Any suggestions for running mocha tests multiple times against different scenarios?

[Sam Roberts]

I'm about to pull the test functions out into basically a library, and
essentially do:

describe('apples', function() {
should('taste good', fruit.tastesGood('apple'));
}

describe('oranges', function
.... tastesGood('orange')


Is there a better way? Basically I have multiple implementations of an
interface, and they should have the same behaviour, so I want them to
pass the same tests. Possibly with different beforeEach() fixtures.

Thanks,
Sam

[Josh Faul]

Check out the info on shared behaviors in the mocha wiki:  https://github.com/visionmedia/mocha/wiki/Shared-Behaviours

[Sam Roberts]

I'll check that out, thanks.

Right now I'm doing something like:

function describeFruit(type) {
describe("fruit of "+type.name, function() {
it("should be juicy", function() {
assert(type.juicy);
});});}

describeFruit("apple");

[Peter Rust]

Perhaps a little simpler than what you have above (though perhaps you want the additional layer, I'm not sure) is to put your tests in a loop, like:

var fruits = [{'name': 'apple', 'juicy': true}, {'name': 'orange', 'juicy': true}];

fruits.forEach(function(fruit) {

  describe(fruit.name, function() {

    it('should be juicy', function() {

      assert(fruit.juicy);

  });

});

I'll often use this pattern when I have a bunch of very similar tests -- often with arrays of inputs and expected outputs, like this:

var test_data = [

  [3, 4, 7],

  [7, 8, 15],

  [2, 1, 3]

];

describe('addition', function() {

  test_data.forEach(function(d) {

    it('should add ' + d[0] + ' + ' + d[1] + ' to equal ' + d[2], function() {

      assert.equal(d[0] + d[1], d[2]);

    });

  });

});

[José F. Romaniello]

+1 . I use this a lot

2013/5/17 Peter Rust <pe...@cornerstonenw.com>

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