[Libguestfs] [PATCH nbdkit v3 7/7] tests: Test the Python plugin thoroughly.
Richard W.M. Jones
rjones at redhat.com
Sat Nov 23 13:26:39 UTC 2019
This tests the Python plugin thoroughly by issuing client commands
through libnbd and checking we get the expected results.
---
.gitignore | 1 +
README | 2 +
tests/Makefile.am | 15 +--
tests/test-lang-plugins.c | 3 +-
tests/test-python-plugin.py | 139 +++++++++++++++++++++
tests/test-python.sh | 49 ++++++++
tests/test.py | 60 ---------
tests/test_python.py | 236 ++++++++++++++++++++++++++++++++++++
8 files changed, 433 insertions(+), 72 deletions(-)
diff --git a/.gitignore b/.gitignore
index b25ac7f..e25bd99 100644
--- a/.gitignore
+++ b/.gitignore
@@ -71,6 +71,7 @@ Makefile.in
/server/synopsis.c
/server/test-public
/stamp-h1
+/tests/__pycache__/
/tests/disk
/tests/disk.gz
/tests/disk.xz
diff --git a/README b/README
index 7034fd8..9313f8a 100644
--- a/README
+++ b/README
@@ -130,6 +130,8 @@ For the Python plugin:
- python development libraries
+ - python unittest to run the test suite
+
For the OCaml plugin:
- OCaml >= 4.02.2
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 13cd8f3..848cc07 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -115,7 +115,9 @@ EXTRA_DIST = \
test-pattern-largest-for-qemu.sh \
test-python-exception.sh \
test.pl \
- test.py \
+ test_python.py \
+ test-python-plugin.py \
+ test-python.sh \
test-rate.sh \
test-rate-dynamic.sh \
test.rb \
@@ -207,6 +209,7 @@ EXTRA_PROGRAMS =
TESTS_ENVIRONMENT = \
PATH=$(abs_top_builddir):$(PATH) \
SRCDIR=$(srcdir) \
+ PYTHON=$(PYTHON) \
LIBGUESTFS_ATTACH_METHOD=appliance \
LIBGUESTFS_DEBUG=1 \
LIBGUESTFS_TRACE=1 \
@@ -787,18 +790,10 @@ endif HAVE_PERL
if HAVE_PYTHON
TESTS += \
+ test-python.sh \
test-python-exception.sh \
test-shebang-python.sh \
$(NULL)
-LIBGUESTFS_TESTS += test-python
-
-test_python_SOURCES = test-lang-plugins.c test.h
-test_python_CFLAGS = \
- -DLANG='"python"' -DSCRIPT='"$(srcdir)/test.py"' \
- $(WARNINGS_CFLAGS) \
- $(LIBGUESTFS_CFLAGS) \
- $(NULL)
-test_python_LDADD = libtest.la $(LIBGUESTFS_LIBS)
endif HAVE_PYTHON
diff --git a/tests/test-lang-plugins.c b/tests/test-lang-plugins.c
index ffb1918..93f9938 100644
--- a/tests/test-lang-plugins.c
+++ b/tests/test-lang-plugins.c
@@ -56,8 +56,7 @@ main (int argc, char *argv[])
*/
s = getenv ("NBDKIT_VALGRIND");
if (s && strcmp (s, "1") == 0 &&
- (strcmp (LANG, "python") == 0 ||
- strcmp (LANG, "ruby") == 0 ||
+ (strcmp (LANG, "ruby") == 0 ||
strcmp (LANG, "tcl") == 0)) {
fprintf (stderr, "%s test skipped under valgrind.\n", LANG);
exit (77); /* Tells automake to skip the test. */
diff --git a/tests/test-python-plugin.py b/tests/test-python-plugin.py
new file mode 100644
index 0000000..d7335bd
--- /dev/null
+++ b/tests/test-python-plugin.py
@@ -0,0 +1,139 @@
+# nbdkit test plugin
+# Copyright (C) 2019 Red Hat Inc.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# * Neither the name of Red Hat nor the names of its contributors may be
+# used to endorse or promote products derived from this software without
+# specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+"""See test-python.py."""
+
+import nbdkit
+import sys
+import pickle
+import base64
+
+API_VERSION = 2
+
+cfg = {}
+
+def config (k, v):
+ global cfg
+ if k == "cfg":
+ cfg = pickle.loads (base64.b64decode (v.encode()))
+
+def config_complete ():
+ print ("set_error = %r" % nbdkit.set_error)
+
+def open (readonly):
+ return {
+ 'disk': bytearray (cfg.get ('size', 0))
+ }
+
+def get_size (h):
+ return len (h['disk'])
+
+def is_rotational (h):
+ return cfg.get ('is_rotational', False)
+
+def can_multi_conn (h):
+ return cfg.get ('can_multi_conn', False)
+
+def can_write (h):
+ return cfg.get ('can_write', True)
+
+def can_flush (h):
+ return cfg.get ('can_flush', False)
+
+def can_trim (h):
+ return cfg.get ('can_trim', False)
+
+def can_zero (h):
+ return cfg.get ('can_zero', False)
+
+def can_fast_zero (h):
+ return cfg.get ('can_fast_zero', False)
+
+def can_fua (h):
+ fua = cfg.get ('can_fua', "none")
+ if fua == "none":
+ return nbdkit.FUA_NONE
+ elif fua == "emulate":
+ return nbdkit.FUA_EMULATE
+ elif fua == "native":
+ return nbdkit.FUA_NATIVE
+
+def can_cache (h):
+ cache = cfg.get ('can_cache', "none")
+ if cache == "none":
+ return nbdkit.CACHE_NONE
+ elif cache == "emulate":
+ return nbdkit.CACHE_EMULATE
+ elif cache == "native":
+ return nbdkit.CACHE_NATIVE
+
+def pread (h, count, offset, flags):
+ assert flags == 0
+ pread_result = cfg.get ('pread_result', "bytearray")
+ b = h['disk'][offset:offset+count]
+ if pread_result == "bytearray":
+ return b
+ elif pread_result == "bytes":
+ return bytes (b)
+ elif pread_result == "memoryview":
+ return memoryview (b)
+
+def pwrite (h, buf, offset, flags):
+ expect_fua = cfg.get ('pwrite_expect_fua', False)
+ actual_fua = bool (flags & nbdkit.FLAG_FUA)
+ assert expect_fua == actual_fua
+ end = offset + len(buf)
+ h['disk'][offset:end] = buf
+
+def flush (h, flags):
+ assert flags == 0
+
+def trim (h, count, offset, flags):
+ expect_fua = cfg.get ('trim_expect_fua', False)
+ actual_fua = bool (flags & nbdkit.FLAG_FUA)
+ assert expect_fua == actual_fua
+ h['disk'][offset:offset+count] = bytearray(count)
+
+def zero (h, count, offset, flags):
+ expect_fua = cfg.get ('zero_expect_fua', False)
+ actual_fua = bool (flags & nbdkit.FLAG_FUA)
+ assert expect_fua == actual_fua
+ expect_may_trim = cfg.get ('zero_expect_may_trim', False)
+ actual_may_trim = bool (flags & nbdkit.FLAG_MAY_TRIM)
+ assert expect_may_trim == actual_may_trim
+ expect_fast_zero = cfg.get ('zero_expect_fast_zero', False)
+ actual_fast_zero = bool (flags & nbdkit.FLAG_FAST_ZERO)
+ assert expect_fast_zero == actual_fast_zero
+ h['disk'][offset:offset+count] = bytearray(count)
+
+def cache (h, count, offset, flags):
+ assert flags == 0
+ # do nothing
diff --git a/tests/test-python.sh b/tests/test-python.sh
new file mode 100755
index 0000000..50324d0
--- /dev/null
+++ b/tests/test-python.sh
@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+# nbdkit
+# Copyright (C) 2019 Red Hat Inc.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# * Neither the name of Red Hat nor the names of its contributors may be
+# used to endorse or promote products derived from this software without
+# specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+source ./functions.sh
+set -e
+set -x
+
+requires $PYTHON --version
+requires $PYTHON -c 'import unittest'
+requires $PYTHON -c 'import nbd'
+requires test -f test_python.py
+requires test -f test-python-plugin.py
+
+# Python has proven very difficult to valgrind, therefore it is disabled.
+if [ "$NBDKIT_VALGRIND" = "1" ]; then
+ echo "$0: skipping Python test under valgrind."
+ exit 77
+fi
+
+$PYTHON -m unittest test_python
diff --git a/tests/test.py b/tests/test.py
deleted file mode 100644
index ac80d96..0000000
--- a/tests/test.py
+++ /dev/null
@@ -1,60 +0,0 @@
-import nbdkit
-
-disk = bytearray(1024*1024)
-
-
-def api_version():
- return 2
-
-
-def config_complete():
- print ("set_error = %r" % nbdkit.set_error)
-
-
-def open(readonly):
- return 1
-
-
-def get_size(h):
- global disk
- return len(disk)
-
-
-def can_write(h):
- return True
-
-
-def can_flush(h):
- return True
-
-
-def is_rotational(h):
- return False
-
-
-def can_trim(h):
- return True
-
-
-def pread(h, count, offset, flags):
- global disk
- return disk[offset:offset+count]
-
-
-def pwrite(h, buf, offset, flags):
- global disk
- end = offset + len(buf)
- disk[offset:end] = buf
-
-
-def flush(h, flags):
- pass
-
-
-def trim(h, count, offset, flags):
- pass
-
-
-def zero(h, count, offset, flags):
- global disk
- disk[offset:offset+count] = bytearray(count)
diff --git a/tests/test_python.py b/tests/test_python.py
new file mode 100755
index 0000000..b2c60f0
--- /dev/null
+++ b/tests/test_python.py
@@ -0,0 +1,236 @@
+#!/usr/bin/env python3
+# nbdkit
+# Copyright (C) 2019 Red Hat Inc.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# * Neither the name of Red Hat nor the names of its contributors may be
+# used to endorse or promote products derived from this software without
+# specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+"""
+This tests the Python plugin thoroughly by issuing client commands
+through libnbd and checking we get the expected results. It uses an
+associated plugin (test-python-plugin.sh).
+"""
+
+import os
+import sys
+import nbd
+import unittest
+import pickle
+import base64
+
+class Test (unittest.TestCase):
+ def setUp (self):
+ self.h = nbd.NBD ()
+
+ def tearDown (self):
+ del self.h
+
+ def connect (self, cfg):
+ cfg = base64.b64encode (pickle.dumps (cfg)).decode()
+ cmd = ["nbdkit", "-v", "-s", "--exit-with-parent",
+ "python", "test-python-plugin.py", "cfg=" + cfg]
+ self.h.connect_command (cmd)
+
+ def test_none (self):
+ """
+ Test we can send an empty pickled test configuration and do
+ nothing else. This is just to ensure the machinery of the
+ test works.
+ """
+ self.connect ({})
+
+ def test_size_512 (self):
+ """Test the size."""
+ self.connect ({"size": 512})
+ assert self.h.get_size() == 512
+
+ def test_size_1m (self):
+ """Test the size."""
+ self.connect ({"size": 1024*1024})
+ assert self.h.get_size() == 1024*1024
+
+ # Test each flag call.
+ def test_is_rotational_true (self):
+ self.connect ({"size": 512, "is_rotational": True})
+ assert self.h.is_rotational()
+
+ def test_is_rotational_false (self):
+ self.connect ({"size": 512, "is_rotational": False})
+ assert not self.h.is_rotational()
+
+ def test_can_multi_conn_true (self):
+ self.connect ({"size": 512, "can_multi_conn": True})
+ assert self.h.can_multi_conn()
+
+ def test_can_multi_conn_false (self):
+ self.connect ({"size": 512, "can_multi_conn": False})
+ assert not self.h.can_multi_conn()
+
+ def test_read_write (self):
+ self.connect ({"size": 512, "can_write": True})
+ assert not self.h.is_read_only()
+
+ def test_read_only (self):
+ self.connect ({"size": 512, "can_write": False})
+ assert self.h.is_read_only()
+
+ def test_can_flush_true (self):
+ self.connect ({"size": 512, "can_flush": True})
+ assert self.h.can_flush()
+
+ def test_can_flush_false (self):
+ self.connect ({"size": 512, "can_flush": False})
+ assert not self.h.can_flush()
+
+ def test_can_trim_true (self):
+ self.connect ({"size": 512, "can_trim": True})
+ assert self.h.can_trim()
+
+ def test_can_trim_false (self):
+ self.connect ({"size": 512, "can_trim": False})
+ assert not self.h.can_trim()
+
+ # nbdkit can always zero because it emulates it.
+ #self.connect ({"size": 512, "can_zero": True})
+ #assert self.h.can_zero()
+ #self.connect ({"size": 512, "can_zero": False})
+ #assert not self.h.can_zero()
+
+ def test_can_fast_zero_true (self):
+ self.connect ({"size": 512, "can_fast_zero": True})
+ assert self.h.can_fast_zero()
+
+ def test_can_fast_zero_false (self):
+ self.connect ({"size": 512, "can_fast_zero": False})
+ assert not self.h.can_fast_zero()
+
+ def test_can_fua_none (self):
+ self.connect ({"size": 512, "can_fua": "none"})
+ assert not self.h.can_fua()
+
+ def test_can_fua_emulate (self):
+ self.connect ({"size": 512, "can_fua": "emulate"})
+ assert self.h.can_fua()
+
+ def test_can_fua_native (self):
+ self.connect ({"size": 512, "can_fua": "native"})
+ assert self.h.can_fua()
+
+ def test_can_cache_none (self):
+ self.connect ({"size": 512, "can_cache": "none"})
+ assert not self.h.can_cache()
+
+ def test_can_cache_emulate (self):
+ self.connect ({"size": 512, "can_cache": "emulate"})
+ assert self.h.can_cache()
+
+ def test_can_cache_native (self):
+ self.connect ({"size": 512, "can_cache": "native"})
+ assert self.h.can_cache()
+
+ # Not yet implemented: can_extents.
+
+ def test_pread_bytearray (self):
+ """Test pread returning bytearray."""
+ self.connect ({"size": 512})
+ buf = self.h.pread (512, 0)
+ assert buf == bytearray (512)
+
+ def test_pread_bytes (self):
+ """Test pread returning bytes."""
+ self.connect ({"size": 512,
+ "pread_result": "bytes"})
+ buf = self.h.pread (512, 0)
+ assert buf == bytearray (512)
+
+ def test_pread_memoryview (self):
+ """Test pread returning memoryview."""
+ self.connect ({"size": 512,
+ "pread_result": "memoryview"})
+ buf = self.h.pread (512, 0)
+ assert buf == bytearray (512)
+
+ # Test pwrite + flags.
+ def test_pwrite (self):
+ self.connect ({"size": 512})
+ buf = bytearray (512)
+ self.h.pwrite (buf, 0)
+
+ def test_pwrite_fua (self):
+ self.connect ({"size": 512,
+ "can_fua": "native",
+ "pwrite_expect_fua": True})
+ buf = bytearray (512)
+ self.h.pwrite (buf, 0, nbd.CMD_FLAG_FUA)
+
+ def test_flush (self):
+ """Test flush."""
+ self.connect ({"size": 512, "can_flush": True})
+ self.h.flush ()
+
+ # Test trim + flags.
+ def test_trim (self):
+ self.connect ({"size": 512, "can_trim": True})
+ self.h.trim (512, 0)
+
+ def test_trim_fua (self):
+ self.connect ({"size": 512,
+ "can_trim": True,
+ "can_fua": "native",
+ "trim_expect_fua": True})
+ self.h.trim (512, 0, nbd.CMD_FLAG_FUA)
+
+ # Test zero + flags.
+ def test_zero (self):
+ self.connect ({"size": 512, "can_zero": True})
+ self.h.zero (512, 0, nbd.CMD_FLAG_NO_HOLE)
+
+ def test_zero_fua (self):
+ self.connect ({"size": 512,
+ "can_zero": True,
+ "can_fua": "native",
+ "zero_expect_fua": True})
+ self.h.zero (512, 0, nbd.CMD_FLAG_NO_HOLE | nbd.CMD_FLAG_FUA)
+
+ def test_zero_may_trim (self):
+ self.connect ({"size": 512,
+ "can_zero": True,
+ "zero_expect_may_trim": True})
+ self.h.zero (512, 0, 0) # absence of nbd.CMD_FLAG_NO_HOLE
+
+ def test_zero_fast_zero (self):
+ self.connect ({"size": 512,
+ "can_zero": True,
+ "can_fast_zero": True,
+ "zero_expect_fast_zero": True})
+ self.h.zero (512, 0, nbd.CMD_FLAG_NO_HOLE | nbd.CMD_FLAG_FAST_ZERO)
+
+ def test_cache (self):
+ """Test cache."""
+ self.connect ({"size": 512, "can_cache": "native"})
+ self.h.cache (512, 0)
--
2.23.0
More information about the Libguestfs
mailing list