simplify file existence check with os.path.isfile()

Change-Id: I89d15e18c588c27ab41596119d5288cba6e4e02d
Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>

1 files changed, 11 insertions, 16 deletions

diff --git a/dovetail/cli/commands/cli_testcase.py b/dovetail/cli/commands/cli_testcase.py
index 6fe789f7..7529765f 100644
--- a/dovetail/cli/commands/cli_testcase.py
+++ b/dovetail/cli/commands/cli_testcase.py
@@ -60,23 +60,18 @@ class CliTestcase(object):
             else:
                 click.echo("No testsuite defined yet in dovetail!!!")
 
-    def show_testcase(self, testcase):
-        abs_testcase_path = constants.TESTCASE_PATH
-        if testcase.startswith("dovetail."):
-            testcase_yml = testcase[9:] + '.yml'
+    def show_testcase(self, name):
+        tc_path = os.path.join(
+            constants.TESTCASE_PATH,
+            "%s.yml" % (name[9:] if name.startswith('dovetail.') else name))
+        if os.path.isfile(tc_path):
+            with open(tc_path, 'r') as stream:
+                try:
+                    click.echo(stream.read())
+                except yaml.YAMLError as exc:
+                    click.echo(exc)
         else:
-            testcase_yml = testcase + '.yml'
-        for root, dirs, files in os.walk(abs_testcase_path):
-            if testcase_yml in files:
-                testcase_path = os.path.join(abs_testcase_path, testcase_yml)
-                with open(testcase_path, 'r') as stream:
-                    try:
-                        click.echo(stream.read())
-                    except yaml.YAMLError as exc:
-                        click.echo(exc)
-            else:
-                click.echo("testcase %s does not exist or not supported"
-                           % testcase)
+            click.echo("testcase %s not exist or not supported" % name)
 
     def run(self, args_str):
         options = ''