checker

checker is a checkout service that will support different promotions with the given inventory

Prerequisite

• Go min version >= 1.17

Product

SKU	Name	Price	Inventory Qty
120P90	Google Home	$49.99	10
43N23P	Macbook Pro	$5399.99	5
A304SD	Alexa Speaker	$109.50	10
234234	Raspberry Pi B	$30	2

Note

• Each sale of a MacBook Pro comes with a free Raspberry Pi B

• Buy 3 Google Homes for the price of 2

• Buying more than 3 Alexa Speakers will have a 10% discount on all Alexa speakers

Graphql Schema

To find graphql schema, please check

/graph/schema.graphqls

There are 2 main mutations

scanItems

• scanItems is a mutation to insert items to cart

type Mutation {
  scanItems(input: ScanItems!): ScanItemsResult!
}

• Example Request

mutation {
  scanItems(input: {
    items: [
      {
        sku: "120P90",
        quantity: 5,
      },
    ]
  }) {
    message
  }
}

checkout

• checkout is a mutation to finish checkout cart items

type Mutation {
  checkout: CheckoutResult!
}

• Example Request

mutation{
  checkout() {
   totalPrice
    message
    items {
      sku
      name
      price
      discountedPrice
      quantity
      freeQuantity
    }
  }
}

How To Run

Dev

• Please Run

make dev

• Open graphql playground in browser

http://localhost:8080/

Prod

Please run

make build // to build checker binary
make start // to start checker binary

• Open graphql playground in browser

http://localhost:8080/

Unit Test

To run unit test, please run

make unittest