//
// Tiny assertion helpers shared by the suites. Each suite owns a Checker; the
// process exit code comes from its failure count.
//

class Checker {
    constructor() {
        this.failures = 0;
    }

    /** Records a pass or failure. `detail` is printed only when it fails. */
    check(label, condition, detail) {
        if (condition) {
            console.log(`  ok   ${label}`);
            return true;
        }
        this.failures += 1;
        console.log(`  FAIL ${label}${detail !== undefined ? " — " + detail : ""}`);
        return false;
    }

    /** Deep-ish equality by JSON shape, which is enough for these fixtures. */
    equals(label, actual, expected) {
        return this.check(
            label,
            JSON.stringify(actual) === JSON.stringify(expected),
            `got ${JSON.stringify(actual)}, want ${JSON.stringify(expected)}`,
        );
    }

    section(title) {
        console.log(`\n=== ${title} ===`);
    }

    /** Prints the tally and exits non-zero when anything failed. */
    finish(name) {
        if (this.failures === 0) {
            console.log(`\nALL ${name} PASSED`);
            process.exit(0);
        }
        console.log(`\n${this.failures} ${name} FAILED`);
        process.exit(1);
    }
}

module.exports = { Checker };