132 lines
3.1 KiB
Bash
132 lines
3.1 KiB
Bash
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#!/bin/bash
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# Tests bash implementation of cat
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#
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# Copyright (C) 2014 Mike Gerwitz
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#
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# This file is part of pkgsh.
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#
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# pkgsh is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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##
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source src/coreutils/cat.sh
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set -T
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declare -r qcalled=$'\001'
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trap _callset RETURN
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_callset()
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{
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# can't set a var because we're likely in a subshell
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if [ "${FUNCNAME[1]}" == quickcat ]; then
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# quickcat recurses
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if [ "${FUNCNAME[2]}" != quickcat ]; then
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echo -n "$qcalled"
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fi
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fi
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}
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_chk()
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{
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local given="$1" expected="$2"
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[[ "$given" =~ "$qcalled"$ ]] \
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|| assert -z "quickcat not called: $given"
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given="${given%$qcalled}"
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assert "$given" == "$expected"
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}
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_readall()
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{
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local -r var="$1"
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IFS= read -rd '' "$var" || true
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}
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##
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# Leading and trailing whitespace, be it spaces, newlines, or otherwise,
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# should be retained (something that the shell does not normally like doing)
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test-retains-leading-trailing-whitespace()
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{
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_readall val < <( echo -e "\n foo \n" )
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_readall expected < <( command cat <( echo -n "$val" ) )
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_readall given < <( cat <( echo -n "$val" ) )
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_chk "$given" "$expected"
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}
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##
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# If there is no trailing newline, one should not be added
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test-does-not-add-trailing-whitespace()
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{
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_readall expected < <( command cat <( echo -n foo ) )
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_readall given < <( cat <( echo -n foo ) )
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_chk "$given" "$expected"
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}
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##
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# It is, after all, what `cat` is good at
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test-concatenates-multiple-files()
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{
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_readall expected < <( command cat <( echo -n foo ) <( echo "Bar" ) )
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_readall given < <( cat <( echo -n foo ) <( echo "Bar" ) )
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_chk "$given" "$expected"
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}
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##
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# As by convention, `-` means `stdin` and can appear anywhere in the file
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# list
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test-can-read-stdin-via-dash()
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{
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_readall expected < <( command cat <( echo -n foo ) - <<< "Baz" )
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_readall given < <( cat <( echo -n foo ) - <<< "Baz" )
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_chk "$given" "$expected"
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}
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##
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# If no arguments are provided, input is accepted from `stdin`
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test-defaults-to-stdin()
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{
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_readall expected < <( command cat <<< "foo" )
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_readall given < <( cat <<< "foo" )
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_chk "$given" "$expected"
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}
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##
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# We do not currently handle any options; defer to system binary
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test-any-option-defers-to-binary()
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{
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_readall given < <( cat -E <<< "foo" )
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# note that this assertion will implicitly ensure that quickcat was not
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# called; see _callset
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assert "$given" == 'foo$'$'\n'
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}
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test-concatenates-multiple-files
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test-can-read-stdin-via-dash
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test-defaults-to-stdin
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test-retains-leading-trailing-whitespace
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test-does-not-add-trailing-whitespace
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test-any-option-defers-to-binary
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