API/Unit Tests

Question 1

Servers

Answer 1

• ## local or cloud based

Question 2

server load handling

Answer 2

1. get a bigger server
2. get more servers
   2a. get a load balancer to distribute

Question 3

load balancer process distribution methods

Answer 3

1. random
2. series
3. fewest processes
   also redistributes load on a server fail

Question 4

databases

Answer 4

• many servers can communicate with it
• can be partitioned
• can be replicated

Question 5

database replication strats

Answer 5

1. single primary: original has read and write capabilities, sends updates to its replicas
2. multi primary: both original and replica has read/write capabilities and update one another

Question 6

REST API

Answer 6

Representational state transfer application programming interface

Question 7

REST requests

Answer 7

• URLS identify resources
• HTTP methods to perform operations
• HTTP headers to specify data format for resources that are returned
• HTTP status codes for success/failure (200 OK)

Question 8

HTTP Methods

Answer 8

• create: POST/PUT
• retrieve: GET
• update: PUT/PATCH
• delete: DELETE

Question 9

HTTP Headers

Answer 9

2 kinds: content-type and accept

Question 10

GET examples

Answer 10

GET /users
GET /users/2
GET /users/pages/1 (GET /users?page=1)
GET /users/gender/female (GET /users?gender=female&userid=2) * GET /users/age/18 (GET /users?age=18)
GET /users/2/name
GET /users/2/pets

Question 11

POST example

Answer 11

POST /users HTTP/1.1
Host: the-website.com
Accept: application/json
Content-Type: application/xml
Content-Length: 49

Question 12

PUT example

Answer 12

PUT /users/3 HTTP/1.1
Host: the-website.com
Content-Type: application/xml
Content-Length: 52

Question 13

DELETE example

Answer 13

DELETE /users/2 HTTP/1.1
Host: the-website.com

Question 14

PATCH example

Answer 14

PATCH /users/1 HTTP/1.1
Host: the-website.com
Content-Type: application/xml
Content-Length: 37

Question 15

test-driven-development

Answer 15

• software development planning with verification of results as the focus; no coding until we know how it will be tested
• other methods include behavior-driven-development: code until functionality is observed

Question 16

test case vs suite

Answer 16

• test case: single input with an expected output
• test suite: collection of test cases

Question 17

unit testing

Answer 17

• each js file is a module
• each function within a module is a unit
• pre and post conditions are important here

Question 18

integrated testing

Answer 18

test if all modules of your code interact together as intended

Question 19

system testing

Answer 19

~Dev white box tests~
1. function test; functional reqs are met
2. quality test; non-functional reqs
~Consumer black box tests~
3. acceptance test; customer verifies all reqs
4. installation test; testing in user env (the platform)

Question 20

good tests

Answer 20

• boundary/edge cases; min/max parameters for input values
• error/empty cases: 0, -1, an empty array, etc.
• test behaviors/functions in combination, not just as units

Question 21

Node’s assert module

assert.equal(actual, expected)
-value
assert.strictEqual(actual, expected)
-value + data type

Answer 21

• simple set of assertion tests to test invariants
• provides limited feedback on test fails
• 11 methods

Question 22

Use Mocha for automated testing

Answer 22

at the minimum, use console.log();