#!/bin/sh
# tests/test_sdiff.sh - Tests for sdiff applet
_test_name="sdiff"
. "$(dirname "$0")/harness.sh"
_srcdir="$(cd "$(dirname "$0")/../src/sdiff/tests" && pwd)"

setup_tmpdir
SDIFF="$VX sdiff"

echo "Running sdiff tests..."

# --- flags: -l, -s, -w ---
_got="$($SDIFF -l "$_srcdir/d_input1" "$_srcdir/d_input2" 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_flags_l.out")"
check_eq "$_got" "$_exp" "flags: -l output matches"

_got="$($SDIFF -s "$_srcdir/d_input1" "$_srcdir/d_input2" 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_flags_s.out")"
check_eq "$_got" "$_exp" "flags: -s output matches"

_got="$($SDIFF -w 125 "$_srcdir/d_input1" "$_srcdir/d_input2" 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_flags_w.out")"
check_eq "$_got" "$_exp" "flags: -w output matches"

# --- same file ---
_got="$($SDIFF "$_srcdir/d_input1" "$_srcdir/d_input1" 2>/dev/null)"
_exp="$(cat "$_srcdir/d_same.out")"
check_eq "$_got" "$_exp" "same: identical file output matches"

# --- tabs ---
_got="$($SDIFF "$_srcdir/d_tabs1.in" "$_srcdir/d_tabs2.in" 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_tabs.out")"
check_eq "$_got" "$_exp" "tabs: tab output matches"

# --- tabends ---
_got="$($SDIFF -w30 "$_srcdir/d_tabends.in" /dev/null 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_tabends_a.out")"
check_eq "$_got" "$_exp" "tabends: file vs null (a)"

_got="$($SDIFF -w30 /dev/null "$_srcdir/d_tabends.in" 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_tabends_b.out")"
check_eq "$_got" "$_exp" "tabends: null vs file (b)"

_got="$($SDIFF -w19 "$_srcdir/d_tabends.in" /dev/null 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_tabends_c.out")"
check_eq "$_got" "$_exp" "tabends: narrow width (c)"

# --- oneline ---
_got="$($SDIFF /dev/null "$_srcdir/d_oneline.in" 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_oneline_a.out")"
check_eq "$_got" "$_exp" "oneline: null vs file"

_got="$($SDIFF "$_srcdir/d_oneline.in" /dev/null 2>/dev/null)" || true
_exp="$(cat "$_srcdir/d_oneline_b.out")"
check_eq "$_got" "$_exp" "oneline: file vs null"

# --- basic side-by-side ---
printf "A\nB\nC\n" > sby_a
printf "D\nB\nE\n" > sby_b
$SDIFF sby_a sby_b > sby_out 2>&1 || true
check_grep "|" sby_out "side-by-side: contains change marker"
check_grep "B" sby_out "side-by-side: contains common line"

# --- exit codes ---
printf "a\n" > ex_a
printf "b\n" > ex_b
cp ex_a ex_a2
check_exit "exit: identical files exit 0" 0 $SDIFF ex_a ex_a2
check_exit "exit: different files exit 1" 1 $SDIFF ex_a ex_b

summary