90dceea0e4
Invert the tool↔policy control flow per the file-context event-gate RFC. dsh-tool-fs becomes the executor — it reads/writes/edits through ctx.fs directly, owns read windowing, and dispatches fs/write-expectation / fs/edit-expectation (single-slot waterfalls) plus a contained fs/observed emit. dsh-file-context drops its ctx.fileContext service and becomes a pure event-gate plugin (observed-state + read-before-edit + version-guarded write/edit, decided on those events). The provider's version guard becomes optional so ctx.fs alone is a complete unconstrained text-storage seam: removing the policy plugin gracefully loses the policy instead of breaking the tool at a service-injection boundary.
103 lines
4.2 KiB
TypeScript
103 lines
4.2 KiB
TypeScript
/**
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* Cordis-free tests for the line-windowing module: offset/limit windows, byte
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* caps, per-line truncation, CRLF stripping, offset-past-EOF rejection, and the
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* capped line buffer for newline-free giant lines — all over an async-iterable
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* of decoded text chunks (so one code path serves whole-file and streamed reads).
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*/
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import { describe, expect, it } from 'vitest'
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import { buildWindow, READ_MAX_LINE_LENGTH } from '@deepseek-ai/dsh-tool-fs'
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import type { ReadWindow } from '@deepseek-ai/dsh-tool-fs'
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const READ_ALL: ReadWindow = { offset: 1, limit: 2000 }
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/** Yield `text` as one chunk (whole-file read shape). */
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async function* whole(text: string): AsyncIterable<string> {
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yield text
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}
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/** Yield `text` split into fixed-size chunks (streamed read shape). */
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async function* chunked(text: string, size: number): AsyncIterable<string> {
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for (let i = 0; i < text.length; i += size) yield text.slice(i, i + size)
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}
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describe('buildWindow', () => {
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it('numbers lines and reports total for a whole-file read', async () => {
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const result = await buildWindow(whole('one\ntwo\nthree'), READ_ALL, 'f')
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expect(result.lines).toEqual([
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{ number: 1, text: 'one' },
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{ number: 2, text: 'two' },
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{ number: 3, text: 'three' },
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])
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expect(result.totalLines).toBe(3)
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expect(result.truncatedByBytes).toBe(false)
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})
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it('applies offset/limit', async () => {
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const result = await buildWindow(whole('one\ntwo\nthree\nfour'), { offset: 2, limit: 2 }, 'f')
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expect(result.lines.map(l => l.number)).toEqual([2, 3])
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expect(result.totalLines).toBe(4)
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})
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it('strips CRLF', async () => {
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const result = await buildWindow(whole('one\r\ntwo\r\n'), READ_ALL, 'f')
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expect(result.lines.map(l => l.text)).toEqual(['one', 'two'])
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})
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it('truncates an over-long line', async () => {
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const result = await buildWindow(whole('x'.repeat(3000)), READ_ALL, 'f')
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expect(result.lines[0]?.text).toContain(`... (line truncated to ${READ_MAX_LINE_LENGTH} chars)`)
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})
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it('caps output bytes and reports truncatedByBytes', async () => {
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const big = Array.from({ length: 2000 }, () => 'y'.repeat(100)).join('\n')
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const result = await buildWindow(whole(big), READ_ALL, 'f')
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expect(result.truncatedByBytes).toBe(true)
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})
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it('reads an empty file at offset 1 as zero lines', async () => {
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const result = await buildWindow(whole(''), READ_ALL, 'f')
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expect(result.lines).toEqual([])
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expect(result.totalLines).toBe(0)
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})
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it('rejects an offset past EOF', async () => {
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await expect(buildWindow(whole('one\ntwo'), { offset: 9, limit: 1 }, 'f')).rejects.toMatchObject({ code: 'FS_NOT_FOUND' })
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})
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it('flushes a final line with no trailing newline', async () => {
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const result = await buildWindow(whole('one\ntwo'), READ_ALL, 'f')
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expect(result.lines.map(l => l.text)).toEqual(['one', 'two'])
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})
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it('handles a trailing newline (no dangling empty line)', async () => {
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const result = await buildWindow(whole('one\ntwo\n'), READ_ALL, 'f')
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expect(result.lines.map(l => l.text)).toEqual(['one', 'two'])
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expect(result.totalLines).toBe(2)
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})
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describe('chunked input (streamed read shape)', () => {
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it('windows identically when text arrives in small chunks', async () => {
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const result = await buildWindow(chunked('one\ntwo\nthree', 2), { offset: 2, limit: 1 }, 'f')
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expect(result.lines).toEqual([{ number: 2, text: 'two' }])
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expect(result.totalLines).toBe(3)
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})
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it('caps a newline-free giant line split across chunks without unbounded buffering', async () => {
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const result = await buildWindow(chunked('z'.repeat(5000), 256), READ_ALL, 'f')
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expect(result.lines[0]?.text).toContain(`... (line truncated to ${READ_MAX_LINE_LENGTH} chars)`)
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})
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it('caps output bytes mid-stream', async () => {
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const big = Array.from({ length: 2000 }, () => 'y'.repeat(100)).join('\n')
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const result = await buildWindow(chunked(big, 512), READ_ALL, 'f')
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expect(result.truncatedByBytes).toBe(true)
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})
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it('flushes a final newline-terminated line across a chunk boundary', async () => {
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const result = await buildWindow(chunked('one\ntwo\n', 3), READ_ALL, 'f')
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expect(result.lines.map(l => l.text)).toEqual(['one', 'two'])
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})
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})
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})
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