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authorAndrew Yourtchenko <ayourtch@gmail.com>2019-03-28 20:36:56 +0100
committerDamjan Marion <dmarion@me.com>2019-04-02 06:54:43 +0000
commitd1a12ef820608516d6b9f76fe0e4ad8c7a04629c (patch)
treec25cf10827836a6ce6dbc074d5c644e602a7694f /test
parenta4b10e5e86bac8464253beb14c1c57b120b57a09 (diff)
vppinfra: fix sparse_vec_index() returning non-zero index for some nonexistent elements
If we are testing for an index whose membership bitmask happens to sit in LSB of uword, and there is nothing else set in that uword in the member bitmask, the shortcut path returning the valid index is taken even if the element with a given index doesn't exist in the sparse vector. This happens because the count of leading zeroes on the value of 0 is zero, which is equal to the value taken modulo bitsize uword. Take care of that case. Also add unittests showing the problem and verifying that sparse_vec_index2 does not have the same issue. Change-Id: I19117e13817c3e5de579b9250bb741de42491985 Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
Diffstat (limited to 'test')
-rw-r--r--test/test_sparse_vec.py34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/test_sparse_vec.py b/test/test_sparse_vec.py
new file mode 100644
index 00000000000..0cc1a76ed56
--- /dev/null
+++ b/test/test_sparse_vec.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+
+import unittest
+
+from framework import VppTestCase, VppTestRunner
+from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath
+
+
+class TestSparseVec(VppTestCase):
+ """ SparseVec Test Cases """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestSparseVec, cls).setUpClass()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestSparseVec, cls).tearDownClass()
+
+ def setUp(self):
+ super(TestSparseVec, self).setUp()
+
+ def tearDown(self):
+ super(TestSparseVec, self).tearDown()
+
+ def test_string_unittest(self):
+ """ SparseVec unit tests """
+ error = self.vapi.cli("test sparse_vec")
+ if error.find("failed") != -1:
+ self.logger.critical("FAILURE in the sparse_vec test")
+ self.assertNotIn("failed", error)
+
+if __name__ == '__main__':
+ unittest.main(testRunner=VppTestRunner)