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@@ -1,7 +1,7 @@
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import { describe, test, expect } from "bun:test"
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import { NodeFileSystem } from "@effect/platform-node"
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import { Effect, FileSystem, Layer } from "effect"
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-import { Truncate, Truncate as TruncateSvc } from "../../src/tool/truncate"
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+import { Truncate } from "../../src/tool/truncate"
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import { Identifier } from "../../src/id/id"
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import { Process } from "../../src/util/process"
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import { Filesystem } from "../../src/util/filesystem"
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@@ -12,120 +12,155 @@ import { writeFileStringScoped } from "../lib/filesystem"
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const FIXTURES_DIR = path.join(import.meta.dir, "fixtures")
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const ROOT = path.resolve(import.meta.dir, "..", "..")
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+const it = testEffect(Layer.mergeAll(Truncate.defaultLayer, NodeFileSystem.layer))
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+
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describe("Truncate", () => {
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describe("output", () => {
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- test("truncates large json file by bytes", async () => {
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- const content = await Filesystem.readText(path.join(FIXTURES_DIR, "models-api.json"))
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- const result = await Truncate.output(content)
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-
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("truncated...")
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- if (result.truncated) expect(result.outputPath).toBeDefined()
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- })
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-
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- test("returns content unchanged when under limits", async () => {
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- const content = "line1\nline2\nline3"
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- const result = await Truncate.output(content)
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+ it.live("truncates large json file by bytes", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const content = yield* Effect.promise(() => Filesystem.readText(path.join(FIXTURES_DIR, "models-api.json")))
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+ const result = yield* svc.output(content)
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- expect(result.truncated).toBe(false)
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- expect(result.content).toBe(content)
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- })
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("truncated...")
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+ if (result.truncated) expect(result.outputPath).toBeDefined()
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+ }),
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+ )
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- test("truncates by line count", async () => {
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- const lines = Array.from({ length: 100 }, (_, i) => `line${i}`).join("\n")
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- const result = await Truncate.output(lines, { maxLines: 10 })
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+ it.live("returns content unchanged when under limits", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const content = "line1\nline2\nline3"
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+ const result = yield* svc.output(content)
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("...90 lines truncated...")
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- })
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+ expect(result.truncated).toBe(false)
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+ expect(result.content).toBe(content)
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+ }),
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+ )
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- test("truncates by byte count", async () => {
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- const content = "a".repeat(1000)
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- const result = await Truncate.output(content, { maxBytes: 100 })
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+ it.live("truncates by line count", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const lines = Array.from({ length: 100 }, (_, i) => `line${i}`).join("\n")
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+ const result = yield* svc.output(lines, { maxLines: 10 })
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("truncated...")
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- })
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("...90 lines truncated...")
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+ }),
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+ )
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- test("truncates from head by default", async () => {
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- const lines = Array.from({ length: 10 }, (_, i) => `line${i}`).join("\n")
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- const result = await Truncate.output(lines, { maxLines: 3 })
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+ it.live("truncates by byte count", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const content = "a".repeat(1000)
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+ const result = yield* svc.output(content, { maxBytes: 100 })
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("line0")
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- expect(result.content).toContain("line1")
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- expect(result.content).toContain("line2")
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- expect(result.content).not.toContain("line9")
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- })
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("truncated...")
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+ }),
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+ )
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- test("truncates from tail when direction is tail", async () => {
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- const lines = Array.from({ length: 10 }, (_, i) => `line${i}`).join("\n")
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- const result = await Truncate.output(lines, { maxLines: 3, direction: "tail" })
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+ it.live("truncates from head by default", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const lines = Array.from({ length: 10 }, (_, i) => `line${i}`).join("\n")
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+ const result = yield* svc.output(lines, { maxLines: 3 })
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+
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("line0")
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+ expect(result.content).toContain("line1")
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+ expect(result.content).toContain("line2")
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+ expect(result.content).not.toContain("line9")
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+ }),
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+ )
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("line7")
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- expect(result.content).toContain("line8")
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- expect(result.content).toContain("line9")
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- expect(result.content).not.toContain("line0")
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- })
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+ it.live("truncates from tail when direction is tail", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const lines = Array.from({ length: 10 }, (_, i) => `line${i}`).join("\n")
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+ const result = yield* svc.output(lines, { maxLines: 3, direction: "tail" })
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+
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("line7")
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+ expect(result.content).toContain("line8")
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+ expect(result.content).toContain("line9")
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+ expect(result.content).not.toContain("line0")
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+ }),
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+ )
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test("uses default MAX_LINES and MAX_BYTES", () => {
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expect(Truncate.MAX_LINES).toBe(2000)
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expect(Truncate.MAX_BYTES).toBe(50 * 1024)
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})
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- test("large single-line file truncates with byte message", async () => {
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- const content = await Filesystem.readText(path.join(FIXTURES_DIR, "models-api.json"))
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- const result = await Truncate.output(content)
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-
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("bytes truncated...")
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- expect(Buffer.byteLength(content, "utf-8")).toBeGreaterThan(Truncate.MAX_BYTES)
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- })
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-
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- test("writes full output to file when truncated", async () => {
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- const lines = Array.from({ length: 100 }, (_, i) => `line${i}`).join("\n")
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- const result = await Truncate.output(lines, { maxLines: 10 })
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-
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("The tool call succeeded but the output was truncated")
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- expect(result.content).toContain("Grep")
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- if (!result.truncated) throw new Error("expected truncated")
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- expect(result.outputPath).toBeDefined()
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- expect(result.outputPath).toContain("tool_")
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-
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- const written = await Filesystem.readText(result.outputPath!)
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- expect(written).toBe(lines)
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- })
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+ it.live("large single-line file truncates with byte message", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const content = yield* Effect.promise(() => Filesystem.readText(path.join(FIXTURES_DIR, "models-api.json")))
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+ const result = yield* svc.output(content)
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- test("suggests Task tool when agent has task permission", async () => {
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- const lines = Array.from({ length: 100 }, (_, i) => `line${i}`).join("\n")
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- const agent = { permission: [{ permission: "task", pattern: "*", action: "allow" as const }] }
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- const result = await Truncate.output(lines, { maxLines: 10 }, agent as any)
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("bytes truncated...")
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+ expect(Buffer.byteLength(content, "utf-8")).toBeGreaterThan(Truncate.MAX_BYTES)
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+ }),
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+ )
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("Grep")
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- expect(result.content).toContain("Task tool")
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- })
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+ it.live("writes full output to file when truncated", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const lines = Array.from({ length: 100 }, (_, i) => `line${i}`).join("\n")
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+ const result = yield* svc.output(lines, { maxLines: 10 })
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+
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("The tool call succeeded but the output was truncated")
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+ expect(result.content).toContain("Grep")
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+ if (!result.truncated) throw new Error("expected truncated")
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+ expect(result.outputPath).toBeDefined()
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+ expect(result.outputPath).toContain("tool_")
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+
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+ const written = yield* Effect.promise(() => Filesystem.readText(result.outputPath!))
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+ expect(written).toBe(lines)
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+ }),
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+ )
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- test("omits Task tool hint when agent lacks task permission", async () => {
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- const lines = Array.from({ length: 100 }, (_, i) => `line${i}`).join("\n")
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- const agent = { permission: [{ permission: "task", pattern: "*", action: "deny" as const }] }
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- const result = await Truncate.output(lines, { maxLines: 10 }, agent as any)
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+ it.live("suggests Task tool when agent has task permission", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const lines = Array.from({ length: 100 }, (_, i) => `line${i}`).join("\n")
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+ const agent = { permission: [{ permission: "task", pattern: "*", action: "allow" as const }] }
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+ const result = yield* svc.output(lines, { maxLines: 10 }, agent as any)
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+
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("Grep")
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+ expect(result.content).toContain("Task tool")
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+ }),
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+ )
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- expect(result.truncated).toBe(true)
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- expect(result.content).toContain("Grep")
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- expect(result.content).not.toContain("Task tool")
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- })
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+ it.live("omits Task tool hint when agent lacks task permission", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const lines = Array.from({ length: 100 }, (_, i) => `line${i}`).join("\n")
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+ const agent = { permission: [{ permission: "task", pattern: "*", action: "deny" as const }] }
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+ const result = yield* svc.output(lines, { maxLines: 10 }, agent as any)
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+
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+ expect(result.truncated).toBe(true)
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+ expect(result.content).toContain("Grep")
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+ expect(result.content).not.toContain("Task tool")
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+ }),
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+ )
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- test("does not write file when not truncated", async () => {
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- const content = "short content"
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- const result = await Truncate.output(content)
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+ it.live("does not write file when not truncated", () =>
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+ Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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+ const content = "short content"
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+ const result = yield* svc.output(content)
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- expect(result.truncated).toBe(false)
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- if (result.truncated) throw new Error("expected not truncated")
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- expect("outputPath" in result).toBe(false)
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- })
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+ expect(result.truncated).toBe(false)
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+ if (result.truncated) throw new Error("expected not truncated")
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+ expect("outputPath" in result).toBe(false)
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+ }),
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+ )
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test("loads truncate effect in a fresh process", async () => {
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const out = await Process.run([process.execPath, "run", path.join(ROOT, "src", "tool", "truncate.ts")], {
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@@ -138,10 +173,10 @@ describe("Truncate", () => {
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describe("cleanup", () => {
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const DAY_MS = 24 * 60 * 60 * 1000
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- const it = testEffect(Layer.mergeAll(TruncateSvc.defaultLayer, NodeFileSystem.layer))
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it.live("deletes files older than 7 days and preserves recent files", () =>
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Effect.gen(function* () {
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+ const svc = yield* Truncate.Service
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const fs = yield* FileSystem.FileSystem
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yield* fs.makeDirectory(Truncate.DIR, { recursive: true })
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@@ -151,7 +186,7 @@ describe("Truncate", () => {
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yield* writeFileStringScoped(old, "old content")
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yield* writeFileStringScoped(recent, "recent content")
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- yield* TruncateSvc.Service.use((s) => s.cleanup())
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+ yield* svc.cleanup()
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expect(yield* fs.exists(old)).toBe(false)
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expect(yield* fs.exists(recent)).toBe(true)
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Kit Langton