Rapid Data Modeling and Testing with FakeIt

Rapid Data Modeling and Testing

AARON BENTON

bit.ly/cbcommunity

+

OUR CAPABILITIES

6

Enthusiasm Disillusionment Panic

Search for the Guilty

Punishment of the Innocent

Praise for Non-Participants

First, solve the problem. Then, write the code.“ ”John Johnson

Data Modeling

Phases• Conceptual • Logical • Physical

Conceptual Data Modeling

Entity NamesEntity Relationships

Users Products

Line Items

Orders

N 1Person Birthplace Location Person Location

Born In

Birthplace of

Person Location(1, 1) Born In

Birthplace of (0, N)

<< Entity >> Person

0. .N

1

<< Entity >> Location

<< Relationship >>Born in >

< Birthplace of

Chen

Person LocationIDEF1x

Person LocationBorn In

Birthplace of

Bachman

Crow's Foot

ISO

UML

Logical Data Modeling

Entity NamesEntity AttributesEntity Relationships

UsersUser ID (PK)

Username

Password

First Name

Last Name

Address

City

State

Zip Code

Country

Email

Phone

OrdersOrder ID (PK)

Order Number

User ID (FK)

Order Date

Address

City

State

Zip Code

Country

Phone

Email

Credit Card

Expiration Date

Order Line ItemsOrder ID (FK)

Product ID (FK)

Quantity

Total

ProductsProduct ID (PK)

Product Name

Description

Price

Physical Data ModelingEntity Names -> Table NamesEntity Attributes -> Field NamesEntity Relationships -> Keys Data Types

NoSql Modeling• How do you represent a model? • What tools do you use? • How do you show relationships? • Does code define the model? • What key patterns should be used?

JSON

JSON Schema

YAML

Now What?

20

Fake Data Generators• FakerJS • ChanceJS • json-generator.com • objgen.com/json • mockaroo.com • jsonschema.net

Relationships are Hard

FakeIT

Fakeit• CLI Tool inspired by Swagger • Models defined in YAML • Generates JSON, CSON, YAML, CSV • Exports to Couchbase, Sync Gateway, Zip,

Console

Fakeit Data• Exposes FakerJS and ChanceJS • Custom Build Functions w/ Pre and Post • Multiple Models • Dependencies • Definitions

*fakeit is for structure, cbworkloadgen is for sizing

npm install fakeit -g

Original YAML Model

Simple Model

30

Data Attribute

Console Output

File Output

Output Formats

CSV Output

Zip Archive

. . . ?

Couchbase

What about Mobile…?

Sync Gateway

Sync Gateway with Auth

How does it Work?

Property Data:

value

• A static value to be used • Executed at build time

fake

• A FakerJS template string • Executed at build time

pre_build

• Function body used to initialize a property

• Property is set to the returned value

build

• Function body used to set a property

• Property is set to the returned value

post_build

• Function body used to manipulate a property after it has been set

• Property is set to the returned value

pre_run

• Function body that is executed before any models are generated

post_run

• Function body that is executed before after all models have been generated

FlowModel

Pre_RUNModel

PRE_BUILD

Initialize Property

Value (EACH)

Start Document

Run

Property PRE_BUILD +

BUILD (EACH)

PROPERTY POST_BUILD

(EACH)

MODEL POST_BUILD

MODEL POST_RUN

Flow

Flow

Multiple Models

Multiple Models

Dependencies

Users Products Reviews Orders

Dependencies

Dependencies

Definitions

Definitions

continents.json countries.csv

Input

continents.json countries.csv

Input

How we use FakeIt• YAML models store in the repository • Make commands to generate data • Docker Compose:

• Nginx • Couchbase • Sync Gateway

• Testing / QA

Demos

Fakeit Examples• Contacts • Ecommerce • Flat • Flight Data • Music • Simple • Social

github.com/bentonam/fakeit-examples

Questions?

HOW TO CONTACT MEDon’t hesitate to contact with me. I will be happy to answer your questions.

TWITTER: @bentonam

github.com/bentonam

EMAIL: aaron@shop.com

THANK YOU