co-mono/packages/coding-agent/test/system-prompt.test.ts

import { describe, expect, test } from "vitest";
import { buildSystemPrompt } from "../src/core/system-prompt.js";

describe("buildSystemPrompt", () => {
	describe("empty tools", () => {
		test("shows (none) for empty tools list", () => {
			const prompt = buildSystemPrompt({
				selectedTools: [],
				contextFiles: [],
				skills: [],
			});

			expect(prompt).toContain("Available tools:\n(none)");
		});

		test("shows file paths guideline even with no tools", () => {
			const prompt = buildSystemPrompt({
				selectedTools: [],
				contextFiles: [],
				skills: [],
			});

			expect(prompt).toContain("Show file paths clearly");
		});
	});

	describe("default tools", () => {
		test("includes all default tools", () => {
			const prompt = buildSystemPrompt({
				contextFiles: [],
				skills: [],
			});

			expect(prompt).toContain("- read:");
			expect(prompt).toContain("- bash:");
			expect(prompt).toContain("- edit:");
			expect(prompt).toContain("- write:");
		});
	});
});