skip non-executable directories

tests/Skipping/setup

@@ -1,3 +1,4 @@
 export tmp=$(mktemp -d)
 export testsuite=$tmp/test
+mkdir -p $testsuite
 touch $testsuite/.urchin

urchin

@@ -140,6 +140,7 @@ recurse() {
 
   validate_strings "${potential_test}" 'Test file names'
 
+  if [ -x "${potential_test}" ]; then
     if [ -d "${potential_test}" ]; then
     (
       cd -- "${potential_test}"
@@ -174,8 +175,7 @@ recurse() {
       wait
       if test -f teardown_dir; then . ./teardown_dir; fi
     )
-  else
-    if [ -x "${potential_test}" ]; then
+    elif [ -f "${potential_test}" ]; then
       cd -- "$(dirname -- "${potential_test}")"
 
       # Determine the environment variable to define for test scripts
@@ -234,11 +234,13 @@ recurse() {
         fi
       done < "${shell_list}"
       wait
+    else
+      echo "${potential_test}: Neither file nor directory!?" > /dev/stderr
+    fi
   else
     # Shell is ''
     printf "${potential_test}\t\tskip\t0\n" >> "${urchin_tmp}"/log
   fi
-  fi
 }
 
 report_outcome() {