用了 `list` 或 `tuple`，FastAPI 仍會把它轉換成 `set`，並能正確運作：

{* ../../docs_src/response_model/tutorial006_py310.py hl[29,35] *}

## 重點回顧 { #recap }