EqualityTupleMixin impl, use everywhere we were doing tuple compares

tests/test_octodns_equality.py

@@ -0,0 +1,68 @@
+#
+#
+#
+
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
+from unittest import TestCase
+
+from octodns.equality import EqualityTupleMixin
+
+
+class TestEqualityTupleMixin(TestCase):
+
+    def test_basics(self):
+
+        class Simple(EqualityTupleMixin):
+
+            def __init__(self, a, b, c):
+                self.a = a
+                self.b = b
+                self.c = c
+
+            def _equality_tuple(self):
+                return (self.a, self.b)
+
+        one = Simple(1, 2, 3)
+        same = Simple(1, 2, 3)
+        matches = Simple(1, 2, 'ignored')
+        doesnt = Simple(2, 3, 4)
+
+        # equality
+        self.assertEquals(one, one)
+        self.assertEquals(one, same)
+        self.assertEquals(same, one)
+        # only a & c are considered
+        self.assertEquals(one, matches)
+        self.assertEquals(matches, one)
+        self.assertNotEquals(one, doesnt)
+        self.assertNotEquals(doesnt, one)
+
+        # lt
+        self.assertTrue(one < doesnt)
+        self.assertFalse(doesnt < one)
+        self.assertFalse(one < same)
+
+        # le
+        self.assertTrue(one <= doesnt)
+        self.assertFalse(doesnt <= one)
+        self.assertTrue(one <= same)
+
+        # gt
+        self.assertFalse(one > doesnt)
+        self.assertTrue(doesnt > one)
+        self.assertFalse(one > same)
+
+        # ge
+        self.assertFalse(one >= doesnt)
+        self.assertTrue(doesnt >= one)
+        self.assertTrue(one >= same)
+
+    def test_not_implemented(self):
+
+        class MissingMethod(EqualityTupleMixin):
+            pass
+
+        with self.assertRaises(NotImplementedError):
+            MissingMethod() == MissingMethod()