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[Tests] use a better JSON parsing implementation
This commit is contained in:
Jordan Harband
parent
aa427ad396
commit
e597bb208e
236
test/common.sh
236
test/common.sh
@ -102,104 +102,146 @@ watch() {
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return $EXIT_CODE
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}
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parse_json() {
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local json
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json="$1"
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local key
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key=""
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local value
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value=""
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local output
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output=""
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local in_key
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in_key=0
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local in_value
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in_value=0
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local in_string
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in_string=0
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local escaped
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escaped=0
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local buffer
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buffer=""
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local char
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local len
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len=${#json}
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local arr_index
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arr_index=0
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local in_array
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in_array=0
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for ((i = 0; i < len; i++)); do
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char="${json:i:1}"
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if [ "$in_string" -eq 1 ]; then
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if [ "$escaped" -eq 1 ]; then
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buffer="$buffer$char"
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escaped=0
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elif [ "$char" = "\\" ]; then
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escaped=1
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elif [ "$char" = "\"" ]; then
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in_string=0
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if [ "$in_key" -eq 1 ]; then
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key="$buffer"
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buffer=""
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in_key=0
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elif [ "$in_value" -eq 1 ]; then
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value="$buffer"
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buffer=""
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output="$output$key=\"$value\"\n"
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in_value=0
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elif [ "$in_array" -eq 1 ]; then
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value="$buffer"
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buffer=""
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output="$output$arr_index=\"$value\"\n"
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arr_index=$((arr_index + 1))
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fi
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else
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buffer="$buffer$char"
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fi
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continue
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fi
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case "$char" in
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"\"")
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in_string=1
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buffer=""
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if [ "$in_value" -eq 0 ] && [ "$in_array" -eq 0 ]; then
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in_key=1
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fi
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;;
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":")
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in_value=1
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;;
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",")
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if [ "$in_value" -eq 1 ]; then
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in_value=0
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fi
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;;
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"[")
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in_array=1
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;;
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"]")
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in_array=0
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;;
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"{" | "}")
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;;
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*)
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if [ "$in_value" -eq 1 ] && [ "$char" != " " ] && [ "$char" != "\n" ] && [ "$char" != "\t" ]; then
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buffer="$buffer$char"
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fi
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;;
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esac
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done
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printf "%b" "$output"
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# JSON parsing from https://gist.github.com/assaf/ee377a186371e2e269a7
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nvm_json_throw() {
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nvm_err "$*"
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exit 1
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}
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extract_value() {
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local key
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key="$1"
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local parsed
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parsed="$2"
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echo "$parsed" | grep "^$key=" | cut -d'=' -f2 | tr -d '"'
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nvm_json_awk_egrep() {
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local pattern_string
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pattern_string="${1}"
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awk '{
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while ($0) {
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start=match($0, pattern);
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token=substr($0, start, RLENGTH);
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print token;
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$0=substr($0, start+RLENGTH);
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}
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}' "pattern=${pattern_string}"
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}
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nvm_json_tokenize() {
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local GREP
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GREP='grep -Eao'
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local ESCAPE
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local CHAR
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# if echo "test string" | grep -Eo "test" > /dev/null 2>&1; then
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# ESCAPE='(\\[^u[:cntrl:]]|\\u[0-9a-fA-F]{4})'
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# CHAR='[^[:cntrl:]"\\]'
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# else
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GREP=nvm_json_awk_egrep
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ESCAPE='(\\\\[^u[:cntrl:]]|\\u[0-9a-fA-F]{4})'
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CHAR='[^[:cntrl:]"\\\\]'
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# fi
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local STRING
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STRING="\"${CHAR}*(${ESCAPE}${CHAR}*)*\""
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local NUMBER
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NUMBER='-?(0|[1-9][0-9]*)([.][0-9]*)?([eE][+-]?[0-9]*)?'
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local KEYWORD
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KEYWORD='null|false|true'
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local SPACE
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SPACE='[[:space:]]+'
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$GREP "${STRING}|${NUMBER}|${KEYWORD}|${SPACE}|." | TERM=dumb grep -Ev "^${SPACE}$"
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}
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_json_parse_array() {
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local index=0
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local ary=''
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read -r token
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case "$token" in
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']') ;;
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*)
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while :; do
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_json_parse_value "${1}" "${index}"
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index=$((index+1))
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ary="${ary}${value}"
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read -r token
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case "${token}" in
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']') break ;;
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',') ary="${ary}," ;;
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*) nvm_json_throw "EXPECTED , or ] GOT ${token:-EOF}" ;;
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esac
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read -r token
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done
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;;
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esac
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:
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}
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_json_parse_object() {
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local key
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local obj=''
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read -r token
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case "$token" in
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'}') ;;
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*)
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while :; do
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case "${token}" in
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'"'*'"') key="${token}" ;;
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*) nvm_json_throw "EXPECTED string GOT ${token:-EOF}" ;;
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esac
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read -r token
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case "${token}" in
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':') ;;
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*) nvm_json_throw "EXPECTED : GOT ${token:-EOF}" ;;
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esac
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read -r token
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_json_parse_value "${1}" "${key}"
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obj="${obj}${key}:${value}"
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read -r token
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case "${token}" in
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'}') break ;;
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',') obj="${obj}," ;;
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*) nvm_json_throw "EXPECTED , or } GOT ${token:-EOF}" ;;
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esac
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read -r token
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done
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;;
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esac
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:
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}
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_json_parse_value() {
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local jpath="${1:+$1,}$2"
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local isleaf=0
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local isempty=0
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local print=0
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case "$token" in
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'{') _json_parse_object "${jpath}" ;;
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'[') _json_parse_array "${jpath}" ;;
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# At this point, the only valid single-character tokens are digits.
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''|[!0-9]) nvm_json_throw "EXPECTED value GOT >${token:-EOF}<" ;;
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*)
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value=$token
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isleaf=1
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[ "${value}" = '""' ] && isempty=1
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;;
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esac
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[ "${value}" = '' ] && return
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[ "${isleaf}" -eq 1 ] && [ $isempty -eq 0 ] && print=1
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[ "${print}" -eq 1 ] && printf "[%s]\t%s\n" "${jpath}" "${value}"
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:
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}
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_json_parse() {
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read -r token
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_json_parse_value
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read -r token
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case "${token}" in
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'') ;;
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*) nvm_json_throw "EXPECTED EOF GOT >${token}<" ;;
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esac
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}
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nvm_json_extract() {
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nvm_json_tokenize | _json_parse | grep -e "${1}" | awk '{print $2 $3}'
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}
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@ -14,7 +14,7 @@ for f in ../../../test/fixtures/nvmrc/test/fixtures/valid/*; do
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STDOUT="$(nvm_process_nvmrc $f/.nvmrc 2>/dev/null)"
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EXIT_CODE="$(nvm_process_nvmrc $f/.nvmrc >/dev/null 2>/dev/null; echo $?)"
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EXPECTED="$(extract_value node "$(parse_json "$(cat "$f/expected.json")")")"
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EXPECTED="$(nvm_json_extract node < "${f}/expected.json" | tr -d '"')"
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[ "${EXIT_CODE}" = "0" ] || die "$(basename "${f}"): expected exit code of 0 but got ${EXIT_CODE}"
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@ -26,7 +26,7 @@ for f in ../../../test/fixtures/nvmrc/test/fixtures/invalid/*; do
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STDERR="$(nvm_process_nvmrc $f/.nvmrc 2>&1 >/dev/null | awk '{if(NR > 8) print $0}' | strip_colors)"
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EXIT_CODE="$(nvm_process_nvmrc $f/.nvmrc >/dev/null 2>/dev/null; echo $?)"
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EXPECTED="$(parse_json "$(cat "$f/expected.json")" | sed 's/^[0-9]*="//;s/"$//')"
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EXPECTED="$(nvm_json_extract < "${f}/expected.json" | tr -d '"')"
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[ "${EXIT_CODE}" != "0" ] || die "$(basename "${f}"): expected exit code of 'not 0' but got ${EXIT_CODE}"
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