Tests: Factor out RunCMake ctest environment isolation

Some RunCMake tests unset some environment variables that affect ctest's
behavior before running it.  Any test using the RunCTest helper needs to
do this, so do it in the helper itself.

Issue: #24153

6 files changed, 4 insertions, 16 deletions

diff --git a/Tests/RunCMake/CTestCommandLine/RunCMakeTest.cmake b/Tests/RunCMake/CTestCommandLine/RunCMakeTest.cmake
index df3e82a..8c35fe5 100644
--- a/Tests/RunCMake/CTestCommandLine/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CTestCommandLine/RunCMakeTest.cmake
@@ -3,9 +3,6 @@ include(RunCTest)
 
 set(RunCMake_TEST_TIMEOUT 60)
 
-unset(ENV{CTEST_PARALLEL_LEVEL})
-unset(ENV{CTEST_OUTPUT_ON_FAILURE})
-
 run_cmake_command(repeat-opt-bad1
   ${CMAKE_CTEST_COMMAND} --repeat until-pass
   )
diff --git a/Tests/RunCMake/RunCTest.cmake b/Tests/RunCMake/RunCTest.cmake
index 59db395..86f5b3a 100644
--- a/Tests/RunCMake/RunCTest.cmake
+++ b/Tests/RunCMake/RunCTest.cmake
@@ -1,5 +1,9 @@
 include(RunCMake)
 
+# Isolate our ctest runs from external environment.
+unset(ENV{CTEST_PARALLEL_LEVEL})
+unset(ENV{CTEST_OUTPUT_ON_FAILURE})
+
 function(run_ctest CASE_NAME)
   configure_file(${RunCMake_SOURCE_DIR}/test.cmake.in
                  ${RunCMake_BINARY_DIR}/${CASE_NAME}/test.cmake @ONLY)
diff --git a/Tests/RunCMake/ctest_environment/RunCMakeTest.cmake b/Tests/RunCMake/ctest_environment/RunCMakeTest.cmake
index 365c9e8..4716c41 100644
--- a/Tests/RunCMake/ctest_environment/RunCMakeTest.cmake
+++ b/Tests/RunCMake/ctest_environment/RunCMakeTest.cmake
@@ -1,9 +1,5 @@
 include(RunCTest)
 
-# Isolate our ctest runs from external environment.
-unset(ENV{CTEST_PARALLEL_LEVEL})
-unset(ENV{CTEST_OUTPUT_ON_FAILURE})
-
 set(CASE_SOURCE_DIR "${RunCMake_SOURCE_DIR}")
 set(RunCTest_VERBOSE_FLAG "-VV")
 
diff --git a/Tests/RunCMake/ctest_fixtures/RunCMakeTest.cmake b/Tests/RunCMake/ctest_fixtures/RunCMakeTest.cmake
index 1754203..1c2ad89 100644
--- a/Tests/RunCMake/ctest_fixtures/RunCMakeTest.cmake
+++ b/Tests/RunCMake/ctest_fixtures/RunCMakeTest.cmake
@@ -1,9 +1,5 @@
 include(RunCTest)
 
-# Isolate our ctest runs from external environment.
-unset(ENV{CTEST_PARALLEL_LEVEL})
-unset(ENV{CTEST_OUTPUT_ON_FAILURE})
-
 function(run_ctest_test CASE_NAME)
   set(CASE_CTEST_FIXTURES_ARGS "${ARGN}")
   run_ctest(${CASE_NAME})
diff --git a/Tests/RunCMake/ctest_memcheck/RunCMakeTest.cmake b/Tests/RunCMake/ctest_memcheck/RunCMakeTest.cmake
index cb8f696..3f6501e 100644
--- a/Tests/RunCMake/ctest_memcheck/RunCMakeTest.cmake
+++ b/Tests/RunCMake/ctest_memcheck/RunCMakeTest.cmake
@@ -4,8 +4,6 @@ set(SITE test-site)
 set(BUILDNAME test-build)
 set(COVERAGE_COMMAND "")
 
-unset(ENV{CTEST_PARALLEL_LEVEL})
-
 function(run_mc_test CASE_NAME CHECKER_COMMAND)
   run_ctest(${CASE_NAME} ${ARGN})
 endfunction()
diff --git a/Tests/RunCMake/ctest_test/RunCMakeTest.cmake b/Tests/RunCMake/ctest_test/RunCMakeTest.cmake
index 74ae99c..242a059 100644
--- a/Tests/RunCMake/ctest_test/RunCMakeTest.cmake
+++ b/Tests/RunCMake/ctest_test/RunCMakeTest.cmake
@@ -1,9 +1,6 @@
 include(RunCTest)
 set(RunCMake_TEST_TIMEOUT 60)
 
-unset(ENV{CTEST_PARALLEL_LEVEL})
-unset(ENV{CTEST_OUTPUT_ON_FAILURE})
-
 set(CASE_CTEST_TEST_ARGS "")
 set(CASE_CTEST_TEST_LOAD "")