[test/spec] Don't pollute repo, and add old demo.

.gitignore

@@ -10,9 +10,12 @@ _build/
 _devbuild/
 !opy/_regtest/src/_devbuild/
 _deps/
+# for mycpp
+_gen/
 _release/
-libc.so
 fastlex.so
+libc.so
 line_input.so
+posix_.so
 # Python build support
 build/temp.*

spec/01-char-class.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+#
+# Usage:
+#   ./01-char-class.sh <function name>
+
+set -o nounset
+set -o pipefail
+set -o errexit
+
+demo() {
+  [[ a == [a] ]]
+  [[ a != [^a] ]]
+
+  [[ a == [ab] ]]
+  [[ a != [^ab] ]]
+
+  [[ a == [[:alpha:]] ]]
+  [[ a != [^[:alpha:]] ]]
+  [[ 0 == [^[:alpha:]] ]]
+
+  # NOTE: there is only one negation.  You can't mix them.
+  [[ 0 == [^[:alpha:]] ]]
+
+  echo
+  echo 'ALL PASSED'
+}
+
+"$@"

spec/alias.test.sh

@@ -478,6 +478,7 @@ four
 ## END
 
 #### Alias and command sub (bug regression)
+cd $TMP
 shopt -s expand_aliases
 echo foo bar > tmp.txt
 alias a=argv.py