[PATCH kvm-unit-tests] scripts: Fix the check whether testname is in the only_tests list

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

When you currently run

  ./run_tests.sh ioapic-split

the kvm-unit-tests run scripts do not only execute the "ioapic-split"
test, but also the "ioapic" test, which is quite surprising. This
happens because we use "grep -w" for checking whether a test should
be run or not.  Because "grep -w" does not consider the "-" character as
part of a word, "ioapic" successfully matches against "ioapic-split".

To fix the issue, use spaces as the only delimiter when running "grep",
removing the problematic "-w" flag from the invocation.

Reported-by: Thomas Huth <thuth@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 scripts/runtime.bash | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/scripts/runtime.bash b/scripts/runtime.bash
index 8bfe31c..6158e37 100644
--- a/scripts/runtime.bash
+++ b/scripts/runtime.bash
@@ -68,6 +68,11 @@ function print_result()
     fi
 }
 
+function find_word()
+{
+    grep -q " $1 " <<< " $2 "
+}
+
 function run()
 {
     local testname="$1"
@@ -84,15 +89,15 @@ function run()
         return
     fi
 
-    if [ -n "$only_tests" ] && ! grep -qw "$testname" <<<$only_tests; then
+    if [ -n "$only_tests" ] && ! find_word "$testname" "$only_tests"; then
         return
     fi
 
-    if [ -n "$only_group" ] && ! grep -qw "$only_group" <<<$groups; then
+    if [ -n "$only_group" ] && ! find_word "$only_group" "$groups"; then
         return
     fi
 
-    if [ -z "$only_group" ] && grep -qw "nodefault" <<<$groups &&
+    if [ -z "$only_group" ] && find_word nodefault "$groups" &&
             skip_nodefault; then
         print_result "SKIP" $testname "" "test marked as manual run only"
         return;
-- 
2.25.4