Yaowei Zheng
46 lines
1.9 KiB
TypeScript
46 lines
1.9 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import { describeError } from "../src/llm/generative-model.js";
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describe("describeError", () => {
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it("walks the cause chain, surfacing the real reason behind a wrapper like 'terminated'", () => {
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// Node's fetch throws TypeError("terminated") with the actual transport failure on cause.
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const cause = Object.assign(new Error("other side closed"), { code: "UND_ERR_SOCKET" });
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const err = new TypeError("terminated", { cause });
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expect(describeError(err)).toBe("terminated: other side closed (UND_ERR_SOCKET)");
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});
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it("appends a top-level error code when not already in the message", () => {
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const err = Object.assign(new Error("connect failed"), { code: "ECONNREFUSED" });
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expect(describeError(err)).toBe("connect failed (ECONNREFUSED)");
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});
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it("does not duplicate a code already present in the message", () => {
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const err = Object.assign(new Error("connect ECONNREFUSED 1.2.3.4:443"), {
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code: "ECONNREFUSED",
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});
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expect(describeError(err)).toBe("connect ECONNREFUSED 1.2.3.4:443");
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});
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it("returns a plain message unchanged and stringifies non-Errors", () => {
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expect(describeError(new Error("boom"))).toBe("boom");
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expect(describeError("nope")).toBe("nope");
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});
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it("keeps a non-Error cause tail and de-duplicates repeated segments", () => {
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expect(describeError(new Error("outer", { cause: "inner reason" }))).toBe(
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"outer: inner reason",
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);
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const a = new Error("same");
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(a as { cause?: unknown }).cause = new Error("same"); // duplicate message, dropped
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expect(describeError(a)).toBe("same");
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});
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it("guards against a cyclic cause chain", () => {
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const a = new Error("a");
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const b = new Error("b");
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(a as { cause?: unknown }).cause = b;
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(b as { cause?: unknown }).cause = a; // cycle
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expect(describeError(a)).toBe("a: b");
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});
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});
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