test.js

var expect = require("chai").expect;
var stdMocks = require("./");

describe("Std mocks", function () {
  it("should mocks the two std", function () {
    stdMocks.use();

    console.log("Test log");
    console.error("Test error");

    stdMocks.restore();

    var data = stdMocks.flush();
    expect(data).to.have.nested.property("stdout[0]", "Test log\n");
    expect(data).to.have.nested.property("stderr[0]", "Test error\n");
  });

  it("should be possible to mock only stdout", function () {
    stdMocks.use({ stderr: false });

    console.log("Test log");
    console.error("Test error");

    stdMocks.restore();

    var data = stdMocks.flush();
    expect(data).to.have.nested.property("stdout[0]", "Test log\n");
    expect(data.stderr).to.be.empty;
  });

  it("should be possible to mock only stderr", function () {
    stdMocks.use({ stdout: false });

    console.log("Test log");
    console.error("Test error");

    stdMocks.restore();

    var data = stdMocks.flush();
    expect(data.stdout).to.be.empty;
    expect(data).to.have.nested.property("stderr[0]", "Test error\n");
  });

  it("should be possible to flush only stdout or stderr", function () {
    stdMocks.use();

    console.log("Test log");
    console.error("Test error");

    stdMocks.restore();

    var data = stdMocks.flush({ stderr: false });
    expect(data).to.have.nested.property("stdout[0]", "Test log\n");
    expect(data.stderr).to.not.exists;

    data = stdMocks.flush({ stdout: false });
    expect(data).to.have.nested.property("stderr[0]", "Test error\n");
    expect(data.stdout).to.not.exists;
  });
});