sequence-grouper

sequence grouper - a simple utility to group sorted items as they are added.

I created this in order to group runs of tests that either passed, failed, or skipped. Grouper makes it easier to report ranges of tests succinctly.

This is a basic implementation that creates the groups but doesn't provide retrieval mechanisms nor does it abstract the individual group from the Grouper implementation. It will come.

sequence-grouper has no dependencies.

Basic usage:

const Grouper = require('sequence-grouper');
 
// make a grouper
const grouper = new Grouper();
 
//
// testResults look like:
// {status, version, details}
// status can be pass, fail, skip
//
testResults.forEach(result => {
  // add each result using status as the key to group by
  grouper.addItem(result, result.status);
})
 
// display the groups
grouper.groups.forEach(g => {
  console.log(`test status ${g.key} (${g.count}) range ${g.first.version} to ${g.last.version}`);
})
 

example output for above:

test status pass (13) range v1.0.0 to v2.7.1
test status skip (1) range v3.0.0-rc1 to v3.0.0-rc1
test status fail (5) range v3.0.0 to v3.1.2