add 3 testcases for mkd_basename (-b flag in the markdown program)

basename.c

@@ -20,7 +20,7 @@ e_basename(const char *string, const int size, void *context)
     char *ret;
     char *base = (char*)context;
 
-    if ( base && string && string[0] == '/' && (ret=malloc(strlen(base)+size+2)) ) {
+    if ( base && string && (string[0] == '/') && (ret=malloc(strlen(base)+size+2)) ) {
 	strcpy(ret, base);
 	strncat(ret, string, size);
 	return ret;

tests/e_url.t

@@ -0,0 +1,13 @@
+. tests/functions.sh
+
+title "mkd_basename (e_url)"
+
+rc=0
+MARKDOWN_FLAGS=
+
+try -bHOHO 'empty []() with baseurl' '[]()' '<p><a href="HOHO"></a></p>'
+try -bHOHO '[]() with full url' '[](http://foo)' '<p><a href="http://foo"></a></p>'
+try -bHOHO '[]() with url fragment' '[](/foo)'   '<p><a href="HOHO/foo"></a></p>'
+
+summary $0
+exit $rc