Testing
Mocha
> npm i mocha -g
> mocha
test folder
Chai
> npm i chai --save-dev
Assert
vs
Should
vs
Expect
Assert
var assert = require('chai').assert
, foo = 'bar'
, beverages = { tea: [ 'chai', 'matcha', 'oolong' ] };
assert.typeOf(foo, 'string'); // without optional message
assert.typeOf(foo, 'string', 'foo is a string'); // with optional message
assert.equal(foo, 'bar', 'foo equal `bar`');
assert.lengthOf(foo, 3, 'foo`s value has a length of 3');
assert.lengthOf(beverages.tea, 3, 'beverages has 3 types of tea');
Expect
var expect = require('chai').expect
, foo = 'bar'
, beverages = { tea: [ 'chai', 'matcha', 'oolong' ] };
expect(foo).to.be.a('string');
expect(foo).to.equal('bar');
expect(foo).to.have.lengthOf(3);
expect(beverages).to.have.property('tea').with.lengthOf(3);
Should
var should = require('chai').should() //actually call the function
, foo = 'bar'
, beverages = { tea: [ 'chai', 'matcha', 'oolong' ] };
foo.should.be.a('string');
foo.should.equal('bar');
foo.should.have.lengthOf(3);
beverages.should.have.property('tea').with.lengthOf(3);
Assert, Expect
interfaces do not modify Object.prototype
Should
interface modifies Object.prototype
The assert and expect interfaces support custom messages just about everywhere. For instance:
The message "foo should be true" will be output together with the failed assertion if the assertion fails. You don't get the opportunity to set a custom message with the should interface.
assert.isTrue(foo, "foo should be true");
expect(foo, "foo should be true").to.be.true;
Nock
> npm i nock -D
SUT
System Under Test
Dependency
(collaborator)
Dependency
(collaborator)
Dependency
(collaborator)
Under construction
Module
SUT
Istanbul
> npm i istanbul -g
> istanbul cover _mocha
> istanbul cover node_modules/mocha/bin/_mocha -- -R spec
Supertest
> npm i supertest
Testing
By Shuhratbek Mamadaliyev
Testing
- 1,007