Adjust skip_if_travis to be generic skip_if_ci and work on github osx…

… as well

Apparently that test was "always" skipped, so we will just do the same
on github actions for now

scripts/tests/test_helpers.bash

@@ -62,8 +62,8 @@ pull_singularity_shim () {
 	fi
 }
 
-skip_if_travis_osx() {
-	if [ "$TRAVIS_OS_NAME" = osx ]
+skip_if_ci_osx() {
+	if [ "$TRAVIS_OS_NAME" = osx ] || ( [ -n "GITHUB_ENV" ] && [ "$RUNNER_OS" = "macOS" ] )
 	then
 		skip "$@"
 	fi

scripts/tests/test_singularity_cmd.bats

@@ -46,26 +46,26 @@ git annex get "$arg_test_img"
 
 # bats test_tags=docker
 @test "verifying ability to singularity exec under /tmp subdir" {
-	skip_if_travis_osx "skipping Singularity directory test on Travis OSX"
+	skip_if_ci_osx "skipping Singularity directory test on Travis OSX"
 	check_subdir "$(_mktemp_dir_under /tmp)"
 }
 
 # bats test_tags=docker
 @test "verifying ability to singularity exec under /tmp subdir (explicit use of docker)" {
-	skip_if_travis_osx "skipping Singularity directory test on Travis OSX"
+	skip_if_ci_osx "skipping Singularity directory test on Travis OSX"
 	export REPRONIM_USE_DOCKER=1
 	check_subdir "$(_mktemp_dir_under /tmp)"
 }
 
 # bats test_tags=docker
 @test "verifying ability to singularity exec under $HOME subdir" {
-	skip_if_travis_osx "skipping Singularity directory test on Travis OSX"
+	skip_if_ci_osx "skipping Singularity directory test on Travis OSX"
 	check_subdir "$(_mktemp_dir_under $HOME)"
 }
 
 # bats test_tags=docker
 @test "verifying ability to singularity exec under $HOME subdir (explicit use of docker)" {
-	skip_if_travis_osx "skipping Singularity directory test on Travis OSX"
+	skip_if_ci_osx "skipping Singularity directory test on Travis OSX"
 	export REPRONIM_USE_DOCKER=1
 	check_subdir "$(_mktemp_dir_under $HOME)"
 }