为什么 jasmine-node 没有获取我的帮助脚本？

Question

This question is likely based in my lack of previous experience with node.js, but I was hoping jasmine-node would just let me run my jasmine specs from the command line.

TestHelper.js:

var helper_func = function() {
    console.log("IN HELPER FUNC");
};

my_test.spec.js:

describe ('Example Test', function() {
  it ('should use the helper function', function() {
    helper_func();
    expect(true).toBe(true);
  }); 
});

Those are the only two files in the directory. Then, when I do:

jasmine-node .

I get

ReferenceError: helper_func is not defined

I'm sure the answer to this is easy, but I didn't find any super-simple intros, or anything obvious on github. Any advice or help would be greatly appreciated!

Thanks!

Answer 1

In node, everything is namespaced to it's js file. To make the function callable by other files, change TestHelper.js to look like this:

var helper_func = function() {
    console.log("IN HELPER FUNC");
};
// exports is the "magic" variable that other files can read
exports.helper_func = helper_func;

And then change your my_test.spec.js to look like this:

// include the helpers and get a reference to it's exports variable
var helpers = require('./TestHelpers');

describe ('Example Test', function() {
  it ('should use the helper function', function() {
    helpers.helper_func(); // note the change here too
    expect(true).toBe(true);
  }); 
});

and, lastly, I believe jasmine-node. will run every file in the directory sequentially - but you don't need to run the helpers. Instead you could move them to a different directory (and change the ./ in the require() to the correct path), or you could just run jasmine-node *.spec.js .

Answer 2

you do not necessarily need to include your helper script in the spec (testing) file if you have the jasmine config as:

{
  "spec_dir": "spec",
  "spec_files": [
    "**/*[sS]pec.js"
  ],
  "helpers": [
    "helpers/**/*.js"
  ],
  "stopSpecOnExpectationFailure": false,
  "random": false
}

Everything in the helpers/ folder will run before the Spec files. In the helpers files have something like this to include your function.

beforeAll(function(){
  this.helper_func = function() {
  console.log("IN HELPER FUNC");
  };
});

you will then be able to make references to it in your spec files