nickva commented on PR #6165:
URL: https://github.com/apache/couchdb/pull/6165#issuecomment-6221344977
A test script to play around with
```shell
#!/bin/sh
set -eu
DB=${DB:-http://adm:[email protected]:15984}
NDOCS=1000
req() {
if [ $# -gt 2 ]; then
curl -s -X "$1" -H content-type:application/json -d "$3" "$DB$2"
else
curl -s -X "$1" "$DB$2"
fi
}
req DELETE "/hbseq" > /dev/null
req PUT "/hbseq?q=1" > /dev/null
FLT="function(doc, req) {var t=Date.now(); while (Date.now()-t < 20) {};
return doc.bad; }"
req PUT "/hbseq/_design/slow" "{\"filters\": {\"f\": \"$FLT\"}}" > /dev/null
docs=""
for ((i = 1; i <= 1000; i++)); do
printf -v id '%05d' "$i"
if (( i == 300 || i == 600)); then
docs="$docs{\"_id\":\"$id\",\"bad\":true},"
else
docs="$docs{\"_id\":\"$id\",\"bad\":false},"
fi
done
req POST "/hbseq/_bulk_docs" "{\"docs\":[${docs%,}]}" > /dev/null
echo
echo "Created $NDOCS in $DB"
echo
echo "Try running these commands"
cat <<'EOF'
curl -N
$DB/hbseq/_changes'?feed=continuous&filter=slow/f&heartbeat=2000&heartbeat_seq=true'
curl -N
$DB/hbseq/_changes'?feed=continuous&filter=slow/f&timeout=5000&heartbeat_seq=true'
curl -N
$DB/hbseq/_changes'?feed=normal&filter=slow/f&heartbeat=2000&heartbeat_seq=true'
curl -N
$DB/hbseq/_changes'?feed=eventsource&filter=slow/f&heartbeat=2000&heartbeat_seq=true'
EOF
echo
echo "Then can periodically create new passing/failing docs"
cat <<'EOF'
curl -XPOST -H'content-type:application/json' $DB/hbseq -d '{"bad":true}'
curl -XPOST -H'content-type:application/json' $DB/hbseq -d '{}'
EOF
echo
```
Example
```
Created 1000 in http://adm:[email protected]:15984
curl -N
$DB/hbseq/_changes'?feed=continuous&filter=slow/f&timeout=5000&heartbeat_seq=true'
{"seq":"249-g1AAAABLeJzLYWBgYMxgTmHgz8tPSTV0MDQy1zMAQsMcoARTIkMeC8N_IMjKYE78mQsUYk9NTE5JMjHC1JAFAM5VE_Y","id":null,"changes":[]}
{"seq":"301-g1AAAABOeJzLYWBgYMxgTmHgz8tPSTV0MDQy1zMAQsMcoARTIkMeC8N_IMjKYE4CKtTNBYqypyYmpySZGGHqyQIA17sTLA","id":"00300","changes":[{"rev":"1-95d23cf29761e3415e35bc22506984e8"}]}
{"seq":"498-g1AAAABOeJzLYWBgYMxgTmHgz8tPSTV0MDQy1zMAQsMcoARTIkMeC8N_IMjKYE4CKvyUCxRlT01MTkkyMcLUkwUA8FsT8Q","id":null,"changes":[]}
{"seq":"601-g1AAAABOeJzLYWBgYMxgTmHgz8tPSTV0MDQy1zMAQsMcoARTIkMeC8N_IMjKYE4C8iNzgaLsqYnJKUkmRph6sgDdXBNZ","id":"00600","changes":[{"rev":"1-95d23cf29761e3415e35bc22506984e8"}]}
{"seq":"739-g1AAAABOeJzLYWBgYMxgTmHgz8tPSTV0MDQy1zMAQsMcoARTIkMeC8N_IMjKYE4C8h_nAkXZUxOTU5JMjDD1ZAEA7pwT4w","id":null,"changes":[]}
{"seq":"975-g1AAAABOeJzLYWBgYMxgTmHgz8tPSTV0MDQy1zMAQsMcoARTIkMeC8N_IMjKYE5iYGA-nwsUZU9NTE5JMjHC1JMFAOw9E9A","id":null,"changes":[]}
{"last_seq":"1001-g1AAAABOeJzLYWBgYMxgTmHgz8tPSTV0MDQy1zMAQsMcoARTIkMeC8N_IMjKYE5iYGB-mQsUZU9NTE5JMjHC1JMFAO99E-o","pending":0}
```
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