Check response payload.

[dblock]

Description

We already specify a payload in some tests, but we don't check the values, only the schema.

  - synopsis: Get server info (pretty=false).
    path: /
    method: GET
    parameters:
      pretty: false
    response:
      status: 200
      payload:
        version:
          distribution: opensearchX
        tagline: 'The OpenSearch Project: https://opensearch.org/.'
        x: y

The above will fail as follows.

FAILED  Test root endpoint. (/Users/dblock/source/opensearch-project/opensearch-api-specification/dblock-opensearch-api-specification/tests/_core/info.yaml)
    FAILED  CHAPTERS 
        PASSED  Get server info. 
            PASSED  REQUEST BODY 
            PASSED  RESPONSE STATUS 
            PASSED  RESPONSE PAYLOAD BODY 
            PASSED  RESPONSE PAYLOAD SCHEMA 
        FAILED  Get server info (pretty=false). 
            PASSED  PARAMETERS 
                PASSED  pretty 
            PASSED  REQUEST BODY 
            PASSED  RESPONSE STATUS 
            FAILED  RESPONSE PAYLOAD BODY (expected version.distribution='opensearchX', got 'opensearch', expected tagline='The OpenSearch Project: https://opensearch.org/.', got 'The OpenSearch Project: https://opensearch.org/', missing x=y)
            PASSED  RESPONSE PAYLOAD SCHEMA 

Issues Resolved

Closes #330.

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[github-actions]

Changes Analysis

Commit SHA: 85abf39
Comparing To SHA: 2134bcf

API Changes

Summary

NO CHANGES

Report

The full API changes report is available at: https://github.com/opensearch-project/opensearch-api-specification/actions/runs/9587851175/artifacts/1618419161

API Coverage

	Before	After	Δ
Covered (%)	483 (47.31 %)	483 (47.31 %)	0 (0 %)
Uncovered (%)	538 (52.69 %)	538 (52.69 %)	0 (0 %)
Unknown	24	24	0

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 80.43%. Comparing base (2134bcf) to head (342e564).

❗ Current head 342e564 differs from pull request most recent head 04ff544

Please upload reports for the commit 04ff544 to get more accurate results.

Files	Patch %	Lines
tools/src/tester/ResultLogger.ts	0.00%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #347   +/-   ##
=======================================
  Coverage   80.42%   80.43%           
=======================================
  Files          46       46           
  Lines        1400     1416   +16     
  Branches      321      289   -32     
=======================================
+ Hits         1126     1139   +13     
- Misses        274      277    +3     

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[dblock]

@nhtruong @Xtansia this is ready for review