// @vitest-environment jsdom

import { describe, expect, it, vi } from "vitest";

import { copyText } from "./copy-text";

function copyDocument(execCommand: (command: string) => boolean) {

return {

body: document.body,

createElement: document.createElement.bind(document),

execCommand,

};

}

describe("copyText", () => {

it("falls back to a selected textarea without Clipboard API", async () => {

const execCommand = vi.fn(() => true);

const copied = await copyText("trace", {

document: copyDocument(execCommand),

});

expect(copied).toBe(true);

expect(execCommand).toHaveBeenCalledWith("copy");

expect(document.querySelector("textarea")).toBeNull();

});

it("falls back after Clipboard API rejects", async () => {

const clipboard = {

writeText: vi.fn(async () => {

throw new Error("not allowed");

}),

};

const execCommand = vi.fn(() => true);

await expect(copyText("trace", {

clipboard,

document: copyDocument(execCommand),

})).resolves.toBe(true);

expect(clipboard.writeText).toHaveBeenCalledWith("trace");

expect(execCommand).toHaveBeenCalledWith("copy");

});

it("reports failure and removes its textarea when both paths fail", async () => {

const execCommand = vi.fn(() => false);

await expect(copyText("trace", {

document: copyDocument(execCommand),

})).resolves.toBe(false);

expect(document.querySelector("textarea")).toBeNull();

});

});