#!/bin/bash
set -eu
set -o pipefail

: ${BIN:=..}
: ${EMU:=qemu-riscv64}

cmd=$BIN/echo
name=echo

fail=0
err() {
    echo "FAIL $name: $*"
    fail=1
}

# the shell strips the trailing newline when capturing output,
# which makes writing tests for echo a bit difficult

out=$($EMU $cmd)
len=$($EMU $cmd | wc -c)
stat=$?
if [ "$out" != "" ]; then
    err "expected a newline"
fi
if [ "$len" -ne 1 ]; then
    err "expected len 1, got len $len"
fi
if [ "$stat" -ne 0 ]; then
    err "exited with status code $stat, expected 0"
fi


out=$($EMU $cmd a b c)
stat=$?
if [ "$out" != "a b c" ]; then
    err "expected 'a b c', got '$out'"
fi
if [ "$stat" -ne 0 ]; then
    err "exited with status code $stat, expected 0"
fi


out=$($EMU $cmd 'a    b')
stat=$?
if [ "$out" != "a    b" ]; then
    err "expected 'a    b', got '$out'"
fi
if [ "$stat" -ne 0 ]; then
    err "exited with status code $stat, expected 0"
fi


if [ "$fail" -eq 0 ]; then
    echo PASS $name
fi