107 lines
3.3 KiB
TypeScript
107 lines
3.3 KiB
TypeScript
/**
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* Regression test for the local cost calculation.
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*
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* The provider ships its own cost function because Oh My Pi's legacy pi-ai
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* shim does not export `calculateCost` (see issue #24). This test locks the
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* local implementation to pi-ai's documented per-million-token arithmetic
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* without installing another pi-ai runtime next to the extension.
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*/
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import assert from "node:assert/strict"
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import { describe, it } from "node:test"
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import { calculateCommandCodeCost } from "../src/cost.ts"
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import type { Usage } from "../src/types.ts"
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interface CostTable {
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input: number
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output: number
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cacheRead: number
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cacheWrite: number
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}
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const COST_FIXTURES: Record<string, CostTable> = {
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"zero-cost-model": { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
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"claude-sonnet-4-6": { input: 3, output: 15, cacheRead: 0.3, cacheWrite: 3.75 },
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"deepseek/deepseek-v4-pro": {
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input: 0.435,
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output: 0.87,
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cacheRead: 0.003625,
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cacheWrite: 0,
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},
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"Qwen/Qwen3.7-Max": { input: 1.25, output: 3.75, cacheRead: 0.25, cacheWrite: 1.56 },
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"gpt-5.5": { input: 5, output: 30, cacheRead: 0.5, cacheWrite: 0 },
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}
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const USAGE_CASES = [
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{ input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
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{ input: 1, output: 1, cacheRead: 1, cacheWrite: 1 },
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{ input: 812, output: 187, cacheRead: 52_000, cacheWrite: 3_100 },
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{ input: 1_000_000, output: 65_536, cacheRead: 998_877, cacheWrite: 123_456 },
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{ input: 7, output: 999_999_999, cacheRead: 0.5, cacheWrite: 42 },
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]
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function commandCodeModel(id: string, cost: CostTable) {
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return {
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id,
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api: "commandcode-custom",
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provider: "commandcode",
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cost,
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maxTokens: 65_536,
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}
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}
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function freshUsage(tokens: (typeof USAGE_CASES)[number]): Usage {
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return {
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...tokens,
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totalTokens: tokens.input + tokens.output + tokens.cacheRead + tokens.cacheWrite,
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cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
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}
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}
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function expectedCost(cost: CostTable, tokens: (typeof USAGE_CASES)[number]): Usage["cost"] {
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const input = (cost.input / 1_000_000) * tokens.input
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const output = (cost.output / 1_000_000) * tokens.output
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const cacheRead = (cost.cacheRead / 1_000_000) * tokens.cacheRead
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const cacheWrite = (cost.cacheWrite * tokens.cacheWrite) / 1_000_000
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return {
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input,
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output,
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cacheRead,
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cacheWrite,
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total: input + output + cacheRead + cacheWrite,
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}
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}
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describe("calculateCommandCodeCost()", () => {
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it("applies per-million-token rates to all cost fields", () => {
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for (const [id, cost] of Object.entries(COST_FIXTURES)) {
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const model = commandCodeModel(id, cost)
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for (const tokens of USAGE_CASES) {
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const usage = freshUsage(tokens)
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calculateCommandCodeCost(model, usage)
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assert.deepEqual(
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usage.cost,
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expectedCost(cost, tokens),
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`${id} cost for tokens=${JSON.stringify(tokens)}`,
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)
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}
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}
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})
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it("writes the total as the sum of all cost components", () => {
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const model = commandCodeModel("claude-sonnet-4-6", COST_FIXTURES["claude-sonnet-4-6"])
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const usage = freshUsage({ input: 1_000, output: 500, cacheRead: 10_000, cacheWrite: 2_000 })
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calculateCommandCodeCost(model, usage)
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assert.equal(
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usage.cost.total,
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usage.cost.input + usage.cost.output + usage.cost.cacheRead + usage.cost.cacheWrite,
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)
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assert.ok(usage.cost.total > 0)
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})
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})
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