From 8e82688e9cab3efbde05f1671b1e9f634f6f2300 Mon Sep 17 00:00:00 2001
From: Andreas Beckmann <anbe@debian.org>
Date: Fri, 19 Nov 2021 12:10:45 +0100
Subject: [PATCH] [PATCH 58/90] run_test: show diff if test output does not
 match the expected output

Gbp-Pq: Name 0058-run_test-show-diff-if-test-output-does-not-match-the.patch
---
 cmake/run_test.cmake | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/cmake/run_test.cmake b/cmake/run_test.cmake
index 5ea265b..41f13bf 100644
--- a/cmake/run_test.cmake
+++ b/cmake/run_test.cmake
@@ -62,6 +62,16 @@ if(output_blessed)
     )
 
   if( test_not_successful )
+    find_program(DIFF "diff")
+    if(DIFF)
+      execute_process(
+        COMMAND "${DIFF}" "-d" "-u" "${output_blessed}" "${RANDOM_FILE}"
+        RESULT_VARIABLE test_not_successful
+        OUTPUT_VARIABLE stdout
+        ERROR_VARIABLE stderr
+        )
+      message("${stdout}\n${stderr}")
+    endif()
     message(SEND_ERROR "FAIL: Test output does not match the expected output; output stored in ${RANDOM_FILE}" )
   else()
     file(REMOVE "${RANDOM_FILE}")
-- 
2.30.2