SFTP: add a comment about a subtle interaction between OverwriteableFileConsumer...

[tahoe-lafs/tahoe-lafs.git] / src / allmydata / test / test_sftp.py

diff --git a/src/allmydata/test/test_sftp.py b/src/allmydata/test/test_sftp.py
index 6095b18f22dce1786f45d0fd82a8e305b53d898f..a45d71d0740431dceb8a3e6237b34d3f616b18fc 100644 (file)
--- a/src/allmydata/test/test_sftp.py
+++ b/src/allmydata/test/test_sftp.py
@@ -913,6 +913,9 @@ class Handler(GridTestMixin, ShouldFailMixin, ReallyEqualMixin, unittest.TestCas
                       self.handler.openFile("small", sftp.FXF_READ | sftp.FXF_WRITE, {}))
         def _read_write(rwf):
             d2 = rwf.writeChunk(8, "0123")
+            # test immediate read starting after the old end-of-file
+            d2.addCallback(lambda ign: rwf.readChunk(11, 1))
+            d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "3"))
             d2.addCallback(lambda ign: rwf.readChunk(0, 100))
             d2.addCallback(lambda data: self.failUnlessReallyEqual(data, "012345670123"))
             d2.addCallback(lambda ign: rwf.close())