An overview about testing and Jasmine

igorlima

Jan 23rd, 2014

• Test First
  
• TDD
• Jasmine
• describe
• it
• expect
• matcher
• jasmine-node
• Plunker
  
• A challenge

JavaScript beginner

or any other level

if you know already how to code a simple line using JavaScript,

feel free to join...

Each time you start writing a new class, 

a new module,

or just a new piece of logic,

ask yourself:  How can I test this?

The answer to this question will help you to code much more efficiently, create better APIs, and put everything into nicely separated blocks.

You can't write tests for spaghetti code.

A framework for testing JavaScript code

describe("A suite", function() {
  it("contains spec with an expectation", function() {
    expect(true).toBe(true);
  });
}); 

A test suite that contains one or more specs. 

It might also have other test suites.

A spec that contains one or more expectations.

It's located between the actual and the expected value.

Examples:

• toEqual

• toBe

• toMatch

• toBeDefined

• toBeUndefined

• toBeNull

• toBeTruthy

• toBeFalsy

• toContain

• toBeLessThan

• toBeGreaterThan

• toThrow 

Any matcher can evaluate to a negative assertion by chaining the call to expect with a not before calling the matcher.

A NodeJS module that makes the wonderful Jasmine framework available in NodeJS.

$ npm install jasmine-node -g

It's based from  the jasmine documentation.

Keep the documentation in mind.

Any question?

Please go there first.

describe("A suite", function() {
  it("contains spec with an expectation", function() {
    expect(true).toBe(true);
  });
}); 

$ jasmine-node my-code.spec.js --color --autotest --watch ./

jasmine-node should be running...

jasmine-node should be running...

describe("My new object", function() {

  var MyObject = require('./my-code.js').MyObject;

  it("should have a property named 'foo'", function() {
    expect(MyObject.foo).toBeDefined();
  });

}); 

test should FAIL

jasmine-node should be running...

exports.MyObject = {
  foo: {}
}; 

test should PASS

An online community for

creating,

collaborating on

and sharing

your web development ideas.

It's amazing!!!

Love it!!!!

Go to:

http://plnkr.co/Nx6wpmxgDX4FGDnbVsQh

There is no excuse.

You can develop your idea online and on real time, keeping in mind doing the test first.

Isn't it amazing? I know it is!!!

Keep in mind "Test First".

Using Jasmine is a way to do that.

Just keep it in mind.

go futher with the reference links

Official site - pivotal.github.io/jasmine

Jasmine-node - github.com/mhevery/jasmine-node

Plunker - plnkr.co

"My Calculator"

  "sum 2 + 2 SHOULD be 4"
  "sum 2 + 2 + 3 + 1 SHOULD be 8"

  "subtraction between 2 and 2 SHOULD be 0"
  "subtraction between 3 and 4 SHOULD be -1"

  "multiplication between 3 and 2 SHOULD be 6"
  "multiplication between 3, 2 and 4 SHOULD be 24"

  "division between 2 and 2 SHOULD be 1"
  "division between 6 and 2 SHOULD be 3" 

That's it

Thanks for your time.

Hope it might be helpful for you all.

Thanks again!!!