Implement initial Python bindings for Open vSwitch database.

[openvswitch] / tests / test-json.py

diff --git a/tests/test-json.py b/tests/test-json.py
new file mode 100644 (file)
index 0000000..bffb88a
--- /dev/null
+++ b/tests/test-json.py
@@ -0,0 +1,92 @@
+# Copyright (c) 2009, 2010 Nicira Networks.
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+# 
+#     http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import codecs
+import getopt
+import sys
+
+import ovs.json
+
+def print_json(json):
+    if type(json) in [str, unicode]:
+        print "error: %s" % json
+        return False
+    else:
+        ovs.json.to_stream(json, sys.stdout)
+        sys.stdout.write("\n")
+        return True
+
+def parse_multiple(stream):
+    buf = stream.read(4096)
+    ok = True
+    parser = None
+    while len(buf):
+        if parser is None and buf[0] in " \t\r\n":
+            buf = buf[1:]
+        else:
+            if parser is None:
+                parser = ovs.json.Parser()
+            n = parser.feed(buf)
+            buf = buf[n:]
+            if len(buf):
+                if not print_json(parser.finish()):
+                    ok = False
+                parser = None
+        if len(buf) == 0:
+            buf = stream.read(4096)
+    if parser and not print_json(parser.finish()):
+        ok = False
+    return ok
+
+def main(argv):
+    argv0 = argv[0]
+
+    # Make stdout and stderr UTF-8, even if they are redirected to a file.
+    sys.stdout = codecs.getwriter("utf-8")(sys.stdout)
+    sys.stderr = codecs.getwriter("utf-8")(sys.stderr)
+
+    try:
+        options, args = getopt.gnu_getopt(argv[1:], '', ['multiple'])
+    except getopt.GetoptError, geo:
+        sys.stderr.write("%s: %s\n" % (argv0, geo.msg))
+        sys.exit(1)
+
+    multiple = False
+    for key, value in options:
+        if key == '--multiple':
+            multiple = True
+        else:
+            sys.stderr.write("%s: unhandled option %s\n" % (argv0, key))
+            sys.exit(1)
+
+    if len(args) != 1:
+        sys.stderr.write("usage: %s [--multiple] INPUT.json\n" % argv0)
+        sys.exit(1)
+
+    input_file = args[0]
+    if input_file == "-":
+        stream = sys.stdin
+    else:
+        stream = open(input_file, "r")
+
+    if multiple:
+        ok = parse_multiple(stream)
+    else:
+        ok = print_json(ovs.json.from_stream(stream))
+
+    if not ok:
+        sys.exit(1)
+
+if __name__ == '__main__':
+    main(sys.argv)