yarn-spinner-runner-ts/dist/tests/jump_detour.test.js

TypeScript parser, compiler, and runtime for Yarn Spinner 3.x with React adapter [NPM package](https://www.npmjs.com/package/yarn-spinner-runner-ts)

import { test } from "node:test";
import { strictEqual } from "node:assert";
import { parseYarn, compile, YarnRunner } from "../index.js";
test("jump and detour", () => {
    const script = `
title: Start
---
Narrator: Go to Next
<<jump Next>>
===

title: Next
---
Narrator: In Next
<<detour Aside>>
Narrator: Back from Aside
===

title: Aside
---
Narrator: Inside Aside
===
`;
    const doc = parseYarn(script);
    const ir = compile(doc);
    const runner = new YarnRunner(ir, { startAt: "Start" });
    const a = runner.currentResult;
    strictEqual(a.type, "text");
    if (a.type === "text")
        strictEqual(/Go to Next/.test(a.text), true, "Expect first line");
    runner.advance(); // executes jump, should produce Next's first line
    const b = runner.currentResult;
    strictEqual(b.type, "text");
    if (b.type === "text")
        strictEqual(/In Next/.test(b.text), true, "Expect Next node line");
    runner.advance(); // should detour into Aside and emit its first line
    const c = runner.currentResult;
    strictEqual(c.type, "text");
    if (c.type === "text")
        strictEqual(/Inside Aside/.test(c.text), true, "Expect detour content");
    runner.advance(); // should return from detour and continue
    const d = runner.currentResult;
    strictEqual(d.type, "text");
    if (d.type === "text")
        strictEqual(/Back from Aside/.test(d.text), true, "Expect return from detour");
});
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