[msitools: 3/4] tests: fix null byte warning

[Marc-André Lureau <malureau src gnome org>]

commit 7ddd0e826d94f6f18db16937d4da037b5b48095c
Author: Marc-André Lureau <marcandre lureau redhat com>
Date:   Mon Jan 11 16:11:59 2021 +0400

    tests: fix null byte warning
    
    gitlab CI get a new warning that make the test failing:
    warning: command substitution: ignored null byte in input
    
    Signed-off-by: Marc-André Lureau <marcandre lureau redhat com>

 tests/tools.bats | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tests/tools.bats b/tests/tools.bats
index 1d50c1c..d16f6c6 100644
--- a/tests/tools.bats
+++ b/tests/tools.bats
@@ -124,8 +124,8 @@ Binary" ]
   run "$msiinfo" streams out.msi
   out=$(echo "$output" | grep -v SummaryInformation)
   [ "$out" = "Icon.firefox.16.0.2.0.ico.exe" ]
-  run "$msiinfo" extract out.msi Icon.firefox.16.0.2.0.ico.exe
-  exp=$(cat Icon/firefox.16.0.2.0.ico.exe)
+  output=$("$msiinfo" extract out.msi Icon.firefox.16.0.2.0.ico.exe | sha1sum)
+  exp=$(cat Icon/firefox.16.0.2.0.ico.exe | sha1sum)
   [ "$output" = "$exp" ]
 }