Base64解码在测试环境中返回null

Question

我试图对我的代码运行Unit测试，有一个测试失败了，当我更深入的时候，我注意到Base64.decode()总是在测试环境中返回null。我的具体案例是：

测试方法

public String decode(String jwt){
    System.out.println(jwt); //eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9
    byte[] data = Base64.decode(jwt, Base64.DEFAULT);
    return new String(data, "UTF-8"); //null pointer exception - data = null
}

测试本身：

@Test
public void validateBase64Decode() {
    String stringToTest = "eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9";
    String expectedResult = "{\"sub\": \"1234567890\", \"name\": \"John Doe\", \"admin\": true}";
    Assert.assertEquals(Util.decode(stringToTest), expectedResult);
}

由于空指针异常，测试总是失败：

java.lang.NullPointerException
    at java.lang.String.<init>(String.java:481)

因此，我进一步发现，测试环境中的任何字符串都无法解码：

  @Test
  public void validateBase64Decode() {
         Assert.assertNotNull(Base64.decode("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9", 0));     
} //Test NEVER passes - assertion error

拜托，这里有古鲁吗？怎么了？提前感谢

Answer 1

刚刚用机器人测试了它的工作：

public void testValidateBase64Decode() throws InterruptedException {
    assertTrue("EcoScoreTesterActivity Activity never started", solo.waitForActivity(MainMenuActivity.class, WAIT_FOR_ACTIVITY_TIMEOUT));
    String stringToTest = "eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9";
    String expectedResult = "{\"sub\": \"1234567890\", \"name\": \"John Doe\", \"admin\": true}";
    //The string decode is different as yours
    expectedResult = "{\"sub\":\"1234567890\",\"name\":\"John Doe\",\"admin\":true}";

    assertNotNull(Base64.decode(stringToTest, 0));
    String result = new String(Base64.decode(stringToTest, 0));
    //Show in logcat result of decoding 
    Log.i("Test-Decoding","result+":result);
    assertTrue("Error decoding", result.equals(expectedResult));
}

在你看来，它应该是这样的：

public void testvalidateBase64Decode() {
    String stringToTest = "eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9";
    String expectedResult = "{\"sub\": \"1234567890\", \"name\": \"John Doe\", \"admin\": true}";
    //The string decode is different as yours
    expectedResult = "{\"sub\":\"1234567890\",\"name\":\"John Doe\",\"admin\":true}";
    String result = new String(Base64.decode(stringToTest, 0));
    //Show in logcat result of decoding 
    Log.i("Test-Decoding","result+":result);
    Assert.assertTrue("Error decoding", result.equals(expectedResult));
}

我检查这两个选项，它在我的工作空间中工作

Answer 2

在gradle编译组中添加以下内容：'commons-codec'，name：'commons-codec'，version：'1.9'，并通过导入使用此方法

import org.apache.commons.codec.binary.Base64
new String(Base64.encodeBase64(inData))
Base64.decodeBase64(inString.getBytes())