Feature/coupon type

[kidunot89]

Your checklist for this pull request

Thanks for sending a pull request! Please make sure you click the link above to view the contribution guidelines, then fill out the blanks below.

🚨Please review the guidelines for contributing to this repository.

• Make sure you are making a pull request against the develop branch (left side). Also you should start your branch off our develop.
• Make sure you are requesting to pull request from a topic/feature/bugfix branch (right side). Don't pull request from your master!

What does this implement/fix? Explain your changes.

• Codeception tests for Coupon type
• Coupon type & connections
• WooCommerce post-types & taxonomies registered to GraphQL schema

Example Query

// the "coupon" query accepts a relay global id

coupon( id: "some relay id" ) {
    couponId
    code
    amount
    date
    modified
    discountType
    description
    dateExpiry
    usageCount
    individualUse
    usageLimit
    usageLimitPerUser
    limitUsageToXItems
    freeShipping
    excludeSaleItems
    minimumAmount
    maximumAmount
    emailRestrictions
}

// the "couponBy" query accepts "couponId" and "code"

couponBy( couponId: "some coupon id" ) {
    ...
}

// the "coupons" query accepts the standard connection params like "first" and "where"
// "code" is the only where param right now but more will be added

coupons( first: 5, where: { code: "some coupon code" } ) {
    nodes {
        ...
    }
}

There are five more five connections to the Coupon that have been created yet due to the types or fields required having not been created yet. There are

• products - Product
• excludedProducts - Product
• productCategories - Category
• excludedProductCategories - Category
• usedBy - User
  These also cause the CouponQueriesTest to fail as well.

Does this close any currently open issues?

…

Any relevant logs, error output, GraphiQL screenshots, etc?

(If it’s long, please paste to https://ghostbin.com/ and insert the link here.)

Any other comments?

…

Where has this been tested?

Operating System: Ubuntu 18.04

WordPress Version: 5.1