test: document when writable /usr overlays may be needed

diff --git a/test/units/testsuite-15.sh b/test/units/testsuite-15.sh
index 0266f6266fb43ce007801925cce7ac371be26fcc..204fa992199cc3769aaa5ddc58aa0d0bf5f783a5 100755 (executable)
--- a/test/units/testsuite-15.sh
+++ b/test/units/testsuite-15.sh
@@ -8,6 +8,7 @@ set -o pipefail
 # shellcheck source=test/units/util.sh
 . "$(dirname "$0")"/util.sh
 
+# Needed to write units to /usr/lib/systemd/system to test /etc and /run overrides.
 maybe_mount_usr_overlay
 trap 'maybe_umount_usr_overlay' EXIT
 

diff --git a/test/units/testsuite-26.sh b/test/units/testsuite-26.sh
index 2dd62a4f67412a423e60abcf905088ee0bc542df..6734aee654fc0e228778db46e45b0260f6d63dda 100755 (executable)
--- a/test/units/testsuite-26.sh
+++ b/test/units/testsuite-26.sh
@@ -18,6 +18,7 @@ at_exit() {
     return 0
 }
 
+# Needed for /usr/lib/systemd/system/$UNIT_NAME to test overrides in /etc and /run
 maybe_mount_usr_overlay
 trap at_exit EXIT
 

diff --git a/test/units/testsuite-60.sh b/test/units/testsuite-60.sh
index 3d0723e7dcc096776c75ccedac72708d4ab37ee7..c777de8526301bacd7e7600b02e495f3708421ed 100755 (executable)
--- a/test/units/testsuite-60.sh
+++ b/test/units/testsuite-60.sh
@@ -6,6 +6,7 @@ set -o pipefail
 # shellcheck source=test/units/util.sh
 . "$(dirname "$0")"/util.sh
 
+# Needed to create mount.mytmpfs helper
 maybe_mount_usr_overlay
 trap 'maybe_umount_usr_overlay' EXIT
 

diff --git a/test/units/testsuite-73.sh b/test/units/testsuite-73.sh
index 3e5b78879ad46894e75b0f750e96e1e6d0abcc1f..59f84f20abcd75c06d153a2ae24d55c0c387ee1f 100755 (executable)
--- a/test/units/testsuite-73.sh
+++ b/test/units/testsuite-73.sh
@@ -9,6 +9,7 @@ set -o pipefail
 # shellcheck source=test/units/util.sh
 . "$(dirname "$0")"/util.sh
 
+# Needed to generate test locales in /usr/lib
 maybe_mount_usr_overlay
 trap 'maybe_umount_usr_overlay' EXIT