1 files changed, 77 insertions, 0 deletions
diff --git a/desktop/modules/git/test-gitcfg.sh b/desktop/modules/git/test-gitcfg.sh
new file mode 100755
index 0000000..328a575
--- /dev/null
+++ b/desktop/modules/git/test-gitcfg.sh
@@ -0,0 +1,77 @@
+#!/bin/bash
+#
+# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# The one runnable check for gitcfg. GIT_CONFIG_GLOBAL points git at a file
+# in a temp directory, so the real ~/.gitconfig is never read or written.
+#
+# Usage: ./test-gitcfg.sh   (exit 0 = all passed)
+
+set -u
+
+here="$(cd "$(dirname "$0")" && pwd)"
+ctl="$here/gitcfg"
+tmp="$(mktemp -d)"
+trap 'rm -rf "$tmp"' EXIT
+export GIT_CONFIG_GLOBAL="$tmp/gitconfig"
+
+fail=0
+check() {
+    if [[ "$2" == "$3" ]]; then
+        echo "ok   $1"
+    else
+        echo "FAIL $1"
+        printf '  want: %q\n  got:  %q\n' "$2" "$3"
+        fail=1
+    fi
+}
+vals() { git config --global --get-all "$1" | paste -sd,; }
+
+# Values starting with a dash, as versionsort.prereleasesuffix holds, and a
+# comment that every write must leave alone.
+printf '# keep me\n[v]\n\ts = -rc\n\ts = -beta\n\ts = -alpha\n' > "$GIT_CONFIG_GLOBAL"
+
+check "list" $'v.s\n-rc|v.s\n-beta|v.s\n-alpha|' "$("$ctl" list | tr '\0' '|')"
+
+out="$("$ctl" set v.s -beta -BETA)"; rc=$?
+check "set one of three: rc" 0 "$rc"
+check "set one of three: silent" "" "$out"
+check "set one of three: values" "-rc,-BETA,-alpha" "$(vals v.s)"
+
+# git would append here and exit 0; gitcfg must refuse instead.
+out="$("$ctl" set v.s -gone x)"; rc=$?
+check "set missing old: rc" 1 "$rc"
+check "set missing old: says so" 1 "$([[ -n "$out" ]] && echo 1)"
+check "set missing old: nothing appended" "-rc,-BETA,-alpha" "$(vals v.s)"
+
+out="$("$ctl" unset v.s -rc)"; rc=$?
+check "unset one of three: rc" 0 "$rc"
+check "unset one of three: values" "-BETA,-alpha" "$(vals v.s)"
+
+out="$("$ctl" unset v.s -gone)"; rc=$?
+check "unset missing: rc" 1 "$rc"
+check "unset missing: says so" 1 "$([[ -n "$out" ]] && echo 1)"
+
+out="$("$ctl" add a.b "x=y")"; rc=$?
+check "add with =: rc" 0 "$rc"
+check "add with =: value" "x=y" "$(vals a.b)"
+
+out="$("$ctl" add "bad key" v)"; rc=$?
+check "add bad key: rc" 1 "$rc"
+check "add bad key: git's error" 1 "$([[ "$out" == *section* ]] && echo 1)"
+
+check "comment kept" 1 "$(grep -c '^# keep me$' "$GIT_CONFIG_GLOBAL")"
+
+"$ctl" bogus >/dev/null 2>&1; rc=$?
+check "usage: rc" 2 "$rc"
+
+exit "$fail"