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https://issues.apache.org/jira/browse/HADOOP-3679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13924273#comment-13924273
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Akira AJISAKA commented on HADOOP-3679:
---------------------------------------

Thanks for taking this issue! The fix of the assertion orderings looks mostly 
good.
Three comments:
{code}
+  public static long ID_EXPECTED=Long.MAX_VALUE;
+
   @Test
   public void testConstructor() {
-    FileHandle handle = new FileHandle(1024);
+    FileHandle handle = new FileHandle(ID_EXPECTED);
{code}
1. This changes the test itself. Would you please separate changing the 
parameter from the patch?
{code}
+    assertEquals(check.length, 
+            dob.getLength());
{code}
2. The lines like the above can be converted to one line.
3. Conversely, this patch adds the lines over 80 characters, so please render 
the lines within 80 chars.

> calls to junit Assert::assertEquals invert arguments, causing misleading 
> error messages, other minor improvements.
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3679
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3679
>             Project: Hadoop Common
>          Issue Type: Test
>          Components: test
>            Reporter: Chris Douglas
>            Priority: Minor
>         Attachments: HADOOP-3679.2.patch, HADOOP-3679.3.patch, 
> HADOOP-3679.patch
>
>
> JUnit Assert::assertEquals takes its expected and actual arguments in a 
> particular order, but many unit tests invert them. The error message from a 
> failed assertion can be misleading.



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