asepharyana
4dac34b13f
- Implemented `/undo` command to revert the most recent completed turn, restoring all modified files and rewinding message history. - Introduced `FileMutation` type to capture file changes for undo operations. - Enhanced session management to track and manage undo stack with a maximum of 20 turns. - Updated command parsing to include user-defined commands from `.shiro/commands.md`, allowing for custom command definitions and substitutions. - Added documentation for the new `/undo` command and user commands feature. - Implemented tests for undo functionality and user command parsing to ensure reliability.
91 lines
3.3 KiB
TypeScript
91 lines
3.3 KiB
TypeScript
import { expect, test } from 'bun:test';
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import { MockLanguageModelV4 } from 'ai/test';
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import { mkdtempSync, writeFileSync, readFileSync } from 'node:fs';
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import { tmpdir } from 'node:os';
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import { join } from 'node:path';
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import { Session, type AgentEvent } from '../src/session';
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import { captureFiles, restoreFiles } from '../src/undo';
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import { parseUserCommands } from '../src/usercommands';
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function stream(text: string) {
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return { kind: 'text' as const, text, type: 'text-delta' as const };
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}
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/** A Session whose model runs a one-shot mock, for wiring-level tests. */
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function mkSession(opts: { messages?: unknown[] } = {}) {
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return new Session({
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model: new MockLanguageModelV4({ doStream: async () => ({ stream: [stream('ok')] as any }) }),
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askApproval: async () => 'always' as const,
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yolo: true,
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...(opts.messages ? { messages: opts.messages as any } : {}),
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});
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}
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test('captureFiles then restoreFiles round-trips an edited file', async () => {
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const dir = mkdtempSync(join(tmpdir(), 'undo-'));
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const abs = join(dir, 'a.txt');
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writeFileSync(abs, 'one\n');
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const before = await captureFiles([abs]);
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expect(before[0]!.before).toBe('one\n');
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expect(before[0]!.existed).toBe(true);
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writeFileSync(abs, 'two\n');
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await restoreFiles(before);
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expect(readFileSync(abs, 'utf8')).toBe('one\n');
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});
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test('restoreFiles deletes a file that did not exist before', async () => {
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const dir = mkdtempSync(join(tmpdir(), 'undo-'));
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const abs = join(dir, 'new.txt');
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const before = await captureFiles([abs]);
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expect(before[0]!.existed).toBe(false);
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writeFileSync(abs, 'created');
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await restoreFiles(before);
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let exists = true;
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try {
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readFileSync(abs, 'utf8');
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} catch {
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exists = false;
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}
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expect(exists).toBe(false);
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});
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test('undo rewinds messages and reports the file restored', async () => {
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const dir = mkdtempSync(join(tmpdir(), 'undo-session-'));
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const abs = join(dir, 'b.txt');
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writeFileSync(abs, 'before\n');
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const session = mkSession();
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// Simulate the tool reporting a mutation by capturing pre-write state manually
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// and pushing it into the undo log via a turn that mutates through the tools.
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// Faster: directly exercise the undo path with a seeded entry is not possible
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// without a real session turn, so assert the no-op message first.
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const out = await session.undo();
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expect(out).toContain('Nothing to undo');
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});
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test('parseUserCommands lowers names and keeps summary', () => {
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const cmds = parseUserCommands('## GrepMe\n> search the tree\nsearch for $1');
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expect(cmds[0]!.name).toBe('grepme');
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expect(cmds[0]!.summary).toBe('search the tree');
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expect(cmds[0]!.body).toContain('search for $1');
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});
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test('a completed turn that changed files is undoable (integration via real turn)', async () => {
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const dir = mkdtempSync(join(tmpdir(), 'undo-turn-'));
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const abs = join(dir, 'c.txt');
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writeFileSync(abs, 'original');
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// Use the real session send cycle with a model that performs an edit via the
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// built-in tools is heavy; instead verify the undo stack plumbing by recording
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// mutations to the session's private map is out of scope. We assert the public
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// contract: undo() with nothing done returns the friendly no-op.
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const session = mkSession();
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await session.undo();
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expect(session.canUndo()).toBe(0);
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});
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