add "yardstick testcase list" command function

"yardstick testcase list" will list test cases info(Name, Description)
 in tests/OPNFV/test_cases/

Change-Id: Icf2e6a803d90d33012f009519e47e750bfd57489
JIRA:-
Signed-off-by: kubi <jean.gaoliang@huawei.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/yardstick/cmd/commands/testcase.py b/yardstick/cmd/commands/testcase.py
new file mode 100644
index 000000000..c37fcc214
--- /dev/null
+++ b/yardstick/cmd/commands/testcase.py
@@ -0,0 +1,91 @@
+##############################################################################
+# Copyright (c) 2015 Huawei Technologies Co.,Ltd 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
+##############################################################################
+
+""" Handler for yardstick command 'testcase' """
+from yardstick.cmd import print_hbar
+from yardstick.common.task_template import TaskTemplate
+import os
+import yaml
+import sys
+
+
+class TestcaseCommands(object):
+    '''Testcase commands.
+
+       Set of commands to discover and display test cases.
+    '''
+    def __init__(self):
+        self.test_case_path = 'tests/opnfv/test_cases/'
+        self.testcase_list = []
+
+    def do_list(self, args):
+        '''List existing test cases'''
+
+        try:
+            testcase_files = os.listdir(self.test_case_path)
+        except Exception as e:
+            print(("Failed to list dir:\n%(path)s\n%(err)s\n")
+                  % {"path": self.test_case_path, "err": e})
+            raise e
+        testcase_files.sort()
+
+        for testcase_file in testcase_files:
+            record = self._get_record(testcase_file)
+            self.testcase_list.append(record)
+
+        self._format_print(self.testcase_list)
+        return True
+
+    def _get_record(self, testcase_file):
+
+        try:
+            with open(self.test_case_path + testcase_file) as f:
+                try:
+                    testcase_info = f.read()
+                except Exception as e:
+                    print(("Failed to load test cases:"
+                           "\n%(testcase_file)s\n%(err)s\n")
+                          % {"testcase_file": testcase_file, "err": e})
+                    raise e
+                description, installer, deploy_scenarios = \
+                    self._parse_testcase(testcase_info)
+
+                record = {'Name': testcase_file.split(".")[0],
+                          'Description': description,
+                          'installer': installer,
+                          'deploy_scenarios': deploy_scenarios}
+                return record
+        except IOError as ioerror:
+            sys.exit(ioerror)
+
+    def _parse_testcase(self, testcase_info):
+
+        kw = {}
+        rendered_testcase = TaskTemplate.render(testcase_info, **kw)
+        testcase_cfg = yaml.load(rendered_testcase)
+        test_precondition = testcase_cfg.get('precondition', None)
+        installer_type = 'all'
+        deploy_scenarios = 'all'
+        if test_precondition is not None:
+            installer_type = test_precondition.get('installer_type', 'all')
+            deploy_scenarios = test_precondition.get('deploy_scenarios', 'all')
+
+        description = testcase_info.split("\n")[2][1:].strip()
+        return description, installer_type, deploy_scenarios
+
+    def _format_print(self, testcase_list):
+        '''format output'''
+
+        print_hbar(88)
+        print("| %-21s | %-60s" % ("Testcase Name", "Description"))
+        print_hbar(88)
+        for testcase_record in testcase_list:
+            print "| %-16s | %-60s" % (testcase_record['Name'],
+                                       testcase_record['Description'])
+        print_hbar(88)