Add 'corebinutils/echo/' from commit '74324d021b4424d2b9b21a8593f4c7680837a275'

git-subtree-dir: corebinutils/echo
git-subtree-mainline: 46f7aa5f7802807c850fcfdd3ec1e2072f7e9d94
git-subtree-split: 74324d021b4424d2b9b21a8593f4c7680837a275

1 files changed, 124 insertions, 0 deletions

diff --git a/corebinutils/echo/tests/test.sh b/corebinutils/echo/tests/test.sh
new file mode 100644
index 0000000000..edd12e877b
--- /dev/null
+++ b/corebinutils/echo/tests/test.sh
@@ -0,0 +1,124 @@
+#!/bin/sh
+#
+# Copyright (c) 2026
+#  Project Tick. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+set -eu
+
+LC_ALL=C
+LANG=C
+export LC_ALL LANG
+
+ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
+ECHO_BIN=${ECHO_BIN:-"$ROOT/out/echo"}
+TMPDIR=${TMPDIR:-/tmp}
+WORKDIR=$(mktemp -d "$TMPDIR/echo-test.XXXXXX")
+trap 'rm -rf "$WORKDIR"' EXIT INT TERM
+
+fail() {
+	printf '%s\n' "FAIL: $1" >&2
+	exit 1
+}
+
+assert_status() {
+	name=$1
+	expected=$2
+	actual=$3
+
+	[ "$expected" -eq "$actual" ] || fail "$name: expected exit $expected got $actual"
+}
+
+assert_file_eq() {
+	name=$1
+	expected_text=$2
+	actual_file=$3
+	expected_file=$WORKDIR/expected.$$
+
+	printf '%s' "$expected_text" > "$expected_file"
+	if ! cmp -s "$expected_file" "$actual_file"; then
+		printf '%s\n' "FAIL: $name" >&2
+		printf '%s\n' "--- expected ---" >&2
+		od -An -tx1 -v "$expected_file" >&2
+		printf '%s\n' "--- actual ---" >&2
+		od -An -tx1 -v "$actual_file" >&2
+		exit 1
+	fi
+}
+
+run_case() {
+	name=$1
+	expected_status=$2
+	expected_stdout=$3
+	expected_stderr=$4
+	shift 4
+
+	stdout_file=$WORKDIR/stdout
+	stderr_file=$WORKDIR/stderr
+
+	if "$ECHO_BIN" "$@" >"$stdout_file" 2>"$stderr_file"; then
+		status=0
+	else
+		status=$?
+	fi
+
+	assert_status "$name status" "$expected_status" "$status"
+	assert_file_eq "$name stdout" "$expected_stdout" "$stdout_file"
+	assert_file_eq "$name stderr" "$expected_stderr" "$stderr_file"
+}
+
+[ -x "$ECHO_BIN" ] || fail "missing binary: $ECHO_BIN"
+
+run_case "no arguments" 0 "
+" ""
+run_case "basic output" 0 "hello world
+" "" "hello" "world"
+run_case "bare -n suppresses newline" 0 "" "" "-n"
+run_case "single leading -n" 0 "hello world" "" "-n" "hello" "world"
+run_case "second -n is literal" 0 "-n literal" "" "-n" "-n" "literal"
+run_case "double hyphen stays literal" 0 "--
+" "" "--"
+run_case "gnu-style -e stays literal" 0 "-e \t
+" "" "-e" "\\t"
+run_case "non-final backslash-c stays literal" 0 "left\\c right
+" "" "left\\c" "right"
+run_case "final backslash-c suppresses newline" 0 "hello" "" "hello\\c"
+run_case "empty final backslash-c suppresses newline" 0 "" "" "\\c"
+
+stdout_file=$WORKDIR/write-fail.stdout
+stderr_file=$WORKDIR/write-fail.stderr
+if (
+	exec 1>&-
+	"$ECHO_BIN" "write-test"
+) >"$stdout_file" 2>"$stderr_file"; then
+	status=0
+else
+	status=$?
+fi
+
+assert_status "write failure status" 1 "$status"
+assert_file_eq "write failure stdout" "" "$stdout_file"
+assert_file_eq "write failure stderr" "echo: write: Bad file descriptor
+" "$stderr_file"
+
+printf '%s\n' "PASS"