new method combox.silo.ComboxSilo.node_rem

The method removes information about a file in the category `type_'
where `type_' can be 'file_created', 'file_modified', 'file_removed',
'file_moved'.

Also wrote tests for it :~(

	modified:   combox/silo.py
	modified:   tests/silo_test.py

2 files changed, 33 insertions, 0 deletions

diff --git a/combox/silo.py b/combox/silo.py
index 38de523..0968d12 100644
--- a/combox/silo.py
+++ b/combox/silo.py
@@ -176,3 +176,21 @@ class ComboxSilo(object):
             except KeyError, e:
                 # file_ info not there under type_ dict.
                 return None
+
+
+    def node_rem(self, type_, file_):
+        """
+        Removes information about the shard of `file_'.
+
+        type_: 'file_created', 'file_modified', 'file_moved', 'file_deleted'
+        file_: path of the file_ in combox directory.
+        """
+
+        self.reload()
+        with self.lock:
+            try:
+                return self.db.dpop(type_, file_)
+            except KeyError, e:
+                # means file_'s info was already removed.
+                # do nothing
+                pass
diff --git a/tests/silo_test.py b/tests/silo_test.py
index 067dd51..983ef1b 100644
--- a/tests/silo_test.py
+++ b/tests/silo_test.py
@@ -198,6 +198,21 @@ class TestSilo(object):
         assert_equal(2, silo.node_get('file_created', self.LOREM))
 
 
+    def test_csilo_noderem(self):
+        """Tests node_rem method in ComboxSilo class
+        """
+        silo = ComboxSilo(self.config, self.silo_lock)
+
+        silo.node_set('file_created', self.LOREM)
+        silo.node_set('file_created', self.LOREM)
+        silo.node_set('file_created', self.LOREM)
+        silo.node_set('file_created', self.LOREM)
+        assert_equal(4, silo.node_get('file_created', self.LOREM))
+
+        removed = silo.node_rem('file_created', self.LOREM)
+        assert_equal(True, removed)
+        assert_equal(None, silo.node_get('file_created', self.LOREM))
+
     def teardown(self):
         """Cleans up things after each test in this class"""