unittest: add assertIsNone() and assertIsNotNone() methods to TestCase

unittest/metadata.txt

@@ -1,3 +1,3 @@
 srctype = micropython-lib
 type = module
-version = 0.1
+version = 0.2

unittest/setup.py

@@ -6,7 +6,7 @@ from setuptools import setup
 
 
 setup(name='micropython-unittest',
-      version='0.1',
+      version='0.2',
       description='unittest module for MicroPython',
       long_description="This is a module reimplemented specifically for MicroPython standard library,\nwith efficient and lean design in mind. Note that this module is likely work\nin progress and likely supports just a subset of CPython's corresponding\nmodule. Please help with the development if you are interested in this\nmodule.",
       url='https://github.com/micropython/micropython/issues/405',

unittest/test_unittest.py

@@ -72,6 +72,16 @@ class TestUnittestAssertions(unittest.TestCase):
         with self.assertRaises(AssertionError):
             self.assertIsNot(None, None)
 
+    def testIsNone(self):
+        self.assertIsNone(None)
+        with self.assertRaises(AssertionError):
+            self.assertIsNone(0)
+
+    def testIsNotNone(self):
+        self.assertIsNotNone(0)
+        with self.assertRaises(AssertionError):
+            self.assertIsNotNone(None)
+
     def testTrue(self):
         self.assertTrue(True)
         with self.assertRaises(AssertionError):

unittest/unittest.py

@@ -83,6 +83,16 @@ class TestCase:
             msg = "%r is %r" % (x, y)
         assert x is not y, msg
 
+    def assertIsNone(self, x, msg=''):
+        if not msg:
+            msg = "%r is not None" % x
+        assert x is None, msg
+
+    def assertIsNotNone(self, x, msg=''):
+        if not msg:
+            msg = "%r is None" % x
+        assert x is not None, msg
+
     def assertTrue(self, x, msg=''):
         if not msg:
             msg = "Expected %r to be True" % x