isolateserver: DiskCache format v2

client/tests/isolateserver_test.py

Index: client/tests/isolateserver_test.py
diff --git a/client/tests/isolateserver_test.py b/client/tests/isolateserver_test.py
index 550e16108a942bbb6f5a94760fae5b7ed08a3003..88f8bf7dad5d85ea97d21f687635952e9bedc128 100755
--- a/client/tests/isolateserver_test.py
+++ b/client/tests/isolateserver_test.py
@@ -1248,8 +1248,11 @@ class DiskCacheTest(TestCase):
     # TODO(maruel): Test the following.
     #cache.touch()
 
+    self.now = 0.0
+
   def get_cache(self):
-    return isolateserver.DiskCache(self.tempdir, self._policies, self._algo)
+    return isolateserver.DiskCache(
+        self.tempdir, self._policies, self._algo, time_fn=lambda: self.now)
 
   def to_hash(self, content):
     return self._algo(content).hexdigest(), content
@@ -1293,9 +1296,9 @@ class DiskCacheTest(TestCase):
     cache = self.get_cache()
     self.assertEqual([], sorted(cache._lru._items.iteritems()))
     self.assertEqual(
-        sorted([h_a, u'state.json']), sorted(os.listdir(self.tempdir)))
+        sorted([h_a, u'state.json', u'VERSION']), sorted(os.listdir(self.tempdir)))
     cache.cleanup()
-    self.assertEqual([u'state.json'], os.listdir(self.tempdir))
+    self.assertEqual([u'state.json', u'VERSION'], os.listdir(self.tempdir))
 
   def test_policies_active_trimming(self):
     # Start with a larger cache, add many object.
@@ -1316,7 +1319,7 @@ class DiskCacheTest(TestCase):
       # cache policies. As long as there is free space, this is fine.
       cache.write(h_b, 'b')
       expected = sorted(((h_a, 1), (h_large, len(large)), (h_b, 1)))
-      self.assertEqual(expected, sorted(cache._lru._items.iteritems()))
+      self.assertEqual(expected, sorted(cache._sizes()))
       self.assertEqual(h_a, cache._protected)
       self.assertEqual(1000, cache._free_disk)
       self.assertEqual(0, cache.initial_number_items)
@@ -1330,7 +1333,8 @@ class DiskCacheTest(TestCase):
     # At this point, after the implicit trim in __exit__(), h_a and h_large were
     # evicted.
     self.assertEqual(
-        sorted([h_b, h_c, u'state.json']), sorted(os.listdir(self.tempdir)))
+        set([h_b[:2], h_c[:2], u'state.json', u'VERSION']),
+        set(os.listdir(self.tempdir)))
 
     # Allow 3 items and 101 bytes so h_large is kept.
     self._policies = isolateserver.CachePolicies(101, 1000, 3)
@@ -1340,19 +1344,41 @@ class DiskCacheTest(TestCase):
       self.assertEqual(2, cache.initial_size)
 
     self.assertEqual(
-        sorted([h_b, h_c, h_large, u'state.json']),
-        sorted(os.listdir(self.tempdir)))
+        set([h_b[:2], h_c[:2], h_large[:2], u'state.json', u'VERSION']),
+        set(os.listdir(self.tempdir)))
 
     # Assert that trimming is done in constructor too.
     self._policies = isolateserver.CachePolicies(100, 1000, 2)
     with self.get_cache() as cache:
-      expected = collections.OrderedDict([(h_c, 1), (h_large, len(large))])
-      self.assertEqual(expected, cache._lru._items)
+      self.assertEqual(
+          [(h_c, 1), (h_large, len(large))],
+          list(cache._sizes()))
       self.assertEqual(None, cache._protected)
       self.assertEqual(1101, cache._free_disk)
       self.assertEqual(2, cache.initial_number_items)
       self.assertEqual(100, cache.initial_size)
 
+  def test_timestamp(self):
+    self._free_disk = 1100
+    cache = self.get_cache()
+    with cache:
+      self.now = 1
+      cache.write('deadbeef', '1')
+
+      self.now = 2
+      cache.write('badcoffee', '2')
+
+    self.assertEqual(
+      [
+        ('deadbeef', [1, 1]),
+        ('badcoffee', [1, 2]),
+      ],
+      cache._lru._items.items()
+    )
+
+    loaded = self.get_cache()
+    self.assertEqual(cache._lru._items, loaded._lru._items)
+
 
 def clear_env_vars():
   for e in ('ISOLATE_DEBUG', 'ISOLATE_SERVER'):