I have some duplicate code I want to refactor and store in a postman collection variable. This function code is only duplicated once in my postman unit tests but I don’t want even one duplication. So, I’m trying to store it in a collection variable and execute it however many times I need it.

As an arrow-function it works perfectly.

const parseMillisecondsIntoReadableTime = milliseconds => {
    // From the milliseconds parm, this function calculates 
    // hours (h), minutes (m) and seconds (s) and returns a string like:  "0h 29m 59s".
    return parseInt(h) + 'h ' + parseInt(m) + 'm ' + parseInt(s) + 's';
};

Sample usage that works:

const timeToExpire = parseMillisecondsIntoReadableTime(pm.collectionVariables.get('access_token_expiry') - new Date());        

Now I want to store this function in a postman collection variable.

Object.prototype.parseMillisecondsIntoReadableTime = function(milliseconds) {
    // same code as above
    // From milliseconds parm, this calculates 
    // hours (h), minutes (m) and seconds (s) and returns this string.
    return parseInt(h) + 'h ' + parseInt(m) + 'm ' + parseInt(s) + 's';
};

It works on one request but for all the rest, I get this Postman test failure message:

Response schema validation successful | Error: schema is invalid: data.properties['metadata'].properties['parseMillisecondsIntoReadableTime'] should be object,boolean.

The response object does have a schema with data and metadata properties. How it is involved in this error is perlexing.

I let PostBot fix the test and got this

pm.test("Response schema validation successful", () => {
    const successSchema = JSON.parse(pm.collectionVariables.get("successSchema"));

    console.log("200 successful post-request TEST script"); 
    console.log(successSchema);

    successSchema.properties['metadata'].properties['parseMillisecondsIntoReadableTime'] = { type: ['object', 'boolean'] };
pm.expect(require("ajv")().validate(successSchema, responseData)).to.be.true;

});

I still get the error. This is the successSchema layout.

const successSchema = {
    type: "object",
    properties: {
        metadata: {
            type: "object",
            properties: {
                status: { type: "string" }
            },
            required: ["status"]
        },
        data: {
            type: "object",
            properties: {
                brandName: { type: "string" },
                goodsSupplierNumber: { type: "string" },
                supplierNumber: { type: "string" }
            },
            required: ["brandName", "goodsSupplierNumber", "supplierNumber"]
        },
        errors: {
            type: "array",
            items: {
                type: "object",
                properties: {
                    code: { type: "string" },
                    message: { type: "string" }
                },
                required: ["code", "message"]
            }
        }
    },
    required: ["metadata", "data", "errors"]
};
pm.collectionVariables.set("successSchema", JSON.stringify(successSchema));