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import { describe, expect, it } from "vitest";
import { prefix } from "../../src/tools/bash-arity.js";
describe("BashArity.prefix", () => {
it("returns arity-2 prefix for known command 'git'", () => {
expect(prefix(["git", "checkout", "main"])).toEqual(["git", "checkout"]);
});
it("returns arity-3 prefix for npm", () => {
expect(prefix(["npm", "run", "dev"])).toEqual(["npm", "run", "dev"]);
});
it("returns arity-2 prefix for bun", () => {
expect(prefix(["bun", "install", "--frozen-lockfile"])).toEqual(["bun", "install"]);
});
it("returns just the command for unknown command", () => {
expect(prefix(["unknowncmd", "arg1", "arg2"])).toEqual(["unknowncmd"]);
});
it("returns empty array for empty tokens", () => {
expect(prefix([])).toEqual([]);
});
it("handles single token for unknown command", () => {
expect(prefix(["ls"])).toEqual(["ls"]);
});
it("handles git with fewer tokens than arity", () => {
expect(prefix(["git"])).toEqual(["git"]);
});
it("handles case-insensitive matching", () => {
expect(prefix(["GIT", "checkout", "main"])).toEqual(["GIT", "checkout"]);
});
});
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