axe-core/lib/core/utils/aggregateResult.js

Accessibility engine for automated Web UI testing

function copyToGroup(resultObject, subResult, group) {
	var resultCopy = Object.assign({}, subResult);
	resultCopy.nodes = (resultCopy[group] || []).concat();
	axe.constants.resultGroups.forEach((group) => {
		delete resultCopy[group];
	});
	resultObject[group].push(resultCopy);
}

/**
 * Calculates the result of a Rule based on its types and the result of its child Checks
 * @param  {RuleResult} ruleResult The RuleResult to calculate the result of
 */
axe.utils.aggregateResult = function (results) {
	let resultObject = {};

	// Create an array for each type
	axe.constants.resultGroups
		.forEach((groupName) => resultObject[groupName] = []);

	// Fill the array with nodes
	results.forEach(function (subResult) {
		if (subResult.error) {
			copyToGroup(resultObject, subResult, axe.constants.CANTTELL_GROUP);

		} else if (subResult.result === axe.constants.NA) {
			copyToGroup(resultObject, subResult, axe.constants.NA_GROUP);

		} else {
			axe.constants.resultGroups
				.forEach(function (group) {
					if (Array.isArray(subResult[group]) && subResult[group].length > 0	) {
						copyToGroup(resultObject, subResult, group);
					}
				});
		}

	});
	return resultObject;
};