const fs = require("fs");

const assert = require("assert");

const sinon = require("sinon");

const jQuery = require("jQuery");

function getTempFiles(callback) {

  const contents = fs.readdirSync("/tmp");

  return callback(contents);

}

describe("getTempFiles", () => {

  it("should call the provided callback", () => {

    const spy = sinon.spy();

    getTempFiles(spy);

    assert.equal(spy.callCount, 1);

    assert.ok(spy.getCall(0).args[0] instanceof Array);

  });

  it("should call the function with correct args", () => {

    var object = { method: function() {} };

    var spy = sinon.spy(object, "method");

    object.method(42);

    object.method(1);

    assert.ok(spy.withArgs(42).calledOnce);

    assert.ok(spy.withArgs(1).calledOnce);

  });

  it("should wrap a existing method", () => {

    sinon.spy(jQuery, "ajax");

    jQuery.getJSON("/some/resource");

    assert.ok(jQuery.ajax.calledOnce);

  });

});