Jasmine TDD

#Directory structure and initialization

In the project root directory, run

jasmine init

This creates two directories and a file:

spec/support/jasmine.json

Next, create two files:

touch spec/spec.js
touch app.js

The directory should now look like:

spec/support/jasmine.json
spec/spec.js
app.js

#app.js app.js is an object of keys and methods. The name of the object is module.exports.

module.exports = {
  helloWorld: function() {
    console.log("Connected!");
    return "Hello world.";
  },
  addOne: function(num) {
    return num + 1;
  },
  upperCASE: function(arr) {
    var hold = [];
    for (var i = 0; i < arr.length; i++) {
        hold.push(arr[i].toUpperCase());
    }
    return hold;
  }
};

The line console.log("Connected!"); will indicate whether spec.js and app.js are hooked up.

#spec.js In spec.js:

var app = require('./../app.js');

describe('Test helloWorld', function() {
  it('Hello world test', function() {
    expect(app.helloWorld())
    .toEqual("Hello world.");
  });
});

describe('Test addOne', function() {
  it('Adds one to a number', function() {
    expect(app.addOne(1))
    .toEqual(2);
  });
});

var colors = ['red', 'green', 'blue'];

describe('Test upperCASE', function() {
  it('Make uppercase', function() {
    expect(app.upperCASE(colors))
    .toEqual(['RED', 'GREEN', 'BLUE']);
  });
});

You can write the test on one line:

    expect(app.nameOfTest(inputData)).toEqual(outputData);

However, the nested parentheses can be confusing! Breaking this into two lines makes the parentheses more clear. If you get the error message "undefined is not a function" on this line, then you may have a parentheses nesting problem.

xit comments out the test. Remove the x to run the test.

#Run jasmine Run the tests from the root directory with the command

jasmine