import junit.framework.Test;
import junit.framework.TestSuite;

/**
 * Generates a test suite covering the {@link Map} implementations in the {@link java.util} package.
 * Can be subclassed to specify tests that should be suppressed.
 *
 * @author Kevin Bourrillion
 */
@GwtIncompatible
public class TestsForMapsInJavaUtil {

  public static Test suite() {

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Queues}.
 *
 * @author Dimitris Andreou
 */
@NullUnmarked
public class QueuesTest extends TestCase {
  /*
   * All the following tests relate to BlockingQueue methods in Queues.
   */

  public static List<BlockingQueue<Object>> blockingQueues() {

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That tutorial includes a section about <a href="https://sqlmodel.tiangolo.com/tutorial/fastapi/tests/" class="external-link" target="_blank">testing SQL databases</a>. 😎...

package com.google.common.base;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.testing.AbstractPackageSanityTests;
import org.jspecify.annotations.NullUnmarked;

/** Basic sanity tests for classes in {@code common.base}. */

@GwtIncompatible
@NullUnmarked
public class PackageSanityTests extends AbstractPackageSanityTests {
  public PackageSanityTests() {

import java.util.Collection;
import org.junit.Ignore;

/**
 * Tests for {@link Multimap#removeAll(Object)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")
// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")

import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code spliterator} operations on a collection. Can't be invoked
 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")

      return super.toString();
    }

    private static final long serialVersionUID = 0;
  }

  /*
   * This is somewhat of a weak test; we verify that all of the methods are
   * correct, but not that they're actually forwarding correctly. We also rely
   * on the other tests (e.g., SynchronizedSetTest) to verify that the
   * collection views are synchronized correctly.
   */

  public void testSize() {

import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link GcFinalization}.
 *
 * @author Martin Buchholz
 * @author mike nonemacher
 */
@AndroidIncompatible // depends on details of gc

@NullUnmarked
public class GcFinalizationTest extends TestCase {

  // ----------------------------------------------------------------
  // Ordinary tests of successful method execution

import static org.junit.Assert.assertThrows;

import java.io.IOException;
import java.nio.CharBuffer;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for {@link CharSequenceReader}.
 *
 * @author Colin Decker
 */
@NullUnmarked
public class CharSequenceReaderTest extends TestCase {

  public void testReadEmptyString() throws IOException {

import java.util.Arrays;
import java.util.Comparator;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Tester of subtyping relationships between two types.
 *
 * <p>Tests should inherit from this class, and declare subtyping relationship with public methods
 * annotated by {@link TestSubtype}.
 *
 * <p>These declaration methods rely on Java static type checking to make sure what we want to