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| 1 | +import { describe, it, expect } from "vitest"; |
| 2 | +import { summarizeSession, aggregateBy } from "./usage"; |
| 3 | +import type { ChatSession } from "@/types/electron"; |
| 4 | + |
| 5 | +function makeSession(overrides: Partial<ChatSession> = {}): ChatSession { |
| 6 | + return { |
| 7 | + id: "1", |
| 8 | + title: "Test chat", |
| 9 | + model: "openai:gpt-4o-mini", |
| 10 | + messages: [], |
| 11 | + createdAt: "2026-01-01T00:00:00.000Z", |
| 12 | + updatedAt: "2026-01-01T00:00:00.000Z", |
| 13 | + ...overrides, |
| 14 | + }; |
| 15 | +} |
| 16 | + |
| 17 | +describe("summarizeSession", () => { |
| 18 | + it("sums usage across messages and attributes it to the session's current model", () => { |
| 19 | + const usage = summarizeSession( |
| 20 | + makeSession({ |
| 21 | + messages: [ |
| 22 | + { role: "user", content: "hi" }, |
| 23 | + { role: "assistant", content: "hello", usage: { promptTokens: 10, completionTokens: 5 } }, |
| 24 | + { role: "user", content: "more" }, |
| 25 | + { role: "assistant", content: "reply", usage: { promptTokens: 20, completionTokens: 8 } }, |
| 26 | + ], |
| 27 | + }) |
| 28 | + ); |
| 29 | + |
| 30 | + expect(usage.provider).toBe("openai"); |
| 31 | + expect(usage.modelId).toBe("gpt-4o-mini"); |
| 32 | + expect(usage.promptTokens).toBe(30); |
| 33 | + expect(usage.completionTokens).toBe(13); |
| 34 | + expect(usage.cost).not.toBeNull(); |
| 35 | + }); |
| 36 | + |
| 37 | + it("returns null cost for a model with no known pricing", () => { |
| 38 | + const usage = summarizeSession( |
| 39 | + makeSession({ |
| 40 | + model: "ollama:llama3.2", |
| 41 | + messages: [{ role: "assistant", content: "hi", usage: { promptTokens: 10, completionTokens: 5 } }], |
| 42 | + }) |
| 43 | + ); |
| 44 | + expect(usage.cost).toBeNull(); |
| 45 | + expect(usage.promptTokens).toBe(10); |
| 46 | + }); |
| 47 | + |
| 48 | + it("returns zero usage for a session with no usage data", () => { |
| 49 | + const usage = summarizeSession(makeSession({ messages: [{ role: "user", content: "hi" }] })); |
| 50 | + expect(usage.promptTokens).toBe(0); |
| 51 | + expect(usage.completionTokens).toBe(0); |
| 52 | + }); |
| 53 | +}); |
| 54 | + |
| 55 | +describe("aggregateBy", () => { |
| 56 | + it("groups and sums tokens/cost/session count by the given key", () => { |
| 57 | + const usages = [ |
| 58 | + summarizeSession( |
| 59 | + makeSession({ |
| 60 | + id: "a", |
| 61 | + model: "openai:gpt-4o-mini", |
| 62 | + messages: [{ role: "assistant", content: "x", usage: { promptTokens: 10, completionTokens: 5 } }], |
| 63 | + }) |
| 64 | + ), |
| 65 | + summarizeSession( |
| 66 | + makeSession({ |
| 67 | + id: "b", |
| 68 | + model: "openai:gpt-4o-mini", |
| 69 | + messages: [{ role: "assistant", content: "y", usage: { promptTokens: 20, completionTokens: 10 } }], |
| 70 | + }) |
| 71 | + ), |
| 72 | + summarizeSession( |
| 73 | + makeSession({ |
| 74 | + id: "c", |
| 75 | + model: "anthropic:claude-sonnet-5", |
| 76 | + messages: [{ role: "assistant", content: "z", usage: { promptTokens: 5, completionTokens: 5 } }], |
| 77 | + }) |
| 78 | + ), |
| 79 | + ]; |
| 80 | + |
| 81 | + const byModel = aggregateBy(usages, (u) => u.modelId ?? "unknown"); |
| 82 | + const gpt4oMini = byModel.find(([key]) => key === "gpt-4o-mini"); |
| 83 | + expect(gpt4oMini?.[1].sessions).toBe(2); |
| 84 | + expect(gpt4oMini?.[1].tokens).toBe(45); |
| 85 | + }); |
| 86 | +}); |
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