#! /bin/sh
# $NetBSD: t_errors.sh,v 1.37 2023/06/14 19:05:40 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.

# Tests for error handling in indent.

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

expect_error()
{
	local msg

	msg="$1"
	shift

	atf_check -s 'exit:1' \
	    -e "inline:$msg\n" \
	    "$indent" "$@"
}

atf_test_case 'option_unknown'
option_unknown_body()
{
	expect_error \
	    'indent: Command line: unknown option "-Z-unknown"' \
	    -Z-unknown
}

atf_test_case 'option_bool_trailing_garbage'
option_bool_trailing_garbage_body()
{
	expect_error \
	    'indent: Command line: unknown option "-bacchus"' \
	    -bacchus
}

atf_test_case 'option_int_missing_argument'
option_int_missing_argument_body()
{
	expect_error \
	    'indent: Command line: argument "x" to option "-ts" must be an integer' \
	    -tsx
}

atf_test_case 'option_profile_not_found'
option_profile_not_found_body()
{
	expect_error \
	    'indent: profile ./nonexistent: No such file or directory' \
	    -P./nonexistent
}

atf_test_case 'option_typedefs_not_found'
option_typedefs_not_found_body()
{
	expect_error \
	    'indent: cannot open file ./nonexistent' \
	    -U./nonexistent
}

atf_test_case 'option_tabsize_negative'
option_tabsize_negative_body()
{
	expect_error \
	    'indent: Command line: argument "-1" to option "-ts" must be between 1 and 80' \
	    -ts-1
}

atf_test_case 'option_tabsize_zero'
option_tabsize_zero_body()
{
	expect_error \
	    'indent: Command line: argument "0" to option "-ts" must be between 1 and 80' \
	    -ts0
}

atf_test_case 'option_tabsize_large'
option_tabsize_large_body()
{
	expect_error \
	    'indent: Command line: argument "81" to option "-ts" must be between 1 and 80' \
	    -ts81
}

atf_test_case 'option_tabsize_very_large'
option_tabsize_very_large_body()
{
	# Integer overflow, on both ILP32 and LP64 platforms.
	expect_error \
	    'indent: Command line: argument "3000000000" to option "-ts" must be between 1 and 80' \
	    -ts3000000000
}

atf_test_case 'option_indent_size_zero'
option_indent_size_zero_body()
{
	expect_error \
	    'indent: Command line: argument "0" to option "-i" must be between 1 and 80' \
	    -i0
}

atf_test_case 'option_int_trailing_garbage'
option_int_trailing_garbage_body()
{
	expect_error \
	    'indent: Command line: argument "3garbage" to option "-i" must be an integer' \
	    -i3garbage
}

atf_test_case 'option_cli_trailing_garbage'
option_cli_trailing_garbage_body()
{
	expect_error \
	    'indent: Command line: argument "3garbage" to option "-cli" must be numeric' \
	    -cli3garbage
}

atf_test_case 'option_npro_trailing_garbage'
option_npro_trailing_garbage_body()
{
	atf_check -s 'exit:1' \
	    -e 'inline:indent: Command line: unknown option "-npro-garbage"\n' \
	    "$indent" -npro-garbage
}

atf_test_case 'option_st_trailing_garbage'
option_st_trailing_garbage_body()
{
	atf_check -s 'exit:1' \
	    -e 'inline:indent: Command line: unknown option "-stdio"\n' \
	    "$indent" -stdio
}

atf_test_case 'option_version_trailing_garbage'
option_version_trailing_garbage_body()
{
	atf_check -s 'exit:1' \
	    -e 'inline:indent: Command line: unknown option "--version-dump"\n' \
	    "$indent" --version-dump
}

atf_test_case 'option_buffer_overflow'
option_buffer_overflow_body()
{
	opt='12345678123456781234567812345678'	# 32
	opt="$opt$opt$opt$opt$opt$opt$opt$opt"	# 256
	opt="$opt$opt$opt$opt$opt$opt$opt$opt"	# 2048
	opt="$opt$opt$opt$opt$opt$opt$opt$opt"	# 16384
	printf '%s\n' "-$opt" > indent.pro

	expect_error \
	    'indent: buffer overflow in indent.pro, starting with '\''-123456781'\''' \
	    -Pindent.pro
}

atf_test_case 'option_special_missing_param'
option_special_missing_param_body()
{
	expect_error \
	    'indent: Command line: option "-cli" requires an argument' \
	    -cli

	expect_error \
	    'indent: Command line: option "-T" requires an argument' \
	    -T

	expect_error \
	    'indent: Command line: option "-U" requires an argument' \
	    -U
}

atf_test_case 'unterminated_comment_wrap'
unterminated_comment_wrap_body()
{
	echo '/*' > comment.c

	atf_check -s 'exit:1' \
	    -o 'inline:/*\n *\n' \
	    -e 'inline:error: Standard Input:2: Unterminated comment\n' \
	    "$indent" -st < comment.c
}

atf_test_case 'unterminated_comment_nowrap'
unterminated_comment_nowrap_body()
{
	echo '/*-' > comment.c

	atf_check -s 'exit:1' \
	    -o 'inline:/*-\n\n' \
	    -e 'inline:error: Standard Input:2: Unterminated comment\n' \
	    "$indent" -st < comment.c
}

atf_test_case 'unterminated_char_constant'
unterminated_char_constant_body()
{
	echo "char ch = 'x" > char.c

	atf_check -s 'exit:1' \
	    -o "inline:char ch = 'x\n" \
	    -e 'inline:error: Standard Input:1: Unterminated literal\n' \
	    "$indent" -st -di0 < char.c
}

atf_test_case 'unterminated_string_literal'
unterminated_string_literal_body()
{
	echo 'const char str[] = "x' > string.c

	atf_check -s 'exit:1' \
	    -o 'inline:const char str[] = "x\n' \
	    -e 'inline:error: Standard Input:1: Unterminated literal\n' \
	    "$indent" -st -di0 < string.c
}

atf_test_case 'in_place_wrong_backup'
in_place_wrong_backup_body()
{
	cat <<-\EOF > code.c
		int decl;
	EOF
	cp code.c code.c.orig

	# Due to the strange backup suffix '/subdir', indent tries to create
	# a file named 'code.c/subdir', but 'code.c' is already a regular
	# file, not a directory.
	atf_check -s 'exit:1' \
	    -e 'inline:indent: code.c/subdir: Not a directory\n' \
	    env SIMPLE_BACKUP_SUFFIX="/subdir" "$indent" code.c

	# Since there was an early error, the original file is kept as is.
	atf_check -o 'file:code.c.orig' \
	    cat code.c
}

atf_test_case 'argument_input_enoent'
argument_input_enoent_body()
{
	atf_check -s 'exit:1' \
	    -e 'inline:indent: ./nonexistent.c: No such file or directory\n' \
	    "$indent" ./nonexistent.c
}

atf_test_case 'argument_output_equals_input_name'
argument_output_equals_input_name_body()
{
	echo '/* comment */' > code.c

	atf_check -s 'exit:1' \
	    -e 'inline:indent: input and output files must be different\n' \
	    "$indent" code.c code.c
}

atf_test_case 'argument_output_equals_input_file'
argument_output_equals_input_file_body()
{
	echo '/* comment */' > code.c

	atf_check \
	    "$indent" code.c ./code.c

	# Oops, the file has become empty since the output is first emptied,
	# before reading any of the input.
	atf_check \
	    cat code.c
}

atf_test_case 'argument_output_enoent'
argument_output_enoent_body()
{
	expect_error \
	    'indent: subdir/nonexistent.c: No such file or directory' \
	    /dev/null subdir/nonexistent.c
}

atf_test_case 'argument_too_many'
argument_too_many_body()
{
	echo '/* comment */' > arg1.c

	expect_error \
	    'indent: too many arguments: arg3.c' \
	    arg1.c arg2.c arg3.c arg4.c
}

atf_test_case 'unexpected_end_of_file'
unexpected_end_of_file_body()
{
	echo 'struct{' > code.c

	expect_error \
	    'error: code.c:1: Stuff missing from end of file' \
	    code.c

	atf_check \
	    -o 'inline:struct {\n' \
	    cat code.c
}

atf_test_case 'unexpected_closing_brace_top_level'
unexpected_closing_brace_top_level_body()
{
	echo '}' > code.c

	expect_error \
	    'error: code.c:1: Statement nesting error' \
	    code.c
	atf_check \
	    -o 'inline:}\n' \
	    cat code.c
}

atf_test_case 'unexpected_closing_brace_decl'
unexpected_closing_brace_decl_body()
{
	echo 'int i = 3};' > code.c

	expect_error \
	    'error: code.c:1: Statement nesting error' \
	    code.c
	# Despite the error message, the original file got overwritten with a
	# best-effort rewrite of the code.
	atf_check \
	    -o 'inline:int		i = 3};\n' \
	    cat code.c
}

atf_test_case 'unbalanced_parentheses'
unbalanced_parentheses_body()
{
	cat <<-\EOF > code.c
		int var =
		(
		;
		)
		;
	EOF
	cat <<-\EOF > stderr.exp
		error: code.c:3: Unbalanced parentheses
		warning: code.c:4: Extra ')'
	EOF

	atf_check -s 'exit:1' -e 'file:stderr.exp' \
	    "$indent" code.c
}

atf_test_case 'gcc_statement_expression'
gcc_statement_expression_body()
{
	# '({...})' is the GCC extension "Statement expression".
	cat <<-\EOF > code.c
		int var =
		(
		1
		}
		;
	EOF
	cat <<-\EOF > stderr.exp
		error: code.c:4: Unbalanced parentheses
		error: code.c:4: Statement nesting error
	EOF

	atf_check -s 'exit:1' -e 'file:stderr.exp' \
	    "$indent" code.c
}

atf_test_case 'crash_comment_after_controlling_expression'
crash_comment_after_controlling_expression_body()
{
	# Before 2023-05-11, indent crashed while
	# trying to format the following artificial code.

	printf '{if(expr\n)/*c*/;}\n' > code.c

	cat <<\EOF > code.exp
{
	if (expr
		) /* c */;
}
EOF

	atf_check -o 'file:code.exp' \
	    "$indent" code.c -st
}

atf_test_case 'comment_fits_in_one_line'
comment_fits_in_one_line_body()
{
	# The comment is placed after 'if (0) ...'. Before NetBSD pr_comment.c
	# 1.91 from 2021-10-30, this produced an assertion failure in
	# fits_in_one_line.
	cat <<EOF > code.c
int f(void)
{
	if (0)
		/* 0123456789012345678901 */;
}
EOF

	# Indent tries hard to make the comment fit to the 34-character line
	# length, but it is just not possible.
	cat <<EOF > expected.out
int
f(void)
{
	if (0)
		/*
		 * 0123456789012345678901
		 */;
}
EOF

	atf_check -o 'file:expected.out' \
	    "$indent" -l34 code.c -st
}

atf_test_case 'stack_overflow'
stack_overflow_body()
{
	cat <<-EOF > code.c
		{{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{
		{{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{
		{{{{{{{{{{ {{{{{{{{{{ {{{{{{{
	EOF

	atf_check \
	    -s 'exit:1' \
	    -e 'inline:error: code.c:3: Stuff missing from end of file\n' \
	    "$indent" code.c

	cat <<-EOF > code.c
		{{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{
		{{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{ {{{{{{{{{{
		{{{{{{{{{{ {{{{{{{{{{ {{{{{{{ {
	EOF

	atf_check \
	    -s 'exit:1' \
	    -e 'inline:error: code.c:3: Stuff missing from end of file\n' \
	    "$indent" code.c
}


atf_init_test_cases()
{
	atf_add_test_case 'option_unknown'
	atf_add_test_case 'option_bool_trailing_garbage'
	atf_add_test_case 'option_int_missing_argument'
	atf_add_test_case 'option_profile_not_found'
	atf_add_test_case 'option_buffer_overflow'
	atf_add_test_case 'option_typedefs_not_found'
	atf_add_test_case 'option_special_missing_param'
	atf_add_test_case 'option_tabsize_negative'
	atf_add_test_case 'option_tabsize_zero'
	atf_add_test_case 'option_tabsize_large'
	atf_add_test_case 'option_tabsize_very_large'
	atf_add_test_case 'option_int_trailing_garbage'
	atf_add_test_case 'option_cli_trailing_garbage'
	atf_add_test_case 'option_npro_trailing_garbage'
	atf_add_test_case 'option_st_trailing_garbage'
	atf_add_test_case 'option_version_trailing_garbage'
	atf_add_test_case 'option_indent_size_zero'
	atf_add_test_case 'unterminated_comment_wrap'
	atf_add_test_case 'unterminated_comment_nowrap'
	atf_add_test_case 'unterminated_char_constant'
	atf_add_test_case 'unterminated_string_literal'
	atf_add_test_case 'in_place_wrong_backup'
	atf_add_test_case 'argument_input_enoent'
	atf_add_test_case 'argument_output_equals_input_name'
	atf_add_test_case 'argument_output_equals_input_file'
	atf_add_test_case 'argument_output_enoent'
	atf_add_test_case 'argument_too_many'
	atf_add_test_case 'unexpected_end_of_file'
	atf_add_test_case 'unexpected_closing_brace_top_level'
	atf_add_test_case 'unexpected_closing_brace_decl'
	atf_add_test_case 'unbalanced_parentheses'
	atf_add_test_case 'gcc_statement_expression'
	atf_add_test_case 'crash_comment_after_controlling_expression'
	atf_add_test_case 'comment_fits_in_one_line'
	atf_add_test_case 'stack_overflow'
}