test: introduce TEST-81-GENERATORS

Add some explicit tests for various generators we ship, e.g.:
    - systemd-debug-generator
    - systemd-environment-d-generator
    - systemd-fstab-generator

1 files changed, 80 insertions, 0 deletions

diff --git a/test/units/testsuite-81.environment-d-generator.sh b/test/units/testsuite-81.environment-d-generator.sh
new file mode 100755
index 0000000000..5bc3978951
--- /dev/null
+++ b/test/units/testsuite-81.environment-d-generator.sh
@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# shellcheck disable=SC2235
+set -eux
+set -o pipefail
+
+# shellcheck source=test/units/generator-utils.sh
+. "$(dirname "$0")/generator-utils.sh"
+
+GENERATOR_BIN="/usr/lib/systemd/user-environment-generators/30-systemd-environment-d-generator"
+CONFIG_FILE="/run/environment.d/99-test.conf"
+OUT_FILE="$(mktemp)"
+
+at_exit() {
+    set +e
+    rm -frv "${CONFIG_FILE:?}" "${OUT_FILE:?}"
+    systemctl -M testuser@.host --user daemon-reload
+}
+
+trap at_exit EXIT
+
+test -x "${GENERATOR_BIN:?}"
+mkdir -p /run/environment.d/
+
+cat >"$CONFIG_FILE" <<EOF
+
+\t\n\t
+3
+=
+    =
+INVALID
+ALSO_INVALID=
+EMPTY_INVALID=""
+3_INVALID=foo
+xxxx xx xxxxxx
+# This is a comment
+$(printf "%.0sx" {0..4096})=
+SIMPLE=foo
+REF=\$SIMPLE
+ALSO_REF=\${SIMPLE}
+DEFAULT="\${NONEXISTENT:-default value}"
+ALTERNATE="\${SIMPLE:+alternate value}"
+LIST=foo,bar,baz
+SIMPLE=redefined
+UNASSIGNED=\$FOO_BAR_BAZ
+VERY_LONG="very $(printf "%.0sx" {0..4096})= long string"
+EOF
+
+# Source env assignments from a file and check them - do this in a subshell
+# to not pollute the test environment
+check_environment() {(
+    # shellcheck source=/dev/null
+    source "${1:?}"
+
+    [[ "$SIMPLE" == "redefined" ]]
+    [[ "$REF" == "foo" ]]
+    [[ "$ALSO_REF" == "foo" ]]
+    [[ "$DEFAULT" == "default value" ]]
+    [[ "$ALTERNATE" == "alternate value" ]]
+    [[ "$LIST" == "foo,bar,baz" ]]
+    [[ "$VERY_LONG" =~ ^very\  ]]
+    [[ "$VERY_LONG" =~ \ long\ string$ ]]
+    [[ -z "$UNASSIGNED" ]]
+    [[ ! -v INVALID ]]
+    [[ ! -v ALSO_INVALID ]]
+    [[ ! -v EMPTY_INVALID ]]
+    [[ ! -v 3_INVALID ]]
+)}
+
+# Check the output by directly calling the generator
+"$GENERATOR_BIN" | tee "$OUT_FILE"
+check_environment "$OUT_FILE"
+: >"$OUT_FILE"
+
+# Check if the generator is correctly called in a user session
+systemctl -M testuser@.host --user daemon-reload
+systemctl -M testuser@.host --user show-environment | tee "$OUT_FILE"
+check_environment "$OUT_FILE"
+
+(! "$GENERATOR_BIN" foo)