Ausgabe der neuen DB Einträge

venv/lib/python3.9/site-packages/twisted/logger/test/test_buffer.py

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+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+Test cases for L{twisted.logger._buffer}.
+"""
+
+from zope.interface.verify import verifyObject, BrokenMethodImplementation
+
+from twisted.trial import unittest
+
+from .._observer import ILogObserver
+from .._buffer import LimitedHistoryLogObserver
+
+
+
+class LimitedHistoryLogObserverTests(unittest.TestCase):
+    """
+    Tests for L{LimitedHistoryLogObserver}.
+    """
+
+    def test_interface(self):
+        """
+        L{LimitedHistoryLogObserver} provides L{ILogObserver}.
+        """
+        observer = LimitedHistoryLogObserver(0)
+        try:
+            verifyObject(ILogObserver, observer)
+        except BrokenMethodImplementation as e:
+            self.fail(e)
+
+
+    def test_order(self):
+        """
+        L{LimitedHistoryLogObserver} saves history in the order it is received.
+        """
+        size = 4
+        events = [dict(n=n) for n in range(size//2)]
+        observer = LimitedHistoryLogObserver(size)
+
+        for event in events:
+            observer(event)
+
+        outEvents = []
+        observer.replayTo(outEvents.append)
+        self.assertEqual(events, outEvents)
+
+
+    def test_limit(self):
+        """
+        When more events than a L{LimitedHistoryLogObserver}'s maximum size are
+        buffered, older events will be dropped.
+        """
+        size = 4
+        events = [dict(n=n) for n in range(size*2)]
+        observer = LimitedHistoryLogObserver(size)
+
+        for event in events:
+            observer(event)
+        outEvents = []
+        observer.replayTo(outEvents.append)
+        self.assertEqual(events[-size:], outEvents)