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@@ -0,0 +1,515 @@
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+import { describe, expect, test } from "bun:test"
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+import path from "path"
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+import * as fs from "fs/promises"
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+import { ApplyPatchTool } from "../../src/tool/apply_patch"
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+import { Instance } from "../../src/project/instance"
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+import { FileTime } from "../../src/file/time"
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+import { tmpdir } from "../fixture/fixture"
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+
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+const baseCtx = {
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+ sessionID: "test",
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+ messageID: "",
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+ callID: "",
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+ agent: "build",
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+ abort: AbortSignal.any([]),
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+ metadata: () => {},
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+}
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+
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+type AskInput = {
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+ permission: string
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+ patterns: string[]
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+ always: string[]
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+ metadata: { diff: string }
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+}
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+
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+type ToolCtx = typeof baseCtx & {
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+ ask: (input: AskInput) => Promise<void>
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+}
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+
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+const execute = async (params: { patchText: string }, ctx: ToolCtx) => {
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+ const tool = await ApplyPatchTool.init()
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+ return tool.execute(params, ctx)
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+}
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+
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+const makeCtx = () => {
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+ const calls: AskInput[] = []
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+ const ctx: ToolCtx = {
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+ ...baseCtx,
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+ ask: async (input) => {
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+ calls.push(input)
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+ },
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+ }
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+
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+ return { ctx, calls }
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+}
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+
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+describe("tool.apply_patch freeform", () => {
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+ test("requires patchText", async () => {
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+ const { ctx } = makeCtx()
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+ await expect(execute({ patchText: "" }, ctx)).rejects.toThrow("patchText is required")
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+ })
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+
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+ test("rejects invalid patch format", async () => {
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+ const { ctx } = makeCtx()
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+ await expect(execute({ patchText: "invalid patch" }, ctx)).rejects.toThrow("apply_patch verification failed")
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+ })
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+
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+ test("rejects empty patch", async () => {
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+ const { ctx } = makeCtx()
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+ const emptyPatch = "*** Begin Patch\n*** End Patch"
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+ await expect(execute({ patchText: emptyPatch }, ctx)).rejects.toThrow("patch rejected: empty patch")
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+ })
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+
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+ test("applies add/update/delete in one patch", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx, calls } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const modifyPath = path.join(fixture.path, "modify.txt")
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+ const deletePath = path.join(fixture.path, "delete.txt")
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+ await fs.writeFile(modifyPath, "line1\nline2\n", "utf-8")
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+ await fs.writeFile(deletePath, "obsolete\n", "utf-8")
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+ FileTime.read(ctx.sessionID, modifyPath)
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+ FileTime.read(ctx.sessionID, deletePath)
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+
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+ const patchText =
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+ "*** Begin Patch\n*** Add File: nested/new.txt\n+created\n*** Delete File: delete.txt\n*** Update File: modify.txt\n@@\n-line2\n+changed\n*** End Patch"
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+
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+ const result = await execute({ patchText }, ctx)
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+
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+ expect(result.title).toContain("Success. Updated the following files")
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+ expect(result.output).toContain("Success. Updated the following files")
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+ expect(result.metadata.diff).toContain("Index:")
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+ expect(calls.length).toBe(1)
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+
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+ const added = await fs.readFile(path.join(fixture.path, "nested", "new.txt"), "utf-8")
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+ expect(added).toBe("created\n")
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+ expect(await fs.readFile(modifyPath, "utf-8")).toBe("line1\nchanged\n")
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+ await expect(fs.readFile(deletePath, "utf-8")).rejects.toThrow()
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+ },
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+ })
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+ })
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+
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+ test("applies multiple hunks to one file", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "multi.txt")
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+ await fs.writeFile(target, "line1\nline2\nline3\nline4\n", "utf-8")
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+ FileTime.read(ctx.sessionID, target)
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+
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+ const patchText =
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+ "*** Begin Patch\n*** Update File: multi.txt\n@@\n-line2\n+changed2\n@@\n-line4\n+changed4\n*** End Patch"
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+
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+ await execute({ patchText }, ctx)
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+
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+ expect(await fs.readFile(target, "utf-8")).toBe("line1\nchanged2\nline3\nchanged4\n")
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+ },
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+ })
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+ })
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+
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+ test("inserts lines with insert-only hunk", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "insert_only.txt")
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+ await fs.writeFile(target, "alpha\nomega\n", "utf-8")
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+ FileTime.read(ctx.sessionID, target)
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+
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+ const patchText = "*** Begin Patch\n*** Update File: insert_only.txt\n@@\n alpha\n+beta\n omega\n*** End Patch"
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+
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+ await execute({ patchText }, ctx)
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+
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+ expect(await fs.readFile(target, "utf-8")).toBe("alpha\nbeta\nomega\n")
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+ },
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+ })
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+ })
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+
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+ test("appends trailing newline on update", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "no_newline.txt")
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+ await fs.writeFile(target, "no newline at end", "utf-8")
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+ FileTime.read(ctx.sessionID, target)
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+
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+ const patchText =
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+ "*** Begin Patch\n*** Update File: no_newline.txt\n@@\n-no newline at end\n+first line\n+second line\n*** End Patch"
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+
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+ await execute({ patchText }, ctx)
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+
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+ const contents = await fs.readFile(target, "utf-8")
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+ expect(contents.endsWith("\n")).toBe(true)
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+ expect(contents).toBe("first line\nsecond line\n")
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+ },
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+ })
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+ })
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+
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+ test("moves file to a new directory", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const original = path.join(fixture.path, "old", "name.txt")
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+ await fs.mkdir(path.dirname(original), { recursive: true })
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+ await fs.writeFile(original, "old content\n", "utf-8")
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+ FileTime.read(ctx.sessionID, original)
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+
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+ const patchText =
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+ "*** Begin Patch\n*** Update File: old/name.txt\n*** Move to: renamed/dir/name.txt\n@@\n-old content\n+new content\n*** End Patch"
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+
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+ await execute({ patchText }, ctx)
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+
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+ const moved = path.join(fixture.path, "renamed", "dir", "name.txt")
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+ await expect(fs.readFile(original, "utf-8")).rejects.toThrow()
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+ expect(await fs.readFile(moved, "utf-8")).toBe("new content\n")
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+ },
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+ })
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+ })
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+
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+ test("moves file overwriting existing destination", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const original = path.join(fixture.path, "old", "name.txt")
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+ const destination = path.join(fixture.path, "renamed", "dir", "name.txt")
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+ await fs.mkdir(path.dirname(original), { recursive: true })
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+ await fs.mkdir(path.dirname(destination), { recursive: true })
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+ await fs.writeFile(original, "from\n", "utf-8")
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+ await fs.writeFile(destination, "existing\n", "utf-8")
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+ FileTime.read(ctx.sessionID, original)
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+
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+ const patchText =
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+ "*** Begin Patch\n*** Update File: old/name.txt\n*** Move to: renamed/dir/name.txt\n@@\n-from\n+new\n*** End Patch"
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+
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+ await execute({ patchText }, ctx)
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+
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+ await expect(fs.readFile(original, "utf-8")).rejects.toThrow()
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+ expect(await fs.readFile(destination, "utf-8")).toBe("new\n")
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+ },
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+ })
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+ })
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+
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+ test("adds file overwriting existing file", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "duplicate.txt")
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+ await fs.writeFile(target, "old content\n", "utf-8")
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+
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+ const patchText = "*** Begin Patch\n*** Add File: duplicate.txt\n+new content\n*** End Patch"
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+
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+ await execute({ patchText }, ctx)
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+ expect(await fs.readFile(target, "utf-8")).toBe("new content\n")
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+ },
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+ })
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+ })
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+
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+ test("rejects update when target file is missing", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const patchText = "*** Begin Patch\n*** Update File: missing.txt\n@@\n-nope\n+better\n*** End Patch"
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+
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+ await expect(execute({ patchText }, ctx)).rejects.toThrow(
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+ "apply_patch verification failed: Failed to read file to update",
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+ )
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+ },
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+ })
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+ })
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+
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+ test("rejects delete when file is missing", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const patchText = "*** Begin Patch\n*** Delete File: missing.txt\n*** End Patch"
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+
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+ await expect(execute({ patchText }, ctx)).rejects.toThrow()
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+ },
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+ })
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+ })
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+
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+ test("rejects delete when target is a directory", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const dirPath = path.join(fixture.path, "dir")
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+ await fs.mkdir(dirPath)
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+
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+ const patchText = "*** Begin Patch\n*** Delete File: dir\n*** End Patch"
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+
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+ await expect(execute({ patchText }, ctx)).rejects.toThrow()
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+ },
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+ })
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+ })
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+
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+ test("rejects invalid hunk header", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const patchText = "*** Begin Patch\n*** Frobnicate File: foo\n*** End Patch"
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+
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+ await expect(execute({ patchText }, ctx)).rejects.toThrow("apply_patch verification failed")
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+ },
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+ })
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+ })
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+
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+ test("rejects update with missing context", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "modify.txt")
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+ await fs.writeFile(target, "line1\nline2\n", "utf-8")
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+ FileTime.read(ctx.sessionID, target)
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+
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+ const patchText = "*** Begin Patch\n*** Update File: modify.txt\n@@\n-missing\n+changed\n*** End Patch"
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+
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+ await expect(execute({ patchText }, ctx)).rejects.toThrow("apply_patch verification failed")
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+ expect(await fs.readFile(target, "utf-8")).toBe("line1\nline2\n")
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+ },
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+ })
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+ })
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+
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+ test("verification failure leaves no side effects", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const patchText =
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+ "*** Begin Patch\n*** Add File: created.txt\n+hello\n*** Update File: missing.txt\n@@\n-old\n+new\n*** End Patch"
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+
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+ await expect(execute({ patchText }, ctx)).rejects.toThrow()
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+
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+ const createdPath = path.join(fixture.path, "created.txt")
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+ await expect(fs.readFile(createdPath, "utf-8")).rejects.toThrow()
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+ },
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+ })
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+ })
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+
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+ test("supports end of file anchor", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "tail.txt")
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+ await fs.writeFile(target, "alpha\nlast\n", "utf-8")
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+ FileTime.read(ctx.sessionID, target)
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+
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+ const patchText = "*** Begin Patch\n*** Update File: tail.txt\n@@\n-last\n+end\n*** End of File\n*** End Patch"
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+
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+ await execute({ patchText }, ctx)
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+ expect(await fs.readFile(target, "utf-8")).toBe("alpha\nend\n")
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+ },
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+ })
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+ })
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+
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+ test("rejects missing second chunk context", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "two_chunks.txt")
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+ await fs.writeFile(target, "a\nb\nc\nd\n", "utf-8")
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+ FileTime.read(ctx.sessionID, target)
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+
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+ const patchText = "*** Begin Patch\n*** Update File: two_chunks.txt\n@@\n-b\n+B\n\n-d\n+D\n*** End Patch"
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+
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+ await expect(execute({ patchText }, ctx)).rejects.toThrow()
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+ expect(await fs.readFile(target, "utf-8")).toBe("a\nb\nc\nd\n")
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+ },
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+ })
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+ })
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+
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+ test("disambiguates change context with @@ header", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "multi_ctx.txt")
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+ await fs.writeFile(target, "fn a\nx=10\ny=2\nfn b\nx=10\ny=20\n", "utf-8")
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+ FileTime.read(ctx.sessionID, target)
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+
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+ const patchText = "*** Begin Patch\n*** Update File: multi_ctx.txt\n@@ fn b\n-x=10\n+x=11\n*** End Patch"
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+
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+ await execute({ patchText }, ctx)
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+ expect(await fs.readFile(target, "utf-8")).toBe("fn a\nx=10\ny=2\nfn b\nx=11\ny=20\n")
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+ },
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+ })
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+ })
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+
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+ test("EOF anchor matches from end of file first", async () => {
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+ await using fixture = await tmpdir()
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+ const { ctx } = makeCtx()
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+
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+ await Instance.provide({
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+ directory: fixture.path,
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+ fn: async () => {
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+ const target = path.join(fixture.path, "eof_anchor.txt")
|
|
|
+ // File has duplicate "marker" lines - one in middle, one at end
|
|
|
+ await fs.writeFile(target, "start\nmarker\nmiddle\nmarker\nend\n", "utf-8")
|
|
|
+ FileTime.read(ctx.sessionID, target)
|
|
|
+
|
|
|
+ // With EOF anchor, should match the LAST "marker" line, not the first
|
|
|
+ const patchText =
|
|
|
+ "*** Begin Patch\n*** Update File: eof_anchor.txt\n@@\n-marker\n-end\n+marker-changed\n+end\n*** End of File\n*** End Patch"
|
|
|
+
|
|
|
+ await execute({ patchText }, ctx)
|
|
|
+ // First marker unchanged, second marker changed
|
|
|
+ expect(await fs.readFile(target, "utf-8")).toBe("start\nmarker\nmiddle\nmarker-changed\nend\n")
|
|
|
+ },
|
|
|
+ })
|
|
|
+ })
|
|
|
+
|
|
|
+ test("parses heredoc-wrapped patch", async () => {
|
|
|
+ await using fixture = await tmpdir()
|
|
|
+ const { ctx } = makeCtx()
|
|
|
+
|
|
|
+ await Instance.provide({
|
|
|
+ directory: fixture.path,
|
|
|
+ fn: async () => {
|
|
|
+ const patchText = `cat <<'EOF'
|
|
|
+*** Begin Patch
|
|
|
+*** Add File: heredoc_test.txt
|
|
|
++heredoc content
|
|
|
+*** End Patch
|
|
|
+EOF`
|
|
|
+
|
|
|
+ await execute({ patchText }, ctx)
|
|
|
+ const content = await fs.readFile(path.join(fixture.path, "heredoc_test.txt"), "utf-8")
|
|
|
+ expect(content).toBe("heredoc content\n")
|
|
|
+ },
|
|
|
+ })
|
|
|
+ })
|
|
|
+
|
|
|
+ test("parses heredoc-wrapped patch without cat", async () => {
|
|
|
+ await using fixture = await tmpdir()
|
|
|
+ const { ctx } = makeCtx()
|
|
|
+
|
|
|
+ await Instance.provide({
|
|
|
+ directory: fixture.path,
|
|
|
+ fn: async () => {
|
|
|
+ const patchText = `<<EOF
|
|
|
+*** Begin Patch
|
|
|
+*** Add File: heredoc_no_cat.txt
|
|
|
++no cat prefix
|
|
|
+*** End Patch
|
|
|
+EOF`
|
|
|
+
|
|
|
+ await execute({ patchText }, ctx)
|
|
|
+ const content = await fs.readFile(path.join(fixture.path, "heredoc_no_cat.txt"), "utf-8")
|
|
|
+ expect(content).toBe("no cat prefix\n")
|
|
|
+ },
|
|
|
+ })
|
|
|
+ })
|
|
|
+
|
|
|
+ test("matches with trailing whitespace differences", async () => {
|
|
|
+ await using fixture = await tmpdir()
|
|
|
+ const { ctx } = makeCtx()
|
|
|
+
|
|
|
+ await Instance.provide({
|
|
|
+ directory: fixture.path,
|
|
|
+ fn: async () => {
|
|
|
+ const target = path.join(fixture.path, "trailing_ws.txt")
|
|
|
+ // File has trailing spaces on some lines
|
|
|
+ await fs.writeFile(target, "line1 \nline2\nline3 \n", "utf-8")
|
|
|
+ FileTime.read(ctx.sessionID, target)
|
|
|
+
|
|
|
+ // Patch doesn't have trailing spaces - should still match via rstrip pass
|
|
|
+ const patchText = "*** Begin Patch\n*** Update File: trailing_ws.txt\n@@\n-line2\n+changed\n*** End Patch"
|
|
|
+
|
|
|
+ await execute({ patchText }, ctx)
|
|
|
+ expect(await fs.readFile(target, "utf-8")).toBe("line1 \nchanged\nline3 \n")
|
|
|
+ },
|
|
|
+ })
|
|
|
+ })
|
|
|
+
|
|
|
+ test("matches with leading whitespace differences", async () => {
|
|
|
+ await using fixture = await tmpdir()
|
|
|
+ const { ctx } = makeCtx()
|
|
|
+
|
|
|
+ await Instance.provide({
|
|
|
+ directory: fixture.path,
|
|
|
+ fn: async () => {
|
|
|
+ const target = path.join(fixture.path, "leading_ws.txt")
|
|
|
+ // File has leading spaces
|
|
|
+ await fs.writeFile(target, " line1\nline2\n line3\n", "utf-8")
|
|
|
+ FileTime.read(ctx.sessionID, target)
|
|
|
+
|
|
|
+ // Patch without leading spaces - should match via trim pass
|
|
|
+ const patchText = "*** Begin Patch\n*** Update File: leading_ws.txt\n@@\n-line2\n+changed\n*** End Patch"
|
|
|
+
|
|
|
+ await execute({ patchText }, ctx)
|
|
|
+ expect(await fs.readFile(target, "utf-8")).toBe(" line1\nchanged\n line3\n")
|
|
|
+ },
|
|
|
+ })
|
|
|
+ })
|
|
|
+
|
|
|
+ test("matches with Unicode punctuation differences", async () => {
|
|
|
+ await using fixture = await tmpdir()
|
|
|
+ const { ctx } = makeCtx()
|
|
|
+
|
|
|
+ await Instance.provide({
|
|
|
+ directory: fixture.path,
|
|
|
+ fn: async () => {
|
|
|
+ const target = path.join(fixture.path, "unicode.txt")
|
|
|
+ // File has fancy Unicode quotes (U+201C, U+201D) and em-dash (U+2014)
|
|
|
+ const leftQuote = "\u201C"
|
|
|
+ const rightQuote = "\u201D"
|
|
|
+ const emDash = "\u2014"
|
|
|
+ await fs.writeFile(target, `He said ${leftQuote}hello${rightQuote}\nsome${emDash}dash\nend\n`, "utf-8")
|
|
|
+ FileTime.read(ctx.sessionID, target)
|
|
|
+
|
|
|
+ // Patch uses ASCII equivalents - should match via normalized pass
|
|
|
+ // The replacement uses ASCII quotes from the patch (not preserving Unicode)
|
|
|
+ const patchText =
|
|
|
+ '*** Begin Patch\n*** Update File: unicode.txt\n@@\n-He said "hello"\n+He said "hi"\n*** End Patch'
|
|
|
+
|
|
|
+ await execute({ patchText }, ctx)
|
|
|
+ // Result has ASCII quotes because that's what the patch specifies
|
|
|
+ expect(await fs.readFile(target, "utf-8")).toBe(`He said "hi"\nsome${emDash}dash\nend\n`)
|
|
|
+ },
|
|
|
+ })
|
|
|
+ })
|
|
|
+})
|
Aiden Cline