(() => {
     let i = -1;
     for (let [x1, x2] of zip(v1, v2)) {
         ++i;
         if (!util.createElementComparator(x2)(x1)) {
             iteratorFailures.push(`${i}: ${format(this, x1, x2, ' !== ')}`);
         }
     }
 })();

 test(`json and arrow buffers report the same values`, () => {
     expect.hasAssertions();
     const jsonVectors = toArray(read(jsonData));
     const binaryVectors = toArray(read(arrowBuffers));
     for (const [jVectors, bVectors] of zip(jsonVectors, binaryVectors)) {
         expect(jVectors.length).toEqual(bVectors.length);
         for (let i = -1, n = jVectors.length; ++i < n;) {
             (expect(jVectors[i]) as any).toEqualVector(bVectors[i]);
         }
     }
 });

 test(`json and arrow record batches report the same values`, () => {
     expect.hasAssertions();
     const jsonRecordBatches = toArray(read(jsonData));
     const binaryRecordBatches = toArray(read(arrowBuffer));
     for (const [jsonRecordBatch, binaryRecordBatch] of zip(jsonRecordBatches, binaryRecordBatches)) {
         expect(jsonRecordBatch.length).toEqual(binaryRecordBatch.length);
         expect(jsonRecordBatch.numCols).toEqual(binaryRecordBatch.numCols);
         for (let i = -1, n = jsonRecordBatch.numCols; ++i < n;) {
             (jsonRecordBatch.getChildAt(i) as any).name = jsonRecordBatch.schema.fields[i].name;
             (expect(jsonRecordBatch.getChildAt(i)) as any).toEqualVector(binaryRecordBatch.getChildAt(i));
         }
     }
 });

        .map((p) => path.resolve(p))
        .map((p) => {
            if (fs.existsSync(p)) {
                return p;
            }
            console.error(`Could not find file "${p}"`);
            return undefined;
        });
}

const getOrReadFileBuffer = ((cache: any) => function getFileBuffer(path: string, ...args: any[]) {
    return cache[path] || (cache[path] = fs.readFileSync(path, ...args));
})({});

const jsonAndArrowPaths = toArray(zip(
    resolvePathArgs(process.env.JSON_PATHS!),
    resolvePathArgs(process.env.ARROW_PATHS!)
))
.filter(([p1, p2]) => p1 !== undefined && p2 !== undefined) as [string, string][];

expect.extend({
    toEqualVector([v1, format1, columnName]: [any, string, string], [v2, format2]: [any, string]) {

        const format = (x: any, y: any, msg= ' ') => `${
            this.utils.printExpected(x)}${
                msg}${
            this.utils.printReceived(y)
        }`;

        let getFailures = new Array<string>();
        let propsFailures = new Array<string>();
        let iteratorFailures = new Array<string>();

        for (let i = -1, n = props.length; ++i < n;) {
            const prop = props[i];
            if (this.utils.stringify(v1[prop]) !== this.utils.stringify(v2[prop])) {
                propsFailures.push(`${prop}: ${format(v1[prop], v2[prop], ' !== ')}`);
            }
        }

        for (let i = -1, n = v1.length; ++i < n;) {
            let x1 = v1.get(i), x2 = v2.get(i);
            if (this.utils.stringify(x1) !== this.utils.stringify(x2)) {
                getFailures.push(`${i}: ${format(x1, x2, ' !== ')}`);
            }
        }

        let i = -1;
        for (let [x1, x2] of zip(v1, v2)) {
            ++i;
            if (this.utils.stringify(x1) !== this.utils.stringify(x2)) {
                iteratorFailures.push(`${i}: ${format(x1, x2, ' !== ')}`);
            }
        }

        return {
            pass: allFailures.every(({ failures }) => failures.length === 0),
            message: () => [
                `${v1.name}: (${format('json', 'arrow', ' !== ')})\n`,
                ...allFailures.map(({ failures, title }) =>
                    !failures.length ? `` : [`${title}:`, ...failures].join(`\n`))
            ].join('\n')
        };
    }