| 1 | import { describe, it, vi } from "@effect/vitest" |
| 2 | import * as StackTraceLimit from "effect/internal/stackTraceLimit" |
| 3 | import { assertFalse, assertTrue, strictEqual } from "./utils/assert.ts" |
| 4 | |
| 5 | const getLimit = (): number | undefined => (Error as { stackTraceLimit?: number | undefined }).stackTraceLimit |
| 6 | |
| 7 | describe("stackTraceLimit", () => { |
| 8 | describe("writable environment", () => { |
| 9 | it("isStackTraceLimitWritable returns true", () => { |
| 10 | assertTrue(StackTraceLimit.isStackTraceLimitWritable()) |
| 11 | }) |
| 12 | |
| 13 | it("getStackTraceLimit reflects the current value", () => { |
| 14 | const prev = getLimit() |
| 15 | StackTraceLimit.setStackTraceLimit(5) |
| 16 | strictEqual(StackTraceLimit.getStackTraceLimit(), 5) |
| 17 | StackTraceLimit.setStackTraceLimit(prev) |
| 18 | }) |
| 19 | |
| 20 | it("setStackTraceLimit updates and restores the limit", () => { |
| 21 | const prev = StackTraceLimit.getStackTraceLimit() |
| 22 | StackTraceLimit.setStackTraceLimit(7) |
| 23 | strictEqual(getLimit(), 7) |
| 24 | StackTraceLimit.setStackTraceLimit(prev) |
| 25 | strictEqual(getLimit(), prev) |
| 26 | }) |
| 27 | }) |
| 28 | |
| 29 | describe("frozen intrinsics (non-writable Error.stackTraceLimit)", () => { |
| 30 | // The writability check is cached at module load, so re-import the module |
| 31 | // after redefining the property to exercise the frozen path. |
| 32 | it("degrades to a no-op without throwing", async () => { |
| 33 | const original = Object.getOwnPropertyDescriptor(Error, "stackTraceLimit") |
| 34 | Object.defineProperty(Error, "stackTraceLimit", { |
| 35 | value: 10, |
| 36 | writable: false, |
| 37 | configurable: true, |
| 38 | enumerable: original?.enumerable ?? false |
| 39 | }) |
| 40 | try { |
| 41 | vi.resetModules() |
| 42 | const frozen = await import("effect/internal/stackTraceLimit") |
| 43 | |
| 44 | assertFalse(frozen.isStackTraceLimitWritable()) |
| 45 | |
| 46 | // reading still works |
| 47 | strictEqual(frozen.getStackTraceLimit(), 10) |
| 48 | |
| 49 | // setStackTraceLimit is a silent no-op rather than throwing |
| 50 | frozen.setStackTraceLimit(0) |
| 51 | strictEqual(getLimit(), 10) |
| 52 | } finally { |
| 53 | if (original !== undefined) { |
| 54 | Object.defineProperty(Error, "stackTraceLimit", original) |
| 55 | } |
| 56 | vi.resetModules() |
| 57 | } |
| 58 | }) |
| 59 | }) |
| 60 | }) |