From 26683ff6b8e0f671f5af3687f836b65cca98efd2 Mon Sep 17 00:00:00 2001
From: Per Cederqvist <ceder@lysator.liu.se>
Date: Sat, 12 Mar 2005 22:43:17 +0000
Subject: [PATCH] (Timeout): New exception. (handler): New signal handler.
(TestCase): New class. (TestCase.setUp): New setup function. Reset the state
of pcl_expect, and set up a SIGALRM timer. (TestCase.tearDown):
Cancel the SIGALRM timer. (TestCase.progress): Re-arm the SIGALRM timer.
(TestCase.assertTimeDiff): New function.
---
test/base.py | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 test/base.py
diff --git a/test/base.py b/test/base.py
new file mode 100644
index 0000000..cd8dc1a
--- /dev/null
+++ b/test/base.py
@@ -0,0 +1,46 @@
+import signal
+import unittest
+
+import pcl_expect
+
+class Timeout(Exception): pass
+
+def handler(signo, stk):
+ raise Timeout()
+
+class TestCase(unittest.TestCase):
+ """Base class for most pcl-expect test suites.
+ """
+ def setUp(self):
+ """Reset state in pcl_expect, and arm the timeout."""
+ pcl_expect.reset_state()
+ signal.signal(signal.SIGALRM, handler)
+ self.progress()
+
+ def tearDown(self):
+ """Cancel the timeout."""
+ signal.alarm(0)
+
+ def progress(self):
+ """Re-arm the timeout.
+
+ Test cases that are expected to take a long time to run may
+ use this method -- but only if they are absolutely certain
+ that they cannot be running in an endless loop.
+ """
+
+ signal.alarm(20)
+
+ def assertTimeDiff(self, t0, t1, expected):
+ """Report an error unless two times differ the expected amount.
+
+ Compute t1-t0, and compare it to expected. If they the
+ expected differance is more than 0.2 seconds off, raise an
+ error.
+ """
+
+ diff = t1-t0
+ err = abs(diff-expected)
+ if err > 0.2:
+ self.fail('wrong time difference %g, expected %g' % (
+ diff, expected))
--
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