[PATCH kvm-unit-tests] runtime.bash: skip test when checked file doesn't exist

[Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>]

Currently, we have the following check condition in x86/unittests.cfg:

check = /sys/module/kvm_intel/parameters/allow_smaller_maxphyaddr=Y

the check, however, passes successfully on AMD because the checked file
is just missing. This doesn't sound right, reverse the check: fail
if the content of the file doesn't match the expectation or if the
file is not there.

Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
 scripts/runtime.bash | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/runtime.bash b/scripts/runtime.bash
index 3121c1ffdae8..f94c094de03b 100644
--- a/scripts/runtime.bash
+++ b/scripts/runtime.bash
@@ -118,7 +118,10 @@ function run()
     for check_param in "${check[@]}"; do
         path=${check_param%%=*}
         value=${check_param#*=}
-        if [ -f "$path" ] && [ "$(cat $path)" != "$value" ]; then
+	if [ -z "$path" ]; then
+            continue
+	fi
+        if [ ! -f "$path" ] || [ "$(cat $path)" != "$value" ]; then
             print_result "SKIP" $testname "" "$path not equal to $value"
             return 2
         fi
-- 
2.25.4