// many to many
	err = DB.Model(&emptyUser).Association("Languages").Delete(&user1.Languages)
	AssertEqual(t, err, gorm.ErrPrimaryKeyRequired)
}

type (
	myType           string
	emptyQueryClause struct {
		Field *schema.Field
	}
)

func (myType) QueryClauses(f *schema.Field) []clause.Interface {
	return []clause.Interface{emptyQueryClause{Field: f}}
}

func (sd emptyQueryClause) Name() string {

   *
   * <p><b>{@code Stream} equivalent:</b> if an object array is acceptable, use {@code
   * stream.toArray()}; if {@code type} is a class literal such as {@code MyType.class}, use {@code
   * stream.toArray(MyType[]::new)}. Otherwise use {@code stream.toArray( len -> (E[])
   * Array.newInstance(type, len))}.
   *
   * @param type the type of the elements

   *
   * <p><b>{@code Stream} equivalent:</b> if an object array is acceptable, use {@code
   * stream.toArray()}; if {@code type} is a class literal such as {@code MyType.class}, use {@code
   * stream.toArray(MyType[]::new)}. Otherwise use {@code stream.toArray( len -> (E[])
   * Array.newInstance(type, len))}.
   *
   * @param type the type of the elements

public class ReflectionTest extends TestCase {

  public void testGetPackageName() throws Exception {
    assertThat(Reflection.getPackageName(Iterable.class)).isEqualTo("java.lang");
    assertThat(Reflection.getPackageName("java.MyType")).isEqualTo("java");
    assertThat(Reflection.getPackageName(Iterable.class.getName())).isEqualTo("java.lang");
    assertThat(Reflection.getPackageName("NoPackage")).isEqualTo("");

public class ReflectionTest extends TestCase {

  public void testGetPackageName() throws Exception {
    assertThat(Reflection.getPackageName(Iterable.class)).isEqualTo("java.lang");
    assertThat(Reflection.getPackageName("java.MyType")).isEqualTo("java");
    assertThat(Reflection.getPackageName(Iterable.class.getName())).isEqualTo("java.lang");
    assertThat(Reflection.getPackageName("NoPackage")).isEqualTo("");