Fix error when allOf two refs

[xvladqt]

Description

Add x-examples resolver for json-schema-merge-allof

Motivation and Context

Generate throw error:

WARNING: failed to create example from schema object: Error: No resolver found for key x-examples. You can provide a resolver for this keyword in the options, or provide a default resolver.
[ERROR] Error: No resolver found for key x-examples. You can provide a resolver for this keyword in the options, or provide a default resolver.

in this case

Test:
  description: Test
  allOf:
    - $ref: '#/components/schemas/TestA'
    - $ref: '#/components/schemas/TestB'
  x-examples:
    Example:
      value:
        test1: false
        test2: false

TestA:
  type: object
  description: testA
  properties:
    test1:
      type: boolean
      example: false
  required:
    - test1
  x-examples:
    Example:
      value:
        test1: true

TestB:
  type: object
  description: TestB
  properties:
    test2:
      type: boolean
      example: false
  required:
    - test2
  x-examples:
    Example:
      value:
        test2: true

How Has This Been Tested?

1. yarn test - success
2. Generate for my specification, which throw error before that

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes if appropriate.
• All new and existing tests passed.

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[sserrata]

Thanks for the contribution @xvladqt. Does it make sense to also add support for x-example (singular)? Perhaps not single x-example could only be a single example?

[xvladqt]

@sserrata if x-example without allOf all good, this problem exists only if allOf with 2+ refs and x-example. If I understand the question correctly.

[sserrata]

@sserrata if x-example without allOf all good, this problem exists only if allOf with 2+ refs and x-example. If I understand the question correctly.

Thanks @xvladqt that makes sense.

[sserrata]

Fix linter errors. You may try running yarn run format. If that doesn't work, try running the format script manually, i.e. prettier . --check --ignore-unknown --ignore-path .prettierignore.

I know that sometimes the globally installed prettier can interfere so you might need to specify you want to run the prettier installed locally, e.g. ./node_modules/.bin/prettier.

[xvladqt]

@sserrata I forget about prettier, fixed it now

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