import { describe, expect, it } from "vitest";import { DEFAULT_MODEL_BY_PROVIDER, MODEL_OPTIONS_BY_PROVIDER } from "@t3tools/contracts"; import {  getDefaultModel,  getDefaultReasoningEffort,  getModelOptions,  getReasoningEffortOptions,  normalizeModelSlug,  resolveModelSlug,} from "./model"; describe("normalizeModelSlug", () => {  it("maps known aliases to canonical slugs", () => {    expect(normalizeModelSlug("5.3")).toBe("gpt-5.3-codex");    expect(normalizeModelSlug("gpt-5.3")).toBe("gpt-5.3-codex");  });   it("returns null for empty or missing values", () => {    expect(normalizeModelSlug("")).toBeNull();    expect(normalizeModelSlug("   ")).toBeNull();    expect(normalizeModelSlug(null)).toBeNull();    expect(normalizeModelSlug(undefined)).toBeNull();  });   it("preserves non-aliased model slugs", () => {    expect(normalizeModelSlug("gpt-5.2")).toBe("gpt-5.2");    expect(normalizeModelSlug("gpt-5.2-codex")).toBe("gpt-5.2-codex");  });   it("does not leak prototype properties as aliases", () => {    expect(normalizeModelSlug("toString")).toBe("toString");    expect(normalizeModelSlug("constructor")).toBe("constructor");  });}); describe("resolveModelSlug", () => {  it("returns default only when the model is missing", () => {    expect(resolveModelSlug(undefined)).toBe(DEFAULT_MODEL_BY_PROVIDER.codex);    expect(resolveModelSlug(null)).toBe(DEFAULT_MODEL_BY_PROVIDER.codex);  });   it("preserves unknown custom models", () => {    expect(resolveModelSlug("gpt-4.1")).toBe(DEFAULT_MODEL_BY_PROVIDER.codex);    expect(resolveModelSlug("custom/internal-model")).toBe(DEFAULT_MODEL_BY_PROVIDER.codex);  });   it("resolves only supported model options", () => {    for (const model of MODEL_OPTIONS_BY_PROVIDER.codex) {      expect(resolveModelSlug(model.slug)).toBe(model.slug);    }  });  it("keeps codex defaults for backward compatibility", () => {    expect(getDefaultModel()).toBe(DEFAULT_MODEL_BY_PROVIDER.codex);    expect(getModelOptions()).toEqual(MODEL_OPTIONS_BY_PROVIDER.codex);  });}); describe("getReasoningEffortOptions", () => {  it("returns codex reasoning options for codex", () => {    expect(getReasoningEffortOptions("codex")).toEqual(["xhigh", "high", "medium", "low"]);  });}); describe("getDefaultReasoningEffort", () => {  it("returns provider-scoped defaults", () => {    expect(getDefaultReasoningEffort("codex")).toBe("high");  });});