[PATCH v2 1/3] Start python based tests

[Nir Soffer]

From: Nir Soffer <nsoffer(a)redhat.com&gt;

Add README.dev with instructions on how to run the tests, and add couple
of basic tests for "sanlock direct ...". Testing the direct commands is
easy. More infrastructure is needed to test the daemon.

Signed-off-by: Nir Soffer <nsoffer(a)redhat.com&gt;
---
 .gitignore           |  1 +
 README.dev           | 20 ++++++++++++++++++++
 tests/direct_test.py | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 54 insertions(+)
 create mode 100644 README.dev
 create mode 100644 tests/direct_test.py

diff --git a/.gitignore b/.gitignore
index 05f923a..d46effb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ tests/killpath
 tests/sanlk_client
 tests/sanlk_load
 tests/sanlk_path
+tests/__pycache__/
diff --git a/README.dev b/README.dev
new file mode 100644
index 0000000..52bc828
--- /dev/null
+++ b/README.dev
@@ -0,0 +1,20 @@
+How to test sanlock
+===================
+
+To run the python based tests, you need pytest. The best way to install a
+recent version is to use pip:
+
+    $ pip install pytest
+
+Before running the tests, you need to build sanlock and wdmd:
+
+    $ make -C wdmd
+    $ make -C src
+
+To use libsanlock.so and libwdmd.so from the source tree:
+
+    $ export LD_LIBRARY_PATH=$PWD/src:$PWD/wdmd
+
+To run the tests:
+
+    $ pytest
diff --git a/tests/direct_test.py b/tests/direct_test.py
new file mode 100644
index 0000000..b9966f3
--- /dev/null
+++ b/tests/direct_test.py
@@ -0,0 +1,33 @@
+"""
+Test sanlock direct options.
+"""
+
+import io
+import struct
+import subprocess
+
+SANLOCK = "src/sanlock"
+
+
+def test_init_lockspace(tmpdir):
+    path = tmpdir.join("lockspace")
+    with io.open(str(path), "wb") as f:
+        # Poison with junk data.
+        f.write(b"x" * 1024**2 + b"X" * 512)
+
+    lockspace = "name:1:%s:0" % path
+    run(SANLOCK, "direct", "init", "-s", lockspace)
+
+    with io.open(str(path), "rb") as f:
+        magic, = struct.unpack("< I", f.read(4))
+        assert magic == 0x12212010
+
+        # TODO: check more stuff here...
+
+        # Do not modify data after the lockspace area.
+        f.seek(1024**2, io.SEEK_SET)
+        assert f.read(512) == b"X" * 512
+
+
+def run(*args):
+    return subprocess.check_output(args)
-- 
2.9.5