Agent-System/web/src/lib/durableBodySnippet.test.ts

import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { nextDurableBodySnippet, requireDurableSnippet } from './durableBodySnippet';

describe('durableBodySnippet', () => {
  it('rejects empty persisted snippets', () => {
    assert.throws(() => requireDurableSnippet('  '), /empty_durable_body_snippet/);
    assert.throws(
      () => nextDurableBodySnippet('UI06-old', { kind: 'persisted', snippet: '   ' }),
      /empty_durable_body_snippet/,
    );
  });

  it('lets a later successful revision replace the old snippet', () => {
    const afterUi06 = nextDurableBodySnippet(undefined, { kind: 'persisted', snippet: ' UI06-mu0eq020 ' });
    assert.equal(afterUi06, 'UI06-mu0eq020');
    const afterA1 = nextDurableBodySnippet(afterUi06, { kind: 'persisted', snippet: 'A1-win-mu0eq020' });
    assert.equal(afterA1, 'A1-win-mu0eq020');
    assert.notEqual(afterA1, afterUi06);
  });

  it('does not promote a conflict-failed draft to the expected body', () => {
    const afterUi06 = nextDurableBodySnippet(undefined, { kind: 'persisted', snippet: 'UI06-mu0eq020' });
    const afterA1 = nextDurableBodySnippet(afterUi06, { kind: 'persisted', snippet: 'A1-win-mu0eq020' });
    const afterA2Conflict = nextDurableBodySnippet(afterA1, {
      kind: 'conflict_draft',
      snippet: 'A2-conflict-mu0eq020',
    });
    assert.equal(afterA2Conflict, 'A1-win-mu0eq020');
    assert.notEqual(afterA2Conflict, 'A2-conflict-mu0eq020');
    assert.notEqual(afterA2Conflict, 'UI06-mu0eq020');
  });
});