File size: 4,588 Bytes
3201ca6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | import { renderHook } from "@testing-library/react";
import { describe, it, expect, vi, beforeEach } from "vitest";
import useMetricsStore, { type MetricsState } from "#/stores/metrics-store";
import type { TokenUsage } from "#/api/conversation-service/agent-server-conversation-service.types";
const useActiveConversationMock = vi.fn();
const useConversationMetricsMock = vi.fn();
vi.mock("#/hooks/query/use-active-conversation", () => ({
useActiveConversation: () => useActiveConversationMock(),
}));
vi.mock("#/hooks/query/use-conversation-metrics", () => ({
useConversationMetrics: (...args: unknown[]) =>
useConversationMetricsMock(...args),
}));
import { useContextWindowUsage } from "#/hooks/use-context-window-usage";
const CONVERSATION = {
id: "conv-1",
conversation_url: "http://localhost:54928/api/conversations/conv-1",
session_api_key: "sess-key",
};
const storeUsage = (
contextWindow: number,
perTurnToken: number,
): NonNullable<MetricsState["usage"]> => ({
prompt_tokens: 10,
completion_tokens: 20,
cache_read_tokens: 0,
cache_write_tokens: 0,
context_window: contextWindow,
per_turn_token: perTurnToken,
});
// The wire can deliver nulls for any token field even though the SDK type
// says number; the hook's `?? 0` coercion is what these tests pin.
const restUsage = (
contextWindow: number | null,
perTurnToken: number | null,
): TokenUsage =>
({
prompt_tokens: 10,
completion_tokens: 20,
cache_read_tokens: 0,
cache_write_tokens: 0,
context_window: contextWindow,
per_turn_token: perTurnToken,
}) as unknown as TokenUsage;
describe("useContextWindowUsage", () => {
beforeEach(() => {
vi.clearAllMocks();
useMetricsStore.setState({
cost: null,
max_budget_per_task: null,
usage: null,
});
useActiveConversationMock.mockReturnValue({ data: CONVERSATION });
useConversationMetricsMock.mockReturnValue({ data: undefined });
});
it("prefers the live WS store when it reports a usable context window", () => {
useMetricsStore.setState({ usage: storeUsage(200_000, 1234) });
useConversationMetricsMock.mockReturnValue({
data: { accumulated_token_usage: restUsage(128_000, 500) },
});
const { result } = renderHook(() => useContextWindowUsage());
expect(result.current).toEqual({
perTurnToken: 1234,
contextWindow: 200_000,
});
});
it("falls back to the REST snapshot when the store has no usage", () => {
useConversationMetricsMock.mockReturnValue({
data: { accumulated_token_usage: restUsage(128_000, 500) },
});
const { result } = renderHook(() => useContextWindowUsage());
expect(result.current).toEqual({
perTurnToken: 500,
contextWindow: 128_000,
});
});
it("falls through to REST when the store reports a zero context window", () => {
useMetricsStore.setState({ usage: storeUsage(0, 999) });
useConversationMetricsMock.mockReturnValue({
data: { accumulated_token_usage: restUsage(128_000, 500) },
});
const { result } = renderHook(() => useContextWindowUsage());
expect(result.current).toEqual({
perTurnToken: 500,
contextWindow: 128_000,
});
});
it("returns null when no source reports a positive context window", () => {
// The divide-by-zero guard: a model that does not report a context
// window must render no meter at all.
useConversationMetricsMock.mockReturnValue({
data: { accumulated_token_usage: restUsage(0, 500) },
});
const { result } = renderHook(() => useContextWindowUsage());
expect(result.current).toBeNull();
});
it("coerces a null per_turn_token from the wire to zero", () => {
useConversationMetricsMock.mockReturnValue({
data: { accumulated_token_usage: restUsage(128_000, null) },
});
const { result } = renderHook(() => useContextWindowUsage());
expect(result.current).toEqual({
perTurnToken: 0,
contextWindow: 128_000,
});
});
it("polls the REST snapshot only while a conversation is active", () => {
renderHook(() => useContextWindowUsage());
expect(useConversationMetricsMock).toHaveBeenCalledWith(
"conv-1",
CONVERSATION.conversation_url,
"sess-key",
true,
);
useConversationMetricsMock.mockClear();
useActiveConversationMock.mockReturnValue({ data: undefined });
renderHook(() => useContextWindowUsage());
expect(useConversationMetricsMock).toHaveBeenCalledWith(
undefined,
undefined,
undefined,
false,
);
});
});
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