@applicaster/zapplicaster-cli/src/commands/__tests__/commands.test.js

CLI Tool for the zapp app and Quick Brick project

const R = require("ramda");
const { registerCommand, commands } = require("../index");

jest.mock("commander");
jest.mock("fs", () => require("../../../test_helpers/fsMock"));
const program = require("commander");
const programCommand = jest.spyOn(program, "command");
const programOption = jest.spyOn(program, "option");
const programAction = jest.spyOn(program, "action");

describe("commands", () => {
  it("is an array with 7 entry", () => {
    expect(Array.isArray(commands)).toBe(true);
    expect(commands).toHaveLength(7);
  });

  it("each item has the appropriate structure", () => {
    commands.forEach((command) => {
      expect(command).toHaveProperty("syntax");
      expect(typeof command.syntax).toBe("string");
      expect(command).toHaveProperty("options");
      expect(Array.isArray(command.options)).toBe(true);
      expect(command).toHaveProperty("action");
      expect(typeof command.action).toBe("function");
    });
  });
});

describe("registerCommand", () => {
  let commandRegistrationFunction;

  beforeEach(() => {
    commandRegistrationFunction = registerCommand(program);
  });

  it("returns a function", () => {
    expect(typeof commandRegistrationFunction).toBe("function");
  });

  it("invokes the proper commander methods", () => {
    commandRegistrationFunction(commands[0]);

    expect(programCommand).toHaveBeenCalledTimes(1);
    expect(programCommand).toHaveBeenCalledWith(commands[0].syntax);
    expect(programOption).toHaveBeenCalledTimes(commands[0].options.length);

    expect(programOption).toHaveBeenLastCalledWith(
      ...R.last(commands[0].options)
    );

    expect(programAction).toHaveBeenCalledTimes(1);
    expect(programAction).toHaveBeenCalledWith(commands[0].action);
  });
});