New Param: ported Param.__repr__() and corresponding unit test

ipalib/parameter.py

@@ -24,6 +24,7 @@ Parameter system for command plugins.
 from types import NoneType
 from plugable import ReadOnly, lock, check_name
 from constants import NULLS, TYPE_ERROR, CALLABLE_ERROR
+from util import make_repr
 
 
 class DefaultFrom(ReadOnly):
@@ -287,6 +288,16 @@ class Param(ReadOnly):
         # And we're done.
         lock(self)
 
+    def __repr__(self):
+        """
+        Return an expresion that could construct this `Param` instance.
+        """
+        return make_repr(
+            self.__class__.__name__,
+            self.param_spec,
+            **self.__kw
+        )
+
     def normalize(self, value):
         """
         Normalize ``value`` using normalizer callback.

tests/test_ipalib/test_parameter.py

@@ -188,6 +188,18 @@ class test_Param(ClassChecker):
         assert str(e) == \
             "Param('my_param'): takes no such kwargs: 'ape', 'great'"
 
+    def test_repr(self):
+        """
+        Test the `ipalib.parameter.Param.__repr__` method.
+        """
+        for name in ['name', 'name?', 'name*', 'name+']:
+            o = self.cls(name)
+            assert repr(o) == 'Param(%r)' % name
+        o = self.cls('name', required=False)
+        assert repr(o) == "Param('name', required=False)"
+        o = self.cls('name', multivalue=True)
+        assert repr(o) == "Param('name', multivalue=True)"
+
     def test_convert(self):
         """
         Test the `ipalib.parameter.Param.convert` method.