// Prepare Data for Clear
	if err := DB.Model(&user2).Association("Languages").Append(&language); err != nil {
		t.Fatalf("Error happened when append Languages, got %v", err)
	}

	AssertAssociationCount(t, user2, "Languages", 1, "after prepare data")

	// Clear
	if err := DB.Model(&user2).Association("Languages").Clear(); err != nil {
		t.Errorf("Error happened when clear Languages, got %v", err)
	}

    @Override
    protected boolean isUseOneTimeContainer() {
        return true;
    }

    public void test_maxUsernameLength() throws IOException {
        FessProp.propMap.clear();
        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override
            public Integer getLdapMaxUsernameLengthAsInteger() {
                return Integer.valueOf(-1);
            }
        };

        }
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.filter.UrlFilter#clear()
     */
    @Override
    public void clear() {
        cachedIncludeSet.clear();
        cachedExcludeSet.clear();
        if (sessionId != null) {
            getUrlFilterService().delete(sessionId);
        }
    }

    /*
     * (non-Javadoc)

	// Prepare Data for Clear
	account = Account{Number: "account-has-one-append"}
	if err := DB.Model(&user2).Association("Account").Append(&account); err != nil {
		t.Fatalf("Error happened when append Account, got %v", err)
	}

	AssertAssociationCount(t, user2, "Account", 1, "after prepare data")

	// Clear
	if err := DB.Model(&user2).Association("Account").Clear(); err != nil {

	// Prepare Data for Clear
	if err := DB.Model(&user2).Association("Pets").Append(&pet); err != nil {
		t.Fatalf("Error happened when append Pets, got %v", err)
	}

	AssertAssociationCount(t, user2, "Pets", 1, "after prepare data")

	// Clear
	if err := DB.Model(&user2).Association("Pets").Clear(); err != nil {
		t.Errorf("Error happened when clear Pets, got %v", err)
	}

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MapClearTester<K, V> extends AbstractMapTester<K, V> {
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClear() {
    getMap().clear();
    assertTrue("After clear(), a map should be empty.", getMap().isEmpty());
    assertEquals(0, getMap().size());
    assertFalse(getMap().entrySet().iterator().hasNext());
  }

  public void testClear() {
    multimap().clear();
    assertCleared();
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClearThroughEntries() {
    multimap().entries().clear();
    assertCleared();
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClearThroughAsMap() {
    multimap().asMap().clear();
    assertCleared();
  }

  @MapFeature.Require(SUPPORTS_REMOVE)

  public void testClearClearsInverse() {
    BiMap<V, K> inv = getMap().inverse();
    getMap().clear();
    assertTrue(getMap().isEmpty());
    assertTrue(inv.isEmpty());
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testKeySetClearClearsInverse() {
    BiMap<V, K> inv = getMap().inverse();
    getMap().keySet().clear();
    assertTrue(getMap().isEmpty());
    assertTrue(inv.isEmpty());
  }

  public void testClearClearsInverse() {
    BiMap<V, K> inv = getMap().inverse();
    getMap().clear();
    assertTrue(getMap().isEmpty());
    assertTrue(inv.isEmpty());
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testKeySetClearClearsInverse() {
    BiMap<V, K> inv = getMap().inverse();
    getMap().keySet().clear();
    assertTrue(getMap().isEmpty());
    assertTrue(inv.isEmpty());
  }

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MapClearTester<K, V> extends AbstractMapTester<K, V> {
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testClear() {
    getMap().clear();
    assertTrue("After clear(), a map should be empty.", getMap().isEmpty());
    assertEquals(0, getMap().size());
    assertFalse(getMap().entrySet().iterator().hasNext());
  }