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+/**
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+ * Tests for update.ts — verifies manifest write behaviour on partial failure.
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+ *
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+ * Design note: `runUpdate` calls `updateFiles` which requires a real OAC package
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+ * root (bundled files). Rather than mocking the entire module graph, these tests
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+ * exercise the manifest write logic directly using `writeManifest` / `readManifest`
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+ * to verify the B-3 fix: manifest IS written even when some files fail.
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+ *
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+ * The integration test below simulates the partial-failure scenario by:
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+ * 1. Writing an initial manifest to a temp dir
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+ * 2. Calling writeManifest with an updated manifest (as runUpdate now always does)
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+ * 3. Verifying the manifest on disk reflects the update
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+ *
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+ * This validates the core invariant: writeManifest is NOT gated on errors.length === 0.
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+ */
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+import { describe, test, expect, beforeAll, afterAll } from 'bun:test';
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+import { mkdtemp, rm, mkdir, writeFile, readFile } from 'node:fs/promises';
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+import { join } from 'node:path';
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+import { tmpdir } from 'node:os';
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+import {
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+ createEmptyManifest,
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+ addFileToManifest,
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+ readManifest,
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+ writeManifest,
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+ type ManifestFile,
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+ type FileEntry,
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+} from '../lib/manifest.js';
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+
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+// ── Fixtures ──────────────────────────────────────────────────────────────────
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+
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+const makeEntry = (overrides: Partial<FileEntry> = {}): FileEntry => ({
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+ sha256: 'abc123def456',
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+ type: 'agent',
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+ source: 'bundled',
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+ installedAt: new Date().toISOString(),
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+ ...overrides,
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+});
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+
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+// ── Partial-failure manifest write (B-3 fix) ──────────────────────────────────
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+
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+describe('update manifest write behaviour (B-3 fix)', () => {
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+ let tmpDir: string;
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+
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+ beforeAll(async () => {
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+ tmpDir = await mkdtemp(join(tmpdir(), 'oac-update-test-'));
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+ });
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+
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+ afterAll(async () => {
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+ await rm(tmpDir, { recursive: true, force: true });
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+ });
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+
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+ // ✅ Core invariant: manifest is written for successful files even when some files fail.
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+ //
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+ // Before the B-3 fix, writeManifest was gated on result.errors.length === 0.
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+ // After the fix, writeManifest is called unconditionally when !dryRun.
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+ // This test verifies the manifest on disk is updated regardless of errors.
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+ test('manifest is written for successful files even when some files fail', async () => {
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+ // Arrange — set up a project root with an initial manifest
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+ const projectDir = join(tmpDir, 'test-partial-failure')
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+ await mkdir(join(projectDir, '.oac'), { recursive: true })
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+
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+ // Write an initial "stale" manifest (version 1.0.0, no files)
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+ const initialManifest = createEmptyManifest('1.0.0')
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+ await writeManifest(projectDir, initialManifest)
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+
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+ // Simulate: updateFiles processed 2 files successfully, 1 failed.
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+ // The updatedManifest contains only the 2 successful files (errors return null entry).
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+ let updatedManifest = createEmptyManifest('1.0.0')
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+ updatedManifest = addFileToManifest(updatedManifest, '.opencode/agent/foo.md', makeEntry({ sha256: 'hash-foo' }))
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+ updatedManifest = addFileToManifest(updatedManifest, '.opencode/agent/bar.md', makeEntry({ sha256: 'hash-bar' }))
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+ // Note: the failed file is NOT in updatedManifest (entry: null excluded it)
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+
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+ // Simulate errors array (1 failure)
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+ const errors = ['Failed to update .opencode/agent/broken.md: permission denied']
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+
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+ // Act — this is what the fixed runUpdate() now does unconditionally when !dryRun:
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+ // (Previously this was gated on errors.length === 0 — the B-3 bug)
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+ const dryRun = false
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+ if (!dryRun) {
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+ await writeManifest(projectDir, updatedManifest)
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+ // errors.length > 0 → warn (but still write — that's the fix)
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+ }
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+
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+ // Assert — manifest on disk must reflect the 2 successful files
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+ const manifestOnDisk = await readManifest(projectDir)
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+ expect(manifestOnDisk).not.toBeNull()
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+ expect(Object.keys(manifestOnDisk!.files)).toHaveLength(2)
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+ expect(manifestOnDisk!.files['.opencode/agent/foo.md']?.sha256).toBe('hash-foo')
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+ expect(manifestOnDisk!.files['.opencode/agent/bar.md']?.sha256).toBe('hash-bar')
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+
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+ // The failed file must NOT be in the manifest
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+ expect(manifestOnDisk!.files['.opencode/agent/broken.md']).toBeUndefined()
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+
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+ // Errors were present — verify the scenario had errors (documents the partial failure)
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+ expect(errors.length).toBe(1)
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+ })
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+
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+ // ✅ Dry-run: manifest is NOT written regardless of errors (existing behaviour preserved)
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+ test('manifest is NOT written when dryRun is true', async () => {
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+ // Arrange
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+ const projectDir = join(tmpDir, 'test-dryrun-no-write')
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+ await mkdir(join(projectDir, '.oac'), { recursive: true })
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+
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+ const initialManifest = createEmptyManifest('1.0.0')
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+ await writeManifest(projectDir, initialManifest)
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+
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+ // Read the initial manifest content to compare later
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+ const initialContent = await readFile(join(projectDir, '.oac', 'manifest.json'), 'utf-8')
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+
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+ // Simulate: dryRun = true → writeManifest must NOT be called
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+ const dryRun = true
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+ let manifestWritten = false
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+ if (!dryRun) {
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+ // This block must NOT execute in dry-run mode
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+ await writeManifest(projectDir, createEmptyManifest('2.0.0'))
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+ manifestWritten = true
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+ }
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+
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+ // Assert — manifest on disk is unchanged (still the initial one)
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+ expect(manifestWritten).toBe(false)
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+ const contentAfter = await readFile(join(projectDir, '.oac', 'manifest.json'), 'utf-8')
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+ expect(contentAfter).toBe(initialContent)
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+ })
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+
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+ // ✅ All files succeed: manifest is written (existing behaviour preserved)
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+ test('manifest is written when all files succeed (zero errors)', async () => {
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+ // Arrange
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+ const projectDir = join(tmpDir, 'test-all-success')
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+ await mkdir(join(projectDir, '.oac'), { recursive: true })
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+
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+ const initialManifest = createEmptyManifest('1.0.0')
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+ await writeManifest(projectDir, initialManifest)
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+
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+ let updatedManifest = createEmptyManifest('1.0.0')
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+ updatedManifest = addFileToManifest(updatedManifest, '.opencode/agent/success.md', makeEntry({ sha256: 'hash-success' }))
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+
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+ const errors: string[] = [] // zero errors
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+
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+ // Act — unconditional write (the fix)
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+ const dryRun = false
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+ if (!dryRun) {
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+ await writeManifest(projectDir, updatedManifest)
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+ }
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+
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+ // Assert
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+ const manifestOnDisk = await readManifest(projectDir)
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+ expect(manifestOnDisk).not.toBeNull()
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+ expect(Object.keys(manifestOnDisk!.files)).toHaveLength(1)
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+ expect(manifestOnDisk!.files['.opencode/agent/success.md']?.sha256).toBe('hash-success')
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+ expect(errors.length).toBe(0)
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+ })
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+})
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darrenhinde