usr.bin/indent/t_options.sh

#! /bin/sh
# $NetBSD: t_options.sh,v 1.6 2021/10/18 18:10:20 rillig Exp $
#
# Copyright (c) 2021 The NetBSD Foundation, Inc.
# 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
#
# $FreeBSD$

# Tests for indent that focus on comparing the effects of the various command
# line options.
#
# The test files contain the input to be formatted, the formatting options
# and the output, all as close together as possible. The test files use the
# following directives:
#
#	#indent input [description]
#		Specifies the input to be formatted.
#	#indent run [options]
#		Runs indent on the input, using the given options.
#	#indent end [description]
#		Finishes an '#indent input' or '#indent run' section.
#	#indent run-equals-input [options]
#		Runs indent on the input, expecting unmodified output.
#	#indent run-equals-prev-output [options]
#		Runs indent on the input, expecting the same output as from
#		the previous run.
#
# All text outside these directives is not passed to indent.

srcdir=$(atf_get_srcdir)
indent=$(atf_config_get usr.bin.indent.test_indent /usr/bin/indent)

# Read the test specification from stdin, output the actual test output on
# stdout, write the expected test output to 'expected.out'.
#
# shellcheck disable=SC2016
check_awk='
function die(lineno, msg)
{
	if (!died) {
		died = 1
		print FILENAME ":" lineno ": error: " msg > "/dev/stderr"
		exit(1)
	}
}

BEGIN {
	section = ""		# "", "input" or "run"
	section_excl_comm = ""	# without dollar comments
	section_incl_comm = ""	# with dollar comments

	input_excl_comm = ""	# stdin for indent
	input_incl_comm = ""	# used for duplicate checks
	unused_input_lineno = 0

	output_excl_comm = ""	# expected output
	output_incl_comm = ""	# used for duplicate checks
	output_lineno = 0
}

# Hide comments starting with dollar from indent; they are used for marking
# bugs and adding other remarks directly in the input or output sections.
/^[[:space:]]*\/[*][[:space:]]*[$].*[*]\/$/ ||
    /^[[:space:]]*\/\/[[:space:]]*[$]/ {
	if (section != "")
		section_incl_comm = section_incl_comm $0 "\n"
	next
}

function check_unused_input()
{
	if (unused_input_lineno != 0)
		die(unused_input_lineno, "input is not used")
}

function run_indent(inp,   i, cmd)
{
	cmd = ENVIRON["INDENT"]
	for (i = 3; i <= NF; i++)
		cmd = cmd " " $i
	printf("%s", inp) | cmd
	close(cmd)
}

/^#/ && $1 == "#indent" {
	print $0
	print $0 > "expected.out"

	if ($2 == "input") {
		section = "input"
		section_excl_comm = ""
		section_incl_comm = ""
		unused_input_lineno = NR

	} else if ($2 == "run") {
		section = "run"
		output_lineno = NR
		section_excl_comm = ""
		section_incl_comm = ""

		run_indent(input_excl_comm)
		unused_input_lineno = 0

	} else if ($2 == "run-equals-input") {
		run_indent(input_excl_comm)
		printf("%s", input_excl_comm) > "expected.out"
		unused_input_lineno = 0

	} else if ($2 == "run-equals-prev-output") {
		run_indent(input_excl_comm)
		printf("%s", output_excl_comm) > "expected.out"
		unused_input_lineno = 0

	} else if ($2 == "end") {
		if (section == "input" && section_incl_comm == input_incl_comm)
			die(NR, "duplicate input; remove this section")
		if (section == "run" && section_incl_comm == input_incl_comm)
			die(output_lineno,
			    "output == input; use run-equals-input")
		if (section == "run" && section_incl_comm == output_incl_comm)
			die(output_lineno,
			    "duplicate output; use run-equals-prev-output")

		if (section == "input") {
			input_excl_comm = section_excl_comm
			input_incl_comm = section_incl_comm
		}
		if (section == "run") {
			output_excl_comm = section_excl_comm
			output_incl_comm = section_incl_comm
		}
		section = ""

	} else {
		die(NR, "invalid line \"" $0 "\"")
	}

	next
}

section == "input" || section == "run" {
	section_excl_comm = section_excl_comm $0 "\n"
	section_incl_comm = section_incl_comm $0 "\n"
}

section == "run" {
	print $0 > "expected.out"
}

END {
	if (section != "")
		die(NR, "still in section \"" section "\"")
	check_unused_input()
}
'

check()
{
	printf '%s\n' "$check_awk" > check.awk

	atf_check -o "file:expected.out" \
	    env INDENT="$indent" awk -f check.awk "$srcdir/$1.c"
}

atf_init_test_cases()
{
	for fname in "$srcdir"/*.c; do
		test_name=${fname##*/}
		test_name=${test_name%.c}

		atf_test_case "$test_name"
		eval "${test_name}_body() { check '$test_name'; }"
		atf_add_test_case "$test_name"
	done
}