102 lines
2.6 KiB
TypeScript
102 lines
2.6 KiB
TypeScript
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import { describe, expect, test } from "bun:test";
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import { resolveModel, type ModelResolutionInput } from "./model-resolver";
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describe("resolveModel", () => {
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describe("priority chain", () => {
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test("returns userModel when all three are set", () => {
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// #given
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const input: ModelResolutionInput = {
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userModel: "anthropic/claude-opus-4-5",
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inheritedModel: "openai/gpt-5.2",
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systemDefault: "google/gemini-3-pro",
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};
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// #when
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const result = resolveModel(input);
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// #then
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expect(result).toBe("anthropic/claude-opus-4-5");
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});
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test("returns inheritedModel when userModel is undefined", () => {
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// #given
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const input: ModelResolutionInput = {
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userModel: undefined,
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inheritedModel: "openai/gpt-5.2",
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systemDefault: "google/gemini-3-pro",
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};
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// #when
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const result = resolveModel(input);
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// #then
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expect(result).toBe("openai/gpt-5.2");
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});
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test("returns systemDefault when both userModel and inheritedModel are undefined", () => {
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// #given
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const input: ModelResolutionInput = {
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userModel: undefined,
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inheritedModel: undefined,
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systemDefault: "google/gemini-3-pro",
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};
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// #when
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const result = resolveModel(input);
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// #then
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expect(result).toBe("google/gemini-3-pro");
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});
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});
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describe("empty string handling", () => {
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test("treats empty string as unset, uses fallback", () => {
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// #given
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const input: ModelResolutionInput = {
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userModel: "",
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inheritedModel: "openai/gpt-5.2",
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systemDefault: "google/gemini-3-pro",
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};
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// #when
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const result = resolveModel(input);
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// #then
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expect(result).toBe("openai/gpt-5.2");
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});
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test("treats whitespace-only string as unset, uses fallback", () => {
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// #given
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const input: ModelResolutionInput = {
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userModel: " ",
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inheritedModel: "",
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systemDefault: "google/gemini-3-pro",
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};
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// #when
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const result = resolveModel(input);
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// #then
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expect(result).toBe("google/gemini-3-pro");
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});
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});
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describe("purity", () => {
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test("same input returns same output (referential transparency)", () => {
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// #given
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const input: ModelResolutionInput = {
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userModel: "anthropic/claude-opus-4-5",
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inheritedModel: "openai/gpt-5.2",
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systemDefault: "google/gemini-3-pro",
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};
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// #when
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const result1 = resolveModel(input);
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const result2 = resolveModel(input);
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// #then
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expect(result1).toBe(result2);
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});
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});
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});
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