[wic][PATCH v2] wic: Return error code when wic fails to invoke command

[Ed Bartosh <ed.bartosh@linux.intel.com>]

Return 1 if command doesn't exist or wic is called without
any commmand.
Return result of invoke_command as wic return code.

Added tests for unsupported command and no command.

Fixed typo in test case test02_createhelp spotted by this fix.

[YOCTO #7856]

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
---
 meta/lib/oeqa/selftest/wic.py | 11 ++++++++++-
 scripts/lib/image/help.py     |  2 ++
 scripts/wic                   |  2 +-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/meta/lib/oeqa/selftest/wic.py b/meta/lib/oeqa/selftest/wic.py
index 0e3f1f6..ca8fe99 100644
--- a/meta/lib/oeqa/selftest/wic.py
+++ b/meta/lib/oeqa/selftest/wic.py
@@ -52,7 +52,7 @@ class Wic(oeSelfTest):
 
     def test02_createhelp(self):
         """Test wic create --help"""
-        self.assertEqual(0, runCmd('wic creat --help').status)
+        self.assertEqual(0, runCmd('wic create --help').status)
 
     def test03_listhelp(self):
         """Test wic list --help"""
@@ -82,3 +82,12 @@ class Wic(oeSelfTest):
         self.assertEqual(0, runCmd("wic create directdisk-gpt "
                                    "--image-name core-image-minimal").status)
         self.assertEqual(1, len(glob(self.resultdir + "directdisk-*.direct")))
+
+    def test07_unsupported_subcommand(self):
+        """Test unsupported subcommand"""
+        self.assertEqual(1, runCmd('wic unsupported',
+                         ignore_status=True).status)
+
+    def test08_no_command(self):
+        """Test wic without command"""
+        self.assertEqual(1, runCmd('wic', ignore_status=True).status)
diff --git a/scripts/lib/image/help.py b/scripts/lib/image/help.py
index adfe976..a546c7c 100644
--- a/scripts/lib/image/help.py
+++ b/scripts/lib/image/help.py
@@ -63,11 +63,13 @@ def invoke_subcommand(args, parser, main_command_usage, subcommands):
     if not args:
         logging.error("No subcommand specified, exiting")
         parser.print_help()
+        return 1
     elif args[0] == "help":
         wic_help(args, main_command_usage, subcommands)
     elif args[0] not in subcommands:
         logging.error("Unsupported subcommand %s, exiting\n" % (args[0]))
         parser.print_help()
+        return 1
     else:
         usage = subcommands.get(args[0], subcommand_error)[1]
         subcommands.get(args[0], subcommand_error)[0](args[1:], usage)
diff --git a/scripts/wic b/scripts/wic
index cf96859..d48e45d 100755
--- a/scripts/wic
+++ b/scripts/wic
@@ -305,7 +305,7 @@ def main(argv):
                 parser.print_help()
                 sys.exit(1)
 
-    hlp.invoke_subcommand(args, parser, hlp.wic_help_usage, subcommands)
+    return hlp.invoke_subcommand(args, parser, hlp.wic_help_usage, subcommands)
 
 
 if __name__ == "__main__":
-- 
2.1.4