Added simple unit test for minmaxvalue

azure-cli.pyproj

@@ -37,6 +37,7 @@
     <Compile Include="azure\cli\extensions\__init__.py" />
     <Compile Include="azure\cli\main.py" />
     <Compile Include="azure\cli\tests\test_add_resourcegroup_transform.py" />
+    <Compile Include="command_modules\azure-cli-vm\azure\cli\command_modules\vm\tests\test_custom_vm_commands.py" />
     <Compile Include="command_modules\azure-cli-resource\azure\cli\command_modules\resource\tests\test_api_check.py">
       <SubType>Code</SubType>
     </Compile>

src/azure/cli/main.py

@@ -46,4 +46,7 @@ def main(args, file=sys.stdout): #pylint: disable=redefined-builtin
         return ex.args[1] if len(ex.args) >= 2 else -1
     except KeyboardInterrupt:
         return -1
+    except Exception as ex:
+        logger.error(ex)
+        return -1
 

src/command_modules/azure-cli-vm/azure/cli/command_modules/vm/tests/test_custom_vm_commands.py

@@ -0,0 +1,29 @@
+import json
+import unittest
+from azure.cli.command_modules.vm.custom import MinMaxValue
+
+class Test_Vm_Custom(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        pass
+
+    def test_custom_minmax(self):
+        validator = MinMaxValue(1, 3)
+        self.assertEqual(1, validator(1))
+        self.assertEqual(2, validator(2))
+        self.assertEqual(3, validator(3))
+        self.assertEqual(1, validator('1'))
+        self.assertEqual(2, validator('2'))
+        self.assertEqual(3, validator('3'))
+        with self.assertRaises(ValueError):
+            validator(0)
+        with self.assertRaises(ValueError):
+            validator('0')
+        with self.assertRaises(ValueError):
+            validator(4)
+        with self.assertRaises(ValueError):
+            validator('4')
+
+if __name__ == '__main__':
+    unittest.main()