#!/bin/bash
#
# Copyright (C) 2019 EfficiOS Inc.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License, version 2 only, 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.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

SH_TAP=1

if [ "x${BT_TESTS_SRCDIR:-}" != "x" ]; then
	UTILSSH="$BT_TESTS_SRCDIR/utils/utils.sh"
else
	UTILSSH="$(dirname "$0")/../utils/utils.sh"
fi

# shellcheck source=../utils/utils.sh
source "$UTILSSH"

plan_tests 21

stdout=$(mktemp test_help_stdout.XXXXXX)
stderr=$(mktemp test_help_stderr.XXXXXX)

# Return 0 if file "$1" exists and is empty, non-0 otherwise.

is_empty()
{
	[[ -f "$1" && ! -s "$1" ]]
}

# Test with a working plugin name.
bt_cli "${stdout}" "${stderr}" help ctf
ok $? "help ctf plugin exit status"

grep --silent 'Description: CTF input and output' "${stdout}"
ok $? "help ctf plugin expected output"

is_empty "${stderr}"
ok $? "help ctf plugin produces no error"

# Test with a working component class name.
bt_cli "${stdout}" "${stderr}" help src.ctf.fs
ok $? "help src.ctf.fs component class exit status"

grep --silent 'Description: Read CTF traces from the file system.' "${stdout}"
ok $? "help src.ctf.fs component class expected output"

is_empty "${stderr}"
ok $? "help src.ctf.fs component class produces no error"

# Test without parameter.
bt_cli "${stdout}" "${stderr}" help
isnt $? 0 "help without parameter exit status"

grep --silent "Missing plugin name or component class descriptor." "${stderr}"
ok $? "help without parameter produces expected error"

is_empty "${stdout}"
ok $? "help without parameter produces no output"

# Test with too many parameters.
bt_cli "${stdout}" "${stderr}" help ctf fs
isnt $? 0  "help with too many parameters exit status"

grep --silent "Extraneous command-line argument specified to \`help\` command:" "${stderr}"
ok $? "help with too many parameters produces expected error"

is_empty "${stdout}"
ok $? "help with too many parameters produces no output"

# Test with unknown plugin name.
bt_cli "${stdout}" "${stderr}" help zigotos
isnt $? 0 "help with unknown plugin name"

grep --silent 'Cannot find plugin: plugin-name="zigotos"' "${stderr}"
ok $? "help with unknown plugin name produces expected error"

is_empty "${stdout}"
ok $? "help with unknown plugin name produces no output"

# Test with unknown component class name (but known plugin).
bt_cli "${stdout}" "${stderr}" help src.ctf.bob
isnt $? 0 "help with unknown component class name"

grep --silent 'Cannot find component class: plugin-name="ctf", comp-cls-name="bob", comp-cls-type=0' "${stderr}"
ok $? "help with unknown component class name produces expected error"

grep --silent 'Description: CTF input and output' "${stdout}"
ok $? "help with unknown component class name prints plugin help"

# Test with unknown component class plugin
bt_cli "${stdout}" "${stderr}" help src.bob.fs
isnt $? 0 "help with unknown component class plugin"

grep --silent 'Cannot find plugin: plugin-name="bob"' "${stderr}"
ok $? "help with unknown component class plugin produces expected error"

is_empty "${stdout}"
ok $? "help with unknown component class plugin produces no output"