* {@code class.getPackage().getName()} produces a {@code NullPointerException} because {@code
     * class.getPackage()} returns {@code null}.
     */
    public String getPackageName() {
      return Reflection.getPackageName(className);
    }

    /**
     * Returns the simple name of the underlying class as given in the source code.
     *

                }
            } else if (name.equals(baseName)) {
                return importedClass;
            }
        }

        candidateClassName = classMetaData.getPackageName() + "." + name;
        if (metaDataRepository.find(candidateClassName) != null) {
            return candidateClassName;
        }

        candidateClassName = "java.lang." + name;

          .toSet();

  public void testClassesHaveOverrides() throws Exception {
    for (ClassInfo info : ClassPath.from(getClass().getClassLoader()).getAllClasses()) {
      if (!GUAVA_PACKAGES.contains(info.getPackageName())) {
        continue;
      }
      if (info.getName().endsWith("GwtSerializationDependencies")) {
        continue; // These classes exist only for the GWT compiler, not to be used.
      }
      if (
      /*

          .toSet();

  public void testClassesHaveOverrides() throws Exception {
    for (ClassInfo info : ClassPath.from(getClass().getClassLoader()).getAllClasses()) {
      if (!GUAVA_PACKAGES.contains(info.getPackageName())) {
        continue;
      }
      if (info.getName().endsWith("GwtSerializationDependencies")) {
        continue; // These classes exist only for the GWT compiler, not to be used.
      }
      if (
      /*

        assertThat(ClassUtil.isAssignableFrom(int.class, Integer.class), is(true));
    }

    /**
     *
     */
    @Test
    public void testGetPackageName() {
        assertThat(ClassUtil.getPackageName(getClass()), is("org.codelibs.core.lang"));
    }

    /**
     *
     */
    @Test
    public void testGetShortClassName() {

      this.declaringClass = declaringClass;
      this.factories = factories;
      this.factoryMethodsDescription = factoryMethodsDescription;
      packagesToTest.add(Reflection.getPackageName(declaringClass));
    }

    /**
     * Specifies that only the methods that are declared to return {@code returnType} or its subtype
     * are tested.
     *
     * @return this tester object
     */

      // a file.
      String visiblePackage = Reflection.getPackageName(cls);
      ImmutableList.Builder<Method> builder = ImmutableList.builder();
      for (Class<?> type : TypeToken.of(cls).getTypes().rawTypes()) {
        if (!Reflection.getPackageName(type).equals(visiblePackage)) {
          break;
        }
        for (Method method : type.getDeclaredMethods()) {

  }

  public void testGetPackageName() {
    assertEquals(
        "", new ClassInfo(FILE, "Foo.class", getClass().getClassLoader()).getPackageName());
    assertEquals(
        "a.b", new ClassInfo(FILE, "a/b/Foo.class", getClass().getClassLoader()).getPackageName());
  }

  // Test that ResourceInfo.urls() returns identical content to ClassLoader.getResources()


  @AndroidIncompatible

  }

  public void testGetPackageName() {
    assertEquals(
        "", new ClassInfo(FILE, "Foo.class", getClass().getClassLoader()).getPackageName());
    assertEquals(
        "a.b", new ClassInfo(FILE, "a/b/Foo.class", getClass().getClassLoader()).getPackageName());
  }

  // Test that ResourceInfo.urls() returns identical content to ClassLoader.getResources()


  @AndroidIncompatible

        }
    }

    /**
     * パッケージ名を返します。
     *
     * @param clazz
     *            クラス。{@literal null}であってはいけません
     * @return パッケージ名
     */
    public static String getPackageName(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);

        final String fqcn = clazz.getName();
        final int pos = fqcn.lastIndexOf('.');
        if (pos > 0) {