Postman: Check date equals yesterdays date - testing

Question

I'm running a GET request using Postman and the JSON response is below:
{
"Version": "1.0.524.0",
"BuildName": "Live",
"BuildDate": "04/12/2018 18:58:50.85 \r\n"
}
The build date increments by one each day and I want to write a script to check the date has been incremented and if it hasn't then its a failed test.
Currently I have this:
pm.test("Check Build Date", function (CheckDate) {
pm.expect(pm.response.text()).to.include("04/12/2018 18:58:50.85");
});
However I know if I run this script tomorrow it won't work and I will get the following error:
FAIL Check Build Date | AssertionError: expected '{"Version":"1.0.524.0","BuildName":"Live","BuildDate":"05/12/2018 18:58:50.85 \\r\\n"}' to include '04/12/2018 18:58:50.85'
Can anybody assist, please?

Answer 1

If your response body is an object, like in your question, you can use pm.response.json().BuildDate and check that it equals that value.
pm.test("Check Build Date", () => {
pm.expect(pm.response.json().BuildDate).to.equal("04/12/2018 18:58:50.85 \r\n");
});
Not sure why you have those \r\n values in string on that response, they seem in the wrong place to me.
To know that the day has incremented by 1, you would need to store the state of the last run and do a check against that. You could be that with setting it as an environment variable.
Send an initial request to get and set the BuildDate. You will now have that value to use in a Check request.
pm.environemnt.set('lastBuildDate', pm.response.json().BuildDate)
In the check request, you could have something like this:
const moment = require('moment')
let dateDiff = moment(pm.reponse.json().BuildDate).isAfter(pm.environment.get('lastBuildDate'))
pm.test("Check Build Date", () => {
pm.expect(dateDiff).to.be.true
})
If you just want something that checks if the BuildDate is the after the time that that you are making the request - You could use something like this:
const moment = require('moment')
let dateNow = moment().format("DD/MM/YYYY hh:mm:ss.SS")
let dateDiff = moment(pm.response.json().BuildDate).isAfter(dateNow)
pm.test("Check Build Date", () => {
pm.expect(dateDiff).to.be.true
})
This is obviously not what you want to do but I would suggest taking a look at the momentjs module as see if that is something in there that you can use for your use case.