ExtUtils::ParseXS: extend alias test

This test checks that the correct warnings are issued when an XSUB tries
to define multiple aliases with the same value. This commit extends the
test slightly to have multiple aliases (including an alias matching the
function name) all mapped to in index 0.

The main point of generating these extra warnings is that the warnings
accidentally list the XSUB function's name ('do') multiple times in the
warning message. The next commit will fix that.

Author: iabyn

dist/ExtUtils-ParseXS/t/001-basic.t

@@ -263,7 +263,12 @@ like $stderr, '/No INPUT definition/', "Exercise typemap error";
     . "Warning: Aliases 'docks' and 'dox', 'lox' have"
     . " identical values of 1 in XSAlias.xs, line 11\n"
     . "Warning: Aliases 'xunx' and 'do' have identical values"
-    . " of 0 - the base function in XSAlias.xs, line 13\n",
+    . " of 0 - the base function in XSAlias.xs, line 13\n"
+    . "Warning: Aliases 'do' and 'xunx', 'do' have identical values"
+    . " of 0 - the base function in XSAlias.xs, line 14\n"
+    . "Warning: Aliases 'xunx2' and 'do', 'xunx', 'do' have"
+    . " identical values of 0 - the base function in XSAlias.xs, line 15\n"
+    ,
     "Saw expected warnings from XSAlias.xs in AUTHOR_WARNINGS mode";
 
   my $expect = quotemeta(<<'EOF_CONTENT');

dist/ExtUtils-ParseXS/t/XSAlias.xs

@@ -11,6 +11,8 @@ ALIAS:
     docks = 1
     dachs => lox
     xunx = 0
+    do   = 0
+    xunx2 = 0
     xukes => do
 CODE:
 {