From 4a3df3b683d684cb4696f1271920890fba6f4558 Mon Sep 17 00:00:00 2001 From: robk-tahoe <robk-tahoe@allmydata.com> Date: Fri, 3 Oct 2008 15:35:50 -0700 Subject: [PATCH] fuse/runtests: added linear write tests for various block sizes unit tests to test writing contiguous blocks linearly through the file, for a variety of block sizes; 'tiny_file' is an entire file fitting within a single io block / write operation. 'linear_{small,large}_writes' test a 1Mb file written with each write operation containing significantly less or more, respecitvely, data than fuse will pass into the implementation as a single operation (which on the mac at least is 64Kib) --- contrib/fuse/runtests.py | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/contrib/fuse/runtests.py b/contrib/fuse/runtests.py index 0a25a40e..ef9db4a5 100644 --- a/contrib/fuse/runtests.py +++ b/contrib/fuse/runtests.py @@ -449,6 +449,39 @@ class SystemTest (object): tmpl = 'Expected file contents %r but found %r' raise TestFailure(tmpl, body, uploaded_body) + def test_write_tiny_file(self, testcap, testdir): + self._write_test_linear(testcap, testdir, name='tiny.junk', bs=2**9, sz=2**9) + + def test_write_linear_small_writes(self, testcap, testdir): + self._write_test_linear(testcap, testdir, name='large_linear.junk', bs=2**9, sz=2**20) + + def test_write_linear_large_writes(self, testcap, testdir): + # at least on the mac, large io block sizes are reduced to 64k writes through fuse + self._write_test_linear(testcap, testdir, name='small_linear.junk', bs=2**18, sz=2**20) + + def _write_test_linear(self, testcap, testdir, name, bs, sz): + body = os.urandom(sz) + try: + path = os.path.join(testdir, name) + f = file(path, 'w') + except Exception, err: + tmpl = 'Could not open file for write at %r: %r' + raise TestFailure(tmpl, path, err) + try: + for posn in range(0,sz,bs): + f.write(body[posn:posn+bs]) + f.close() + except Exception, err: + tmpl = 'Could not write to file %r: %r' + raise TestFailure(tmpl, path, err) + + self._check_write(testcap, name, body) + + def _check_write(self, testcap, name, expected_body): + uploaded_body = self.get_file(testcap, name) + if uploaded_body != expected_body: + tmpl = 'Expected file contents %r but found %r' + raise TestFailure(tmpl, expected_body, uploaded_body) # Utilities: def run_tahoe(self, *args): -- 2.45.2