132 lines
9.2 KiB
TypeScript
132 lines
9.2 KiB
TypeScript
import { describe, expect, spyOn, test } from "bun:test";
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import { consumeJsonEvents } from "../src/lib/json-event-stream";
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import { consumeChatCompletionStreamText, consumeGeminiStreamText, consumeResponseStreamText, parseGeminiImagePayload, parseGeminiToolResponse, parseToolResponse, readFetchError, readJsonPayload, responseErrorMessage } from "../src/services/api/image-response";
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import { blobToDataUrl, delay } from "../src/services/api/video-response";
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import type { ChatCompletionStreamState, GeminiStreamState, ResponseStreamState } from "../src/services/api/image-contracts";
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const frame = (payload: unknown) => `data: ${JSON.stringify(payload)}\r\n\r\n`;
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describe("provider response replacement contracts", () => {
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test("JSON event framing survives every chunk boundary, comments, multiple data lines and EOF", () => {
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const stream = ': heartbeat\r\nevent: message\r\ndata: {"text":\r\ndata: "你好"}\r\n\r\ndata: [DONE]\r\n\r\ndata: {"last":true}';
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for (let split = 0; split <= stream.length; split++) {
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const state = { buffer: "" };
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const result: unknown[] = [];
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consumeJsonEvents(state, stream.slice(0, split), (value) => result.push(value));
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consumeJsonEvents(state, stream.slice(split), (value) => result.push(value), true);
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expect(result).toEqual([{ text: "你好" }, { last: true }]);
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expect(state.buffer).toBe("");
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}
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});
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test("invalid JSON fails without dropping the failed frame or its unprocessed tail", () => {
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const state = { buffer: "" };
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const result: unknown[] = [];
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const invalid = 'data: not-json\n\ndata: {"after":true}\n\n';
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expect(() => consumeJsonEvents(state, frame({ before: true }) + invalid, (value) => result.push(value))).toThrow();
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expect(result).toEqual([{ before: true }]);
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expect(state.buffer).toBe(invalid);
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});
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test("Responses delta, done and completion preserve separate channels for every split", () => {
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const payload = { output_text: "AB" };
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const stream = [
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{ type: "response.output_text.delta", delta: "A" },
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{ type: "response.reasoning_summary_text.delta", delta: "why" },
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{ type: "response.output_text.delta", delta: "B" },
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{ type: "response.output_text.done", text: "AB" },
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{ type: "response.reasoning_summary_text.done", text: "why" },
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{ type: "constructor.delta", delta: "ignore" },
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{ type: "response.completed", response: payload },
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].map(frame).join("");
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for (let split = 0; split <= stream.length; split++) {
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const state: ResponseStreamState = { buffer: "", text: "", reasoning: "" };
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const visible: string[] = [], reasoning: string[] = [];
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consumeResponseStreamText(state, stream.slice(0, split), (value) => visible.push(value), (value) => reasoning.push(value));
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consumeResponseStreamText(state, stream.slice(split), (value) => visible.push(value), (value) => reasoning.push(value), true);
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expect(visible).toEqual(["A", "AB"]);
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expect(reasoning).toEqual(["why"]);
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expect(state.payload).toEqual(payload);
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expect(state.buffer).toBe("");
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}
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const state: ResponseStreamState = { buffer: "", text: "", reasoning: "" };
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consumeResponseStreamText(state, frame({ type: "response.output_text.done", text: "complete" }) + frame({ type: "response.reasoning.done", text: "reason" }));
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expect(state).toMatchObject({ text: "complete", reasoning: "reason" });
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consumeResponseStreamText(state, frame({ type: "response.failed", response: { error: { message: "quota" } } }));
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expect(state.error).toBe("quota");
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});
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test("Chat Completions interleaves indexed tool fragments and reasoning aliases", () => {
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const stream = [
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{ choices: [{ delta: { content: "OK", reasoning: "r", tool_calls: [{ index: 3, id: "three", function: { name: "search", arguments: '{"q":' } }, { index: 1, id: "one", function: { name: "read", arguments: '{"id":' } }] } }] },
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{ choices: [{ delta: { reasoning_text: "s", tool_calls: [{ index: 1, function: { arguments: '1}' } }, { index: 3, function: { arguments: '"画布"}' } }] } }] },
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].map(frame).join("");
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for (let split = 0; split <= stream.length; split++) {
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const state: ChatCompletionStreamState = { buffer: "", text: "", reasoning: "", toolCalls: new Map() };
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consumeChatCompletionStreamText(state, stream.slice(0, split));
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consumeChatCompletionStreamText(state, stream.slice(split), undefined, undefined, true);
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expect(state.text).toBe("OK");
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expect(state.reasoning).toBe("rs");
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expect(state.toolCalls.get(1)).toEqual({ id: "one", name: "read", arguments: '{"id":1}' });
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expect(state.toolCalls.get(3)).toEqual({ id: "three", name: "search", arguments: '{"q":"画布"}' });
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}
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});
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test("Gemini preserves thought signatures and tool order without mixing thought text", () => {
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const payload = { candidates: [{ content: { parts: [{ thought: true, text: "plan" }, { text: "answer" }, { functionCall: { id: "a", name: "read", args: { id: 1 } }, thought_signature: "sig-a" }] } }, { content: { parts: [{ functionCall: { id: "b", name: "search" }, thoughtSignature: "sig-b" }] } }] };
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const result = parseGeminiToolResponse(payload);
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expect(result).toEqual({ content: "answer", reasoning: "plan", toolCalls: [
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{ id: "a", type: "function", function: { name: "read", arguments: '{"id":1}' }, thoughtSignature: "sig-a" },
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{ id: "b", type: "function", function: { name: "search", arguments: '{}' }, thoughtSignature: "sig-b" },
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] });
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const stream = frame(payload);
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const state: GeminiStreamState = { buffer: "", text: "", reasoning: "", toolCalls: [] };
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for (const character of stream) consumeGeminiStreamText(state, character);
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expect(state).toMatchObject({ text: "answer", reasoning: "plan", toolCalls: result.toolCalls });
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expect(() => parseGeminiToolResponse({ promptFeedback: { blockReason: "BLOCKED" } })).toThrow("Gemini 拒绝了本次请求：BLOCKED");
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});
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test("image sources preserve MIME and source order; Responses chooses explicit output text", () => {
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expect(parseGeminiImagePayload({ candidates: [{ content: { parts: [
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{ inlineData: { mimeType: "image/jpeg", data: "AAA=" } },
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{ inline_data: { mime_type: "image/webp", data: "BBB=" } },
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{ fileData: { fileUri: "https://example.test/image" } },
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{ text: "ignored" },
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] } }] }).map((image) => image.dataUrl)).toEqual(["data:image/jpeg;base64,AAA=", "data:image/webp;base64,BBB=", "https://example.test/image"]);
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expect(() => parseGeminiImagePayload({ candidates: [] })).toThrow("Gemini 接口没有返回图片");
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expect(parseToolResponse({ output_text: "explicit", output: [{ type: "message", content: [{ text: "fallback" }] }, { type: "function_call", id: "item", call_id: "call", name: "read" }] })).toEqual({
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content: "explicit", toolCalls: [{ id: "call", type: "function", function: { name: "read", arguments: "{}" } }],
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});
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});
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test("HTTP and JSON errors retain precedence and distinguish proxy HTML", async () => {
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expect(responseErrorMessage({ msg: "first", error: { message: "second" }, response: { error: { message: "third" } } })).toBe("first");
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expect(await readFetchError(new Response('{"error":{"message":"denied"}}', { status: 403 }), "失败")).toBe("denied");
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expect(await readFetchError(new Response('{}', { status: 429 }), "失败")).toBe("请求被限流或额度不足，请稍后重试");
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expect(await readFetchError(new Response('x'.repeat(400), { status: 500 }), "失败")).toHaveLength(300);
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await expect(readJsonPayload(new Response('<!doctype html><html>'), "失败")).rejects.toThrow("后端代理返回了前端网页");
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await expect(readJsonPayload(new Response('not-json'), "失败")).rejects.toThrow("接口没有返回有效 JSON");
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});
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test("video polling removes abort listeners on completion and cancellation", async () => {
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const controller = new AbortController();
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const remove = spyOn(controller.signal, "removeEventListener");
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try {
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await delay(0, controller.signal);
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expect(remove).toHaveBeenCalledTimes(1);
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const pending = delay(60_000, controller.signal);
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controller.abort();
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await expect(pending).rejects.toMatchObject({ name: "AbortError" });
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expect(remove).toHaveBeenCalledTimes(2);
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await expect(delay(0, controller.signal)).rejects.toMatchObject({ name: "AbortError" });
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} finally { remove.mockRestore(); }
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});
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test("video data URLs preserve raw bytes and MIME without FileReader", async () => {
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const data = Uint8Array.from({ length: 256 }, (_, i) => i);
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const url = await blobToDataUrl(new Blob([data], { type: "video/webm" }));
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expect(url.startsWith("data:video/webm;base64,")).toBe(true);
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expect(new Uint8Array(await (await fetch(url)).arrayBuffer())).toEqual(data);
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});
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});
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