1 /**
   2  * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @summary Basic test for Class.getPackage
  27  * @compile Foo.java
  28  * @run testng GetPackageTest
  29  */
  30 
  31 import org.testng.annotations.BeforeTest;
  32 import org.testng.annotations.DataProvider;
  33 import org.testng.annotations.Test;
  34 
  35 import java.io.IOException;
  36 import java.io.UncheckedIOException;
  37 import java.math.BigInteger;
  38 import java.nio.file.Files;
  39 import java.nio.file.Path;
  40 import java.nio.file.Paths;
  41 import java.util.Properties;
  42 
  43 import static org.testng.Assert.*;
  44 
  45 public class GetPackageTest {
  46     private static Class<?> fooClass; // definePackage is not called for Foo class
  47 
  48     @BeforeTest
  49     public static void loadFooClass() throws ClassNotFoundException {
  50         TestClassLoader loader = new TestClassLoader();
  51         fooClass = loader.loadClass("foo.Foo");
  52         assertEquals(fooClass.getClassLoader(), loader);
  53     }
  54 
  55     @DataProvider(name = "testClasses")
  56     public Object[][] testClasses() {
  57         return new Object[][] {
  58                 // primitive type, void, array types
  59                 { int.class,            null },
  60                 { long[].class,         null },
  61                 { Object[][].class,     null },
  62                 { void.class,           null },
  63 
  64                 // unnamed package
  65                 { GetPackageTest.class, "" },
  66 
  67                 // named package
  68                 { fooClass,             "foo" },
  69                 { Object.class,         "java.lang" },
  70                 { Properties.class,     "java.util" },
  71                 { BigInteger.class,     "java.math" },
  72                 { Test.class,           "org.testng.annotations" },
  73         };
  74     }
  75 
  76     @Test(dataProvider = "testClasses")
  77     public void testGetPackage(Class<?> type, String expected) {
  78         Package p = type.getPackage();
  79         if (expected == null) {
  80             assertTrue(p == null);
  81         } else {
  82             assertEquals(p.getName(), expected);
  83         }
  84     }
  85 
  86     static class TestClassLoader extends ClassLoader {
  87         public TestClassLoader() {
  88             super();
  89         }
  90 
  91         public TestClassLoader(ClassLoader parent) {
  92             super(parent);
  93         }
  94 
  95         @Override
  96         protected Class<?> findClass(String name) throws ClassNotFoundException {
  97             Path p = Paths.get(System.getProperty("test.classes", "."));
  98 
  99             try {
 100                 byte[] bb = Files.readAllBytes(p.resolve("foo/Foo.class"));
 101                 return defineClass(name, bb, 0, bb.length);
 102             } catch (IOException e) {
 103                 throw new UncheckedIOException(e);
 104             }
 105         }
 106         @Override
 107         protected Class<?> loadClass(String cn, boolean resolve) throws ClassNotFoundException {
 108             if (!cn.equals("foo.Foo"))
 109                 return super.loadClass(cn, resolve);
 110             return findClass(cn);
 111         }
 112 
 113     }
 114 }
 115 
 116