[Checkins] SVN: BTrees/branches/pure_python/ More coverage for _BucketBase.

[Tres Seaver]

Log message for revision 128257:
  More coverage for _BucketBase.

Changed:
  _U  BTrees/branches/pure_python/
  U   BTrees/branches/pure_python/BTrees/tests/test____BTree.py

-=-
Modified: BTrees/branches/pure_python/BTrees/tests/test____BTree.py
===================================================================
--- BTrees/branches/pure_python/BTrees/tests/test____BTree.py	2012-11-12 18:37:26 UTC (rev 128256)
+++ BTrees/branches/pure_python/BTrees/tests/test____BTree.py	2012-11-12 18:37:27 UTC (rev 128257)
@@ -29,7 +29,39 @@
         self.assertEqual(bucket._next, None)
         self.assertEqual(bucket.size, 0)
 
+    def test__deleteNextBucket_none(self):
+        bucket = self._makeOne()
+        bucket._deleteNextBucket() # no raise
+        self.assertTrue(bucket._next is None)
 
+    def test__deleteNextBucket_one(self):
+        bucket1 = self._makeOne()
+        bucket2 = bucket1._next = self._makeOne()
+        bucket1._deleteNextBucket() # no raise
+        self.assertTrue(bucket1._next is None)
+
+    def test__deleteNextBucket_two(self):
+        bucket1 = self._makeOne()
+        bucket2 = bucket1._next = self._makeOne()
+        bucket3 = bucket2._next = self._makeOne()
+        bucket1._deleteNextBucket() # no raise
+        self.assertTrue(bucket1._next is bucket3)
+
+    def test__search_empty(self):
+        bucket = self._makeOne()
+        self.assertEqual(bucket._search('nonesuch'), -1)
+
+    def test__search_nonempty_miss(self):
+        bucket = self._makeOne()
+        bucket._keys = ['alpha', 'bravo', 'charlie', 'delta', 'echo']
+        self.assertEqual(bucket._search('candy'), -2)
+
+    def test__search_nonempty_hit(self):
+        bucket = self._makeOne()
+        bucket._keys = ['alpha', 'bravo', 'charlie', 'delta', 'echo']
+        self.assertEqual(bucket._search('charlie'), 2)
+
+
 def test_suite():
     return unittest.TestSuite((
         unittest.makeSuite(_BucketBaseTests),