@featurevisor/core

<!doctype html> <html lang="en"> <head> <title>Code coverage report for src/builder/traffic.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <link rel="shortcut icon" type="image/x-icon" href="../../favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="../../index.html">All files</a> / <a href="index.html">src/builder</a> traffic.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 89.55% Statements 60/67 </div> <div class='fl pad1y space-right2'> 78.57% Branches 33/42 </div> <div class='fl pad1y space-right2'> 100% Functions 12/12 </div> <div class='fl pad1y space-right2'> 89.39% Lines 59/66 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. <template id="filterTemplate"> <div class="quiet"> Filter: <input oninput="onInput()" type="search" id="fileSearch"> </div> </template> </div> <div class='status-line high'></div> <pre><table class="coverage"> <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> <a name='L2'></a><a href='#L2'>2</a> <a name='L3'></a><a href='#L3'>3</a> <a name='L4'></a><a href='#L4'>4</a> <a name='L5'></a><a href='#L5'>5</a> <a name='L6'></a><a href='#L6'>6</a> <a name='L7'></a><a href='#L7'>7</a> <a name='L8'></a><a href='#L8'>8</a> <a name='L9'></a><a href='#L9'>9</a> <a name='L10'></a><a href='#L10'>10</a> <a name='L11'></a><a href='#L11'>11</a> <a name='L12'></a><a href='#L12'>12</a> <a name='L13'></a><a href='#L13'>13</a> <a name='L14'></a><a href='#L14'>14</a> <a name='L15'></a><a href='#L15'>15</a> <a name='L16'></a><a href='#L16'>16</a> <a name='L17'></a><a href='#L17'>17</a> <a name='L18'></a><a href='#L18'>18</a> <a name='L19'></a><a href='#L19'>19</a> <a 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getUpdatedAvailableRangesAfterFilling } from "./allocator";   export function detectIfVariationsChanged( yamlVariations: Variation[] | undefined, // as exists in latest YAML existingFeature?: ExistingFeature, // from state file ): boolean { if (!existingFeature || typeof existingFeature.variations === "undefined") { if (Array.isArray(yamlVariations) && yamlVariations.length > 0) { // feature did not previously have any variations, // but now variations have been added return true; }   // variations didn't exist before, and not even now return false; }   const checkVariations = Array.isArray(yamlVariations) ? JSON.stringify(yamlVariations.map(({ value, weight }) => ({ value, weight }))) : undefined;   return ( JSON.stringify( existingFeature.variations.map(({ value, weight }) => ({ value, weight, })), ) !== checkVariations ); }   export function getRulePercentageDiff( trafficPercentage: Percentage, // 0 to 100k existingTrafficRule, ): number { if (!existingTrafficRule) { return 0; }   const existingPercentage = existingTrafficRule.percentage;   return trafficPercentage - existingPercentage; }   export function detectIfRangesChanged( availableRanges: Range[], // as exists in latest YAML existingFeature?: ExistingFeature, // from state file ): boolean { if (!existingFeature) { return false; }   if (!existingFeature.ranges) { return false; }   return JSON.stringify(existingFeature.ranges) !== JSON.stringify(availableRanges); }   export function getTraffic( // from current YAML variations: Variation[] | undefined, parsedRules: Rule[], // from previous release existingFeature: ExistingFeature | undefined, // ranges from group slots ranges?: Range[], ): Traffic[] { const result: Traffic[] = [];   // @NOTE: may be pass from builder directly? const availableRanges = ranges && ranges.length > 0 ? ranges : ([[0, MAX_BUCKETED_NUMBER]] as Range[]);   parsedRules.forEach(function (parsedRule) { const rulePercentage = parsedRule.percentage; // 0 - 100   const traffic: Traffic = { key: parsedRule.key, segments: parsedRule.segments, percentage: rulePercentage * (MAX_BUCKETED_NUMBER / 100), allocation: [], variationWeights: parsedRule.variationWeights, };   // overrides Iif (parsedRule.variables) { traffic.variables = parsedRule.variables; }   Iif (parsedRule.variation) { traffic.variation = parsedRule.variation; }   // detect changes const variationsChanged = detectIfVariationsChanged(variations, existingFeature); const existingTrafficRule = existingFeature?.traffic.find((t) => t.key === parsedRule.key); const rulePercentageDiff = getRulePercentageDiff(traffic.percentage, existingTrafficRule); const rangesChanged = detectIfRangesChanged(availableRanges, existingFeature);   const needsRebucketing = !existingTrafficRule || // new rule variationsChanged || // variations changed rulePercentageDiff < 0 || // percentage decreased rangesChanged || // belongs to a group, and group ranges changed // @NOTE: this means, if variationWeights is present, it will always rebucket. // worth checking if we can maintain consistent bucketing for this use case as well. // but this use case is unlikely to hit in practice because it doesn't matter if the feature itself is 100% rolled out. traffic.variationWeights; // variation weights overridden   let updatedAvailableRanges = JSON.parse(JSON.stringify(availableRanges));   if (existingTrafficRule && existingTrafficRule.allocation && !needsRebucketing) { // increase: build on top of existing allocations let existingSum = 0;   traffic.allocation = existingTrafficRule.allocation.map(function ({ variation, range }) { const result = { variation, range: range, };   existingSum += range[1] - range[0];   return result; });   updatedAvailableRanges = getUpdatedAvailableRangesAfterFilling(availableRanges, existingSum); }   if (Array.isArray(variations)) { variations.forEach(function (variation) { let weight = variation.weight as number;   Iif (traffic.variationWeights && traffic.variationWeights[variation.value]) { // override weight from rule weight = traffic.variationWeights[variation.value]; }   const percentage = weight * (MAX_BUCKETED_NUMBER / 100);   const toFillValue = needsRebucketing ? percentage * (rulePercentage / 100) // whole value : (weight / 100) * rulePercentageDiff; // incrementing const rangesToFill = getAllocation(updatedAvailableRanges, toFillValue);   rangesToFill.forEach(function (range) { if (traffic.allocation) { traffic.allocation.push({ variation: variation.value, range, }); } });   updatedAvailableRanges = getUpdatedAvailableRangesAfterFilling( updatedAvailableRanges, toFillValue, ); }); }   if (traffic.allocation) { traffic.allocation = traffic.allocation.filter((a) => { Iif (a.range && a.range[0] === a.range[1]) { return false; }   return true; });   Iif (traffic.allocation.length === 0) { delete traffic.allocation; } }   result.push(traffic); });   return result; }  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a> at 2025-07-21T22:18:23.206Z </div> <script src="../../prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="../../sorter.js"></script> <script src="../../block-navigation.js"></script> </body> </html>