refactor failure inject

JIRA: DOCTOR-116

Change-Id: I14deda4ccb47414cff139a522a9196b68e92500e
Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>

1 files changed, 91 insertions, 0 deletions

diff --git a/tests/common/utils.py b/tests/common/utils.py
new file mode 100644
index 00000000..38fd97d8
--- /dev/null
+++ b/tests/common/utils.py
@@ -0,0 +1,91 @@
+##############################################################################
+# Copyright (c) 2017 ZTE Corporation and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+import json
+import os
+import paramiko
+
+
+def load_json_file(full_path):
+    """Loads JSON from file
+    :param target_filename:
+    :return:
+    """
+    if not os.path.isfile(full_path):
+        raise Exception('File(%s) does not exist' % full_path)
+
+    with open(full_path, 'r') as file:
+        return json.load(file)
+
+
+def write_json_file(full_path, data):
+    """write JSON from file
+    :param target_filename:
+    :return:
+    """
+
+    with open(full_path, 'w+') as file:
+        file.write(json.dumps(data))
+
+
+class SSHClient(object):
+    def __init__(self, ip, username, password=None, pkey=None,
+                 key_filename=None, log=None, look_for_keys=False,
+                 allow_agent=False):
+        self.client = paramiko.SSHClient()
+        self.client.load_system_host_keys()
+        self.client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+        self.client.connect(ip, username=username, password=password,
+                            pkey=pkey, key_filename=key_filename,
+                            look_for_keys=look_for_keys,
+                            allow_agent=allow_agent)
+        self.log = log
+
+    def __del__(self):
+        self.client.close()
+
+    def ssh(self, command):
+        if self.log:
+            self.log.info("Executing: %s" % command)
+        stdin, stdout, stderr = self.client.exec_command(command)
+        ret = stdout.channel.recv_exit_status()
+        output = list()
+        for line in stdout.read().splitlines():
+            output.append(line.decode('utf-8'))
+        if ret:
+            if self.log:
+                self.log.info("*** FAILED to run command %s (%s)" % (command, ret))
+            raise Exception(
+                "Unable to run \ncommand: %s\nret: %s"
+                % (command, ret))
+        if self.log:
+            self.log.info("*** SUCCESSFULLY run command %s" % command)
+        return ret, output
+
+    def scp(self, source, dest, method='put'):
+        if self.log:
+            self.log.info("Copy %s -> %s" % (source, dest))
+        ftp = self.client.open_sftp()
+        if method == 'put':
+            ftp.put(source, dest)
+        elif method == 'get':
+            ftp.get(source, dest)
+        ftp.close()
+
+
+def run_async(func):
+    from threading import Thread
+    from functools import wraps
+
+    @wraps(func)
+    def async_func(*args, **kwargs):
+        thread = Thread(target=func, args=args, kwargs=kwargs)
+        thread.start()
+        return thread
+
+    return async_func