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Support array responses

See original GitHub issue

A response example

[
    {
        "product_id": "efbbbf00-0000-0000-0000-000000000000",
        "description": "Incredibly fantastic product",
        "name": "Fantastic product"
    }
]

A content test

---
version: 1
tests:
  contentTests:
    - openApiOperationId: getProducts
        responseBodyTests:
          - key: "[]" # << Suggested notation, could be a dot or wathever else 
            minLength: 1
          - key: "[0].name"
            value: "Fantastic product"

Generated script

// Set response object as internal variable
let jsonData = {};
try {jsonData = pm.response.json();}catch(e){}

// Response body should have property "[]"
pm.test("[GET]::/products - Content check if property '[]' exists", function() {
   pm.expect((typeof jsonData.[] !== "undefined")).to.be.true;
// ---------------------------^ SYNTAX ERROR
});

// Response body should have a minimum length of "1" for "[]"
if (jsonData?.[]) {
// ----------^ SYNTAX ERROR
pm.test("[GET]::/products - Content check if value of '[]' has a minimum length of '1'", function() {
  pm.expect(jsonData.[].length).is.at.least(1);
// -------------------^ SYNTAX ERROR
})};

// Response body should have property "[0].name"
pm.test("[GET]::/products - Content check if property '[0].name' exists", function() {
   pm.expect((typeof jsonData.[0].name !== "undefined")).to.be.true;
// ---------------------------^ SYNTAX ERROR (see #333 )
});

// Response body should have value "Fantastic product" for "[0].name"
if (jsonData?.[0].name) {
pm.test("[GET]::/products - Content check if value for '[0].name' matches 'Fantastic product'", function() {
  pm.expect(jsonData.[0].name).to.eql("Fantastic product");
// -------------------^ SYNTAX ERROR (see #333 )
})};

Expected script

// Set response object as internal variable
let jsonData = {};
try {jsonData = pm.response.json();}catch(e){}

// Response body should be an array
pm.test("[GET]::/products - Content check if response is an array", function() {
   pm.expect(jsonData).to.be.an('array');
});

// Response body should have a minimum length of "1"
pm.test("[GET]::/products - Content check if value has a minimum length of '1'", function() {
  pm.expect(jsonData.length).is.at.least(1);
});

// Response body should have property "[0].name"
pm.test("[GET]::/products - Content check if property '[0].name' exists", function() {
   pm.expect((typeof jsonData[0].name !== "undefined")).to.be.true;
});

// Response body should have value "Fantastic product" for "[0].name"
if (jsonData?.[0].name) {
pm.test("[GET]::/products - Content check if value for '[0].name' matches 'Fantastic product'", function() {
  pm.expect(jsonData[0].name).to.eql("Fantastic product");
})};

Tested version: v1.16.1