Function splitCode

tests/browser/coverage.js:13–42

* @param {string} code * @param {{start: number; end: number}[]} ranges * @returns {CodePart[]}

(code, ranges)

 * @returns {CodePart[]}
 */
function splitCode(code, ranges) {
    /** @type {CodePart[]} */
    const parts = [];

    if (ranges.length === 0) {
        parts.push({text: code, covered: false});
        return;
    }

    if (ranges[0].start > 0) {
        parts.push({text: code.substring(0, ranges[0].start), covered: false});
    }

    const lastRange = ranges[ranges.length - 1];

    for (let i = 0; i < ranges.length; i++) {
        const range = ranges[i];
        parts.push({text: code.substring(range.start, range.end), covered: true});
        if (range !== lastRange) {
            const nextRange = ranges[i + 1];
            parts.push({text: code.substring(range.end, nextRange.start), covered: false});
        }
    }

    if (lastRange.end < code.length) {
        parts.push({text: code.substring(lastRange.end), covered: false});
    }

    return parts;
}

function red(/** @type {string} */text) {
    return `\x1b[31m${text}\x1b[0m`;