Stzx commented on a change in pull request #449: documentation related to the 
issue LANG-696
URL: https://github.com/apache/commons-lang/pull/449#discussion_r318364989
 
 

 ##########
 File path: src/test/java/org/apache/commons/lang3/ClassUtilsTest.java
 ##########
 @@ -513,20 +516,34 @@ public void test_getShortCanonicalName_Object() {
 
     @Test
     public void test_getShortCanonicalName_String() {
+        assertEquals("", ClassUtils.getShortCanonicalName((String)null));
+        assertEquals("Map.Entry", 
ClassUtils.getShortCanonicalName(java.util.Map.Entry.class.getName()));
+        assertEquals("Entry", 
ClassUtils.getShortCanonicalName(java.util.Map.Entry.class.getCanonicalName()));
         assertEquals("ClassUtils", 
ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils"));
         assertEquals("ClassUtils[]", 
ClassUtils.getShortCanonicalName("[Lorg.apache.commons.lang3.ClassUtils;"));
         assertEquals("ClassUtils[][]", 
ClassUtils.getShortCanonicalName("[[Lorg.apache.commons.lang3.ClassUtils;"));
         assertEquals("ClassUtils[]", 
ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils[]"));
         assertEquals("ClassUtils[][]", 
ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils[][]"));
         assertEquals("int[]", ClassUtils.getShortCanonicalName("[I"));
+        assertEquals("int[]", 
ClassUtils.getShortCanonicalName(int[].class.getCanonicalName()));
+        assertEquals("int[]", 
ClassUtils.getShortCanonicalName(int[].class.getName()));
         assertEquals("int[][]", ClassUtils.getShortCanonicalName("[[I"));
         assertEquals("int[]", ClassUtils.getShortCanonicalName("int[]"));
         assertEquals("int[][]", ClassUtils.getShortCanonicalName("int[][]"));
 
-        // Inner types
+        // this is to demonstrate that the documentation and the naming of the 
methods
+        // uses the class name and canonical name totally mixed up, which 
cannot be
+        // fixed without backward compatibility break
+        assertEquals("int[]", int[].class.getCanonicalName());
+        assertEquals("[I", int[].class.getName());
+
+        // Inner types... the problem is that these are not canonical names, 
classes with this name do not even have canonical name
         assertEquals("ClassUtilsTest.6", 
ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$6"));
         assertEquals("ClassUtilsTest.5Named", 
ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$5Named"));
         assertEquals("ClassUtilsTest.Inner", 
ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$Inner"));
+        // demonstrating what a canonical name is... it is a bigger issue to 
clean this up
+        assertEquals("org.apache.commons.lang3.ClassUtilsTest$10", new 
org.apache.commons.lang3.ClassUtilsTest(){}.getClass().getName());
 
 Review comment:
   The addition of the inner class will cause the compilation identifier 
InnerClassName to move backwards. You need to modify
   
   ```
           assertEquals("ClassUtilsTest.10", ClassUtils.getShortClassName(new 
Object() {
               // empty
           }.getClass()));
   ```
   to
   ```
           assertEquals("ClassUtilsTest.12", ClassUtils.getShortClassName(new 
Object() {
               // empty
           }.getClass()));
   ```
   
   and
   
   ```
           assertEquals("ClassUtilsTest.11", ClassUtils.getShortClassName(new 
Object() {
               // empty
           }, "<null>"));
   ```
   to
   ```
           assertEquals("ClassUtilsTest.13", ClassUtils.getShortClassName(new 
Object() {
               // empty
           }, "<null>"));
   ```
   
   And adding warning notes like [487 
lines](https://github.com/apache/commons-lang/blob/479d2c85083fd127b2d4fcfbf184267c76275350/src/test/java/org/apache/commons/lang3/ClassUtilsTest.java#L487).

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