--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test.py	Wed Sep 24 16:47:18 2008 -0700
@@ -0,0 +1,153 @@
+import sys
+import os
+import tempfile
+import subprocess
+import dis
+
+import json
+
+def disassemble(co, lasti=-1):
+    """Disassemble a code object and return a JSON-able dictionary
+    of its representation.  This function is a slightly modified version
+    of dis.disassemble()."""
+
+    code = co.co_code
+    labels = dis.findlabels(code)
+    linestarts = dict(dis.findlinestarts(co))
+    n = len(code)
+    i = 0
+    extended_arg = 0
+    free = None
+
+    op_infos = []
+    bytes_to_op_infos = {}
+
+    while i < n:
+        op_info = {}
+        op_infos.append(op_info)
+        bytes_to_op_infos[i] = len(op_infos) - 1
+
+        c = code[i]
+        op = ord(c)
+        if i in linestarts:
+            op_info['line'] = linestarts[i]
+
+        op_info['op'] = dis.opname[op]
+        i = i+1
+        if op >= dis.HAVE_ARGUMENT:
+            oparg = ord(code[i]) + ord(code[i+1])*256 + extended_arg
+            extended_arg = 0
+            i = i+2
+            if op == dis.EXTENDED_ARG:
+                extended_arg = oparg*65536L
+            op_info['arg'] = oparg
+
+    return {'ops': op_infos,
+            'bytes_to_ops': bytes_to_op_infos}
+
+def exec_js(code, extra_output=None):
+    if extra_output is None:
+        extra_output = {}
+
+    fd, temppath = tempfile.mkstemp('.js')
+    os.close(fd)
+    temp = open(temppath, 'w')
+    temp.write(code.encode('utf-8'))
+    temp.close()
+
+    extra_output['errors'] = []
+
+    BRANCH_LIMIT = '500'
+    OUTPUT_FILENAME = '__temp_output.txt'
+    ERROR_FILENAME = '__temp_input.txt'
+
+    out_file = open(OUTPUT_FILENAME, 'w')
+    err_file = open(ERROR_FILENAME, 'w')
+
+    args = ['js',
+            '-b', BRANCH_LIMIT,
+            '-f', 'json2.js',
+            '-f', 'py.js',
+            '-f', temppath,
+            '-f', 'post.js']
+
+    popen = subprocess.Popen(args,
+                             stdout=out_file,
+                             stderr=err_file)
+
+    popen.wait()
+
+    os.remove(temppath)
+
+    out_file = open(OUTPUT_FILENAME, 'r')
+    output = out_file.read()
+
+    err_file = open(ERROR_FILENAME, 'r')
+    error = err_file.read()
+
+    out_file.close()
+    err_file.close()
+
+    os.remove(OUTPUT_FILENAME)
+    os.remove(ERROR_FILENAME)
+
+    output = output.strip()
+
+    if error:
+        extra_output['errors'].append(error)
+
+    try:
+        obj = json.read(output)
+    except Exception, e:
+        extra_output['errors'].append(str(e))
+        obj = None
+
+    return obj
+
+def run(pycode):
+    bytecode = compile(pycode, "<string>", "exec")
+    jsoncode = {'co_consts': bytecode.co_consts,
+                'co_names': bytecode.co_names,
+                'co_code': disassemble(bytecode)}
+    extra = {}
+    retval = exec_js('jsoncode = %s' % json.write(jsoncode), extra)
+    if extra['errors']:
+        print "Errors occurred: "
+        print
+        for error in extra['errors']:
+            print "  * %s" % error,
+        print
+        print
+        print "Disassembly of code:"
+        print
+        dis.dis(bytecode)
+        raise Exception()
+    return retval
+
+def test_assignment_works():
+    """
+    >>> run('a = 1')['locals']['a']
+    1
+    """
+
+    pass
+
+def test_binary_addition_works():
+    """
+    >>> run('a = 1; a = 5 + a')['locals']['a']
+    6
+    """
+
+    pass
+
+def test_global_works():
+    """
+    >>> run('global a; a = 1')['globals']['a']
+    1
+    """
+
+    pass
+
+if __name__ == '__main__':
+    import doctest
+    doctest.testmod()