| string

| undefined) === "get_weather",

);

expect(withIdentity).toBeTruthy();

if (!withIdentity) {

throw new Error("expected tool call delta with identity");

}

const argsJoined = toolCallDeltaRecords

.filter((record) => record.index === 0)

.map(

const finishChunk = toolCallChunks

.flatMap((chunk) => (chunk.choices as Array<Record<string, unknown>> | undefined) ?? [])

.find((choice) => choice.finish_reason === "tool_calls");

expect(finishChunk).toBeTruthy();

if (!finishChunk) {

throw new Error("expected tool_calls finish chunk");

}

}

{

.filter((d) => d !== "[DONE]")

.map((d) => JSON.parse(d) as Record<string, unknown>);

const usageChunk = jsonChunks.find((chunk) => "usage" in chunk);

expect(usageChunk).toBeTruthy();

expect(usageChunk?.choices).toEqual([]);

expect(usageChunk?.usage).toEqual({

if (!usageChunk) {

throw new Error("expected streamed usage chunk");

}

expect(usageChunk.choices).toEqual([]);

expect(usageChunk.usage).toEqual({

prompt_tokens: 12,

completion_tokens: 3,

total_tokens: 15,

const finishChunk = lateToolCallChunks

.flatMap((chunk) => (chunk.choices as Array<Record<string, unknown>> | undefined) ?? [])

.find((choice) => choice.finish_reason === "tool_calls");

expect(finishChunk).toBeTruthy();

if (!finishChunk) {

throw new Error("expected late tool_calls finish chunk");

}

const anyToolCalls = lateToolCallChunks.some((chunk) => {

const choice = ((chunk.choices as Array<Record<string, unknown>> | undefined) ?? [])[0];

const delta = (choice?.delta as Record<string, unknown> | undefined) ?? {};

((chunk.error as { type?: unknown }).type ?? "") === "invalid_request_error" &&

((chunk.error as { message?: unknown }).message ?? "") === "invalid tool configuration",

);

expect(protocolError).toBeTruthy();

if (!protocolError) {

throw new Error("expected invalid tool configuration protocol error");

}

const stopChoice = toolConflictChunks

.flatMap((c) => (c.choices as Array<Record<string, unknown>> | undefined) ?? [])

.find((choice) => choice.finish_reason === "stop");