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third_party/gsutil/boto/tests/db/test_sequence.py

Index: third_party/gsutil/boto/tests/db/test_sequence.py
diff --git a/third_party/gsutil/boto/tests/db/test_sequence.py b/third_party/gsutil/boto/tests/db/test_sequence.py
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+# Copyright (c) 2010 Chris Moyer http://coredumped.org/
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish, dis-
+# tribute, sublicense, and/or sell copies of the Software, and to permit
+# persons to whom the Software is furnished to do so, subject to the fol-
+# lowing conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
+# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+ 
+
+class TestDBHandler(object):
+    """Test the DBHandler"""
+
+    def setup_class(cls):
+        """Setup this class"""
+        cls.sequences = []
+
+    def teardown_class(cls):
+        """Remove our sequences"""
+        for s in cls.sequences:
+            try:
+                s.delete()
+            except:
+                pass
+
+    def test_sequence_generator_no_rollover(self):
+        """Test the sequence generator without rollover"""
+        from boto.sdb.db.sequence import SequenceGenerator
+        gen = SequenceGenerator("ABC")
+        assert(gen("") == "A")
+        assert(gen("A") == "B")
+        assert(gen("B") == "C")
+        assert(gen("C") == "AA")
+        assert(gen("AC") == "BA")
+
+    def test_sequence_generator_with_rollover(self):
+        """Test the sequence generator with rollover"""
+        from boto.sdb.db.sequence import SequenceGenerator
+        gen = SequenceGenerator("ABC", rollover=True)
+        assert(gen("") == "A")
+        assert(gen("A") == "B")
+        assert(gen("B") == "C")
+        assert(gen("C") == "A")
+
+    def test_sequence_simple_int(self):
+        """Test a simple counter sequence"""
+        from boto.sdb.db.sequence import Sequence
+        s = Sequence()
+        self.sequences.append(s)
+        assert(s.val == 0)
+        assert(s.next() == 1)
+        assert(s.next() == 2)
+        s2 = Sequence(s.id)
+        assert(s2.val == 2)
+        assert(s.next() == 3)
+        assert(s.val == 3)
+        assert(s2.val == 3)
+
+    def test_sequence_simple_string(self):
+        from boto.sdb.db.sequence import Sequence, increment_string
+        s = Sequence(fnc=increment_string)
+        self.sequences.append(s)
+        assert(s.val == "A")
+        assert(s.next() == "B")
+
+    def test_fib(self):
+        """Test the fibonacci sequence generator"""
+        from boto.sdb.db.sequence import fib
+        # Just check the first few numbers in the sequence
+        lv = 0
+        for v in [1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144]:
+            assert(fib(v, lv) == lv+v)
+            lv = fib(v, lv)
+
+    def test_sequence_fib(self):
+        """Test the fibonacci sequence"""
+        from boto.sdb.db.sequence import Sequence, fib
+        s = Sequence(fnc=fib)
+        s2 = Sequence(s.id)
+        self.sequences.append(s)
+        assert(s.val == 1)
+        # Just check the first few numbers in the sequence
+        for v in [1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144]:
+            assert(s.next() == v)
+            assert(s.val == v)
+            assert(s2.val == v) # it shouldn't matter which reference we use since it's garunteed to be consistent
+
+    def test_sequence_string(self):
+        """Test the String incrementation sequence"""
+        from boto.sdb.db.sequence import Sequence, increment_string
+        s = Sequence(fnc=increment_string)
+        self.sequences.append(s)
+        assert(s.val == "A")
+        assert(s.next() == "B")
+        s.val = "Z"
+        assert(s.val == "Z")
+        assert(s.next() == "AA")