for (Table<Character, Integer, String> testInstance : getTestInstances()) {
      assertThrows(UnsupportedOperationException.class, () -> testInstance.clear());
    }
  }

  public final void testPut() {
    for (Table<Character, Integer, String> testInstance : getTestInstances()) {
      assertThrows(UnsupportedOperationException.class, () -> testInstance.put('a', 1, "blah"));
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  @Override
  public void testNullPointerInstance() {}

  // put() and putAll() aren't supported.
  @Override
  public void testPut() {
    assertThrows(UnsupportedOperationException.class, () -> table.put("foo", 1, 'a'));
    assertSize(0);
  }

  @Override
  public void testPutAllTable() {

    }

    /**
     * @throws Exception
     */
    @Test
    public void testGet() throws Exception {
        assertThat(map.get("ONE"), is("1"));
        assertThat(map.get("One"), is("1"));
        assertThat(map.get("hoge"), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPut() throws Exception {
        assertThat(map.put("One", "11"), is("1"));

      assertEquals(0, table.size());
      assertFalse(table.containsRow("foo"));
    } else {
      assertThrows(UnsupportedOperationException.class, () -> table.clear());
    }
  }

  public void testPut() {
    assertThat(table.put("foo", 1, cellValue('a'))).isNull();
    assertThat(table.put("bar", 1, cellValue('b'))).isNull();
    assertThat(table.put("foo", 3, cellValue('c'))).isNull();

    boolean unused = create().containsKey(null);
  }

  public void testContainsValue() {
    boolean unused = create().containsValue(null);
  }

  public void testGet() {
    Object unused = create().get(null);
  }

  public void testPut() {
    create().put(null, null);
  }

  public void testPutAll() {
    create().putAll(new HashMap<String, Integer>());
  }

  public void testKeySet() {

    boolean unused = create().containsKey(null);
  }

  public void testContainsValue() {
    boolean unused = create().containsValue(null);
  }

  public void testGet() {
    Object unused = create().get(null);
  }

  public void testPut() {
    create().put(null, null);
  }

  public void testPutAll() {
    create().putAll(new HashMap<String, Integer>());
  }

  public void testKeySet() {

      assertEquals(0, table.size());
      assertFalse(table.containsRow("foo"));
    } else {
      assertThrows(UnsupportedOperationException.class, () -> table.clear());
    }
  }

  public void testPut() {
    assertThat(table.put("foo", 1, cellValue('a'))).isNull();
    assertThat(table.put("bar", 1, cellValue('b'))).isNull();
    assertThat(table.put("foo", 3, cellValue('c'))).isNull();

     */
    @Test
    public void testGet() throws Exception {
        assertThat(map.get("1"), is("test"));
        assertThat(map.get(null), is(nullValue()));
        assertThat(map.get("test3"), is(nullValue()));
        assertThat(map.getAt(0), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPut() throws Exception {

    assertEquals(0L, map.get(key));
    assertTrue(map.containsKey(key));

    assertEquals(0L, map.getAndAdd(key, value));
    assertEquals(value, map.get(key));
  }

  public void testPut() {
    AtomicLongMap<String> map = AtomicLongMap.create();
    String key = "key";
    long newValue = random.nextInt(MAX_ADDEND);
    for (int i = 0; i < ITERATIONS; i++) {
      long before = map.get(key);

import org.jspecify.annotations.NullMarked;

/**
 * Tests for {@code Count}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@NullMarked
public class CountTest extends TestCase {
  public void testGet() {
    assertEquals(20, new Count(20).get());
  }

  public void testGetAndAdd() {
    Count holder = new Count(20);
    assertEquals(20, holder.get());
    holder.add(1);
    assertEquals(21, holder.get());