some example tests. please expand on these

tests/lbrynet/core/test_LBRYMetadata.py

@@ -0,0 +1,102 @@
+import mock
+from lbrynet.core import LBRYMetadata
+
+from twisted.trial import unittest
+
+
+class LBRYFeeFormatTest(unittest.TestCase):
+    def test_fee_created_with_correct_inputs(self):
+        fee_dict = {
+            'USD': {
+                'amount': 10,
+                'address': None
+            }
+        }
+        fee = LBRYMetadata.LBRYFeeFormat(fee_dict)
+        self.assertEqual(10, fee['USD']['amount'])
+
+
+class LBRYFeeTest(unittest.TestCase):
+    def setUp(self):
+        self.patcher = mock.patch('time.time')
+        self.time = self.patcher.start()
+        self.time.return_value = 0
+
+    def tearDown(self):
+        self.time.stop()
+
+    def test_fee_converts_to_lbc(self):
+        fee_dict = {
+            'USD': {
+                'amount': 10,
+                'address': None
+            }
+        }
+        rates = {'BTCLBC': {'spot': 3, 'ts': 2}, 'USDBTC': {'spot': 2, 'ts': 3}}
+        fee = LBRYMetadata.LBRYFee(fee_dict, rates, 0)
+        self.assertEqual(60, fee.to_lbc())
+
+
+class MetadataTest(unittest.TestCase):
+    def test_assertion_if_source_is_missing(self):
+        metadata = {}
+        with self.assertRaises(AssertionError):
+            LBRYMetadata.Metadata(metadata)
+
+    def test_assertion_if_invalid_source(self):
+        metadata = {
+            'sources': {'garbage': None}
+        }
+        with self.assertRaises(AssertionError):
+            LBRYMetadata.Metadata(metadata)
+
+    def test_assertion_if_missing_v001_field(self):
+        metadata = {
+            'sources': [],
+        }
+        with self.assertRaises(AssertionError):
+            LBRYMetadata.Metadata(metadata)
+
+    def test_version_is_001_if_all_fields_are_present(self):
+        metadata = {
+            'sources': [],
+            'title': None,
+            'description': None,
+            'author': None,
+            'language': None,
+            'license': None,
+            'content-type': None,
+        }
+        m = LBRYMetadata.Metadata(metadata)
+        self.assertEquals('0.0.1', m.metaversion)
+
+    def test_assertion_if_there_is_an_extra_field(self):
+        metadata = {
+            'sources': [],
+            'title': None,
+            'description': None,
+            'author': None,
+            'language': None,
+            'license': None,
+            'content-type': None,
+            'extra': None
+        }
+        with self.assertRaises(AssertionError):
+            LBRYMetadata.Metadata(metadata)
+
+    def test_version_is_002_if_all_fields_are_present(self):
+        metadata = {
+            'sources': [],
+            'title': None,
+            'description': None,
+            'author': None,
+            'language': None,
+            'license': None,
+            'content-type': None,
+            'nsfw': None,
+            'ver': None
+        }
+        m = LBRYMetadata.Metadata(metadata)
+        self.assertEquals('0.0.2', m.metaversion)
+
+