Tests: Preemptively fail infinite blocking tests when low on disk space

In the system tests run by LAVA, the infinite blocking tests were
hanging when the system under test ran out of disk space. This is the
expected behaviour of the failing test, but the condition can be
detected and the tests preemptively failed with a clear error of what
needs to be addressed in the system being tested.

Change-Id: I9e6126408b57c2cd5aa64c2e360e0672f9eb2314
Signed-off-by: Kienan Stewart <kstewart@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/tests/regression/ust/blocking/test_blocking b/tests/regression/ust/blocking/test_blocking
index 751b3453b50d7e264e6dd411b96407389931bf1c..0bbc02ddc3c61dec86768c5d14fd27b6353ecc6b 100755 (executable)
--- a/tests/regression/ust/blocking/test_blocking
+++ b/tests/regression/ust/blocking/test_blocking
@@ -30,6 +30,19 @@ function run_app()
        ok $? "Application done"
 }
 
+function check_disk_space()
+{
+       local path
+
+       path="${1:?}"
+       kb_free=$(df -k -P "${path}" | tail -n 1 | awk '{ print $4 }')
+       if [ "${kb_free}" -lt "1048576" ] ; then
+               return 1
+       fi
+
+       return 0
+}
+
 function test_ust_implicit_no_blocking()
 {
        NUM_EVENT=5000000
@@ -136,6 +149,10 @@ print_test_banner "$TEST_DESC"
 
 bail_out_if_no_babeltrace
 
+if ! check_disk_space "${TMPDIR:-/tmp}"; then
+       BAIL_OUT "Not enough free space to run blocking tests"
+fi
+
 TESTS=(
        "test_ust_implicit_no_blocking"
        "test_ust_implicit_no_blocking_with_channel_blocking"