adds valueholder tests and fixes.

tests/util/test_objects.py

@@ -0,0 +1,56 @@
+from bonobo.util.objects import Wrapper, get_name, ValueHolder
+
+
+class foo:
+    pass
+
+
+class bar:
+    __name__ = 'baz'
+
+
+def test_get_name():
+    assert get_name(42) == 'int'
+    assert get_name('eat at joe.') == 'str'
+    assert get_name(str) == 'str'
+    assert get_name(object) == 'object'
+    assert get_name(get_name) == 'get_name'
+    assert get_name(foo) == 'foo'
+    assert get_name(foo()) == 'foo'
+    assert get_name(bar) == 'bar'
+    assert get_name(bar()) == 'baz'
+
+
+def test_wrapper_name():
+    assert get_name(Wrapper(42)) == 'int'
+    assert get_name(Wrapper('eat at joe.')) == 'str'
+    assert get_name(Wrapper(str)) == 'str'
+    assert get_name(Wrapper(object)) == 'object'
+    assert get_name(Wrapper(foo)) == 'foo'
+    assert get_name(Wrapper(foo())) == 'foo'
+    assert get_name(Wrapper(bar)) == 'bar'
+    assert get_name(Wrapper(bar())) == 'baz'
+    assert get_name(Wrapper(get_name)) == 'get_name'
+
+
+def test_valueholder():
+    x = ValueHolder(42)
+    assert x == 42
+    x += 1
+    assert x == 43
+    assert x + 1 == 44
+    assert x == 43
+
+    y = ValueHolder(44)
+    assert y == 44
+    y -= 1
+    assert y == 43
+    assert y - 1 == 42
+    assert y == 43
+
+    assert y == x
+    assert y is not x
+    assert repr(x) == repr(y) == repr(43)
+
+
+