api-test with tests

test.json

{
  "testCases": {
    "get_api": {
      "path": "/books",
      "query": {
        "id": "1"
      },
      "expect": {
        "body": {
          "contains": {
            "author": "Aneeta Sharma"
          },
          "hasKey": ["id", "author", "title"]
        },
        "header": {
          "contains": {
            "http_status": "200"
          }
        }
      }
    },
    "invalid_post_api": {
      "path": "/books",
      "method": "POST",
      "body": {
        "id": "1",
        "author": "Robin Wieruch",
        "title": "The Road to React"
      },
      "expect": {
        "body": {
          "eq": { "message": "Book already exists." }
        }
      }
    }
  },
  "url": "localhost:3000",
  "header": {
    "Content-Type": "application/javascript"
  }
}