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#!/bin/sh

# taken from

# https://github.com/ryanbrainard/heroku-buildpack-testrunner/blob/master/lib/test_utils.sh

oneTimeSetUp()

{

TEST_SUITE_CACHE="$(mktemp -d ${SHUNIT_TMPDIR}/test_suite_cache.XXXX)"

}

oneTimeTearDown()

{

rm -rf ${TEST_SUITE_CACHE}

}

setUp()

{

OUTPUT_DIR="$(mktemp -d ${SHUNIT_TMPDIR}/output.XXXX)"

STD_OUT="${OUTPUT_DIR}/stdout"

STD_ERR="${OUTPUT_DIR}/stderr"

BUILD_DIR="${OUTPUT_DIR}/build"

CACHE_DIR="${OUTPUT_DIR}/cache"

mkdir -p ${OUTPUT_DIR}

mkdir -p ${BUILD_DIR}

mkdir -p ${CACHE_DIR}

}

tearDown()

{

rm -rf ${OUTPUT_DIR}

}

capture()

{

resetCapture

LAST_COMMAND="$@"

$@ >${STD_OUT} 2>${STD_ERR}

RETURN=$?

rtrn=${RETURN} # deprecated

}

resetCapture()

{

if [ -f ${STD_OUT} ]; then

rm ${STD_OUT}

fi

if [ -f ${STD_ERR} ]; then

rm ${STD_ERR}

fi

unset LAST_COMMAND

unset RETURN

unset rtrn # deprecated

}

detect()

{

capture ${BUILDPACK_HOME}/bin/detect ${BUILD_DIR}

}

compile()

{

capture ${BUILDPACK_HOME}/bin/compile ${BUILD_DIR} ${CACHE_DIR}

}

release()

{

capture ${BUILDPACK_HOME}/bin/release ${BUILD_DIR}

}

assertCapturedEquals()

{

assertEquals "$@" "$(cat ${STD_OUT})"

}

assertCapturedNotEquals()

{

assertNotEquals "$@" "$(cat ${STD_OUT})"

}

assertCaptured()

{

assertFileContains "$@" "${STD_OUT}"

}

assertNotCaptured()

{

assertFileNotContains "$@" "${STD_OUT}"

}

assertCapturedSuccess()

{

assertEquals "Expected captured exit code to be 0; was <${RETURN}>" "0" "${RETURN}"

assertEquals "Expected STD_ERR to be empty; was <$(cat ${STD_ERR})>" "" "$(cat ${STD_ERR})"

}

# assertCapturedError [[expectedErrorCode] expectedErrorMsg]

assertCapturedError()

{

if [ $# -gt 1 ]; then

local expectedErrorCode=${1}

shift

fi

local expectedErrorMsg=${1:-""}

if [ -z ${expectedErrorCode} ]; then

assertTrue "Expected captured exit code to be greater than 0; was <${RETURN}>" "[ ${RETURN} -gt 0 ]"

else

assertTrue "Expected captured exit code to be <${expectedErrorCode}>; was <${RETURN}>" "[ ${RETURN} -eq ${expectedErrorCode} ]"

fi

if [ "${expectedErrorMsg}" != "" ]; then

assertFileContains "Expected STD_ERR to contain error <${expectedErrorMsg}>" "${expectedErrorMsg}" "${STD_ERR}"

fi

}

_assertContains()

{

if [ 5 -eq $# ]; then

local msg=$1

shift

elif [ ! 4 -eq $# ]; then

fail "Expected 4 or 5 parameters; Receieved $# parameters"

fi

local needle=$1

local haystack=$2

local expectation=$3

local haystack_type=$4

case "${haystack_type}" in

"file") grep -q -F -e "${needle}" ${haystack} ;;

"text") echo "${haystack}" | grep -q -F -e "${needle}" ;;

esac

if [ "${expectation}" != "$?" ]; then

case "${expectation}" in

0) default_msg="Expected <${haystack}> to contain <${needle}>" ;;

1) default_msg="Did not expect <${haystack}> to contain <${needle}>" ;;

esac

fail "${msg:-${default_msg}}"

fi

}

assertContains()

{

_assertContains "$@" 0 "text"

}

assertNotContains()

{

_assertContains "$@" 1 "text"

}

assertFileContains()

{

_assertContains "$@" 0 "file"

}

assertFileNotContains()

{

_assertContains "$@" 1 "file"

}

command_exists () {

type "$1" > /dev/null 2>&1 ;

}

assertFileMD5()

{

expectedHash=$1

filename=$2

if command_exists "md5sum"; then

md5_cmd="md5sum ${filename}"

expected_md5_cmd_output="${expectedHash} ${filename}"

elif command_exists "md5"; then

md5_cmd="md5 ${filename}"

expected_md5_cmd_output="MD5 (${filename}) = ${expectedHash}"

else

fail "no suitable MD5 hashing command found on this system"

fi

assertEquals "${expected_md5_cmd_output}" "`${md5_cmd}`"

}