Parameterize Assertion HTTP Header Values in Script Assertion?

[richie]

Hey!

Ok - I queried the forum to find posts about asserting the values on HTTP headers using script assertions and found yet more code @nmrao had put together to assert on custom header values

//all Rao's work

def expectedHTTPResponse = ['HTTP/1.1 200 OK']
def headers = messageExchange.response.responseHeaders
def actualHTTPResponse = headers['#status#']
assert expectedHTTPResponse == actualHTTPResponse

I am trying to assert a couple of custom headers have the appropriate values - but I want to parameterize the values if possible.

I have a GET request with the following URI:

/api/1/{namespace}/{dataset}?_format=csv

I have a Content-Disposition header with the following expected value

attachment; {namespace}_{dataset}.csv

So for my request

GET --> /api/1/authorised-establishments/sector?_format=csv

I'm expecting the Content-Disposition header will display

attachment; authorised-establishments_sector.csv

I am trying to use the script assertion Rao put together to parameterize the header value - but it's not working

I tried the following:

def expectedHTTPResponse = ['attachment; filename='${REST Request#namespace}'_'${REST Request#dataset}'.csv']
def headers = messageExchange.response.responseHeaders
def actualHTTPResponse = headers['Content-Disposition']
assert expectedHTTPResponse == actualHTTPResponse

and I also tried several variations using the 'context.expand' as follows:

def expectedHTTPResponse = ['attachment; filename=context.expand( '${REST Request#namespace}' )_context.expand( '${REST Request#dataset}' ).csv']
def headers = messageExchange.response.responseHeaders
def actualHTTPResponse = headers['Content-Disposition']
assert expectedHTTPResponse == actualHTTPResponse

Would anyone be able to point me in the right direction as to how I can successfully parameterize this script assertion?

I think I can see why its not working - but I don't know how to fix it.

Thanks to all!

richie 🙂

[nmrao · Accepted solution]

@richie,
What does below shows if you add at the start of the script?

def ns = context.expand('${REST Request#namespace}')
def ds = context.expand('${REST Request#dataset}')
def value = "attachment; ${ns}_${ds}.csv" as String
log.info value

[richie]

Hey @nmrao 

so I updated the script assertion as follows:

def ns = context.expand('${REST Request#namespace}')
def ds = context.expand('${REST Request#dataset}')
def value = "attachment; filename=${ns}_${ds}.csv" as String
log.info value

//def expectedHTTPResponse = ['attachment; filename=context.expand( '${REST Request#namespace}' )_context.expand( '${REST Request#dataset}' ).csv']
//def headers = messageExchange.response.responseHeaders
//def actualHTTPResponse = headers['Content-Disposition']
//assert expectedHTTPResponse == actualHTTPResponse

and it generated the following:

Thu Feb 21 11:17:37 GMT 2019: INFO: attachment; filename=certification-nomenclature_certificates.csv

so I thought about your code and tried the following:

def ns = context.expand('${REST Request#namespace}')
def ds = context.expand('${REST Request#dataset}')
//def value = "attachment; filename=${ns}_${ds}.csv" as String
//log.info value

def expectedHTTPResponse = "attachment; filename=${ns}_${ds}.csv" as String
def headers = messageExchange.response.responseHeaders
def actualHTTPResponse = headers['Content-Disposition']
assert expectedHTTPResponse == actualHTTPResponse

and got the result

assert expectedHTTPResponse == actualHTTPResponse | | | | | [attachment; filename=certification-nomenclature_certificates.csv] | false attachment; filename=certification-nomenclature_certificates.cs

so I removed the 'as String' and wrapped the value in square brackets as 

def ns = context.expand('${REST Request#namespace}')
def ds = context.expand('${REST Request#dataset}')

def expectedHTTPResponse = ["attachment; filename=${ns}_${ds}.csv"]
def headers = messageExchange.response.responseHeaders
def actualHTTPResponse = headers['Content-Disposition']
assert expectedHTTPResponse == actualHTTPResponse

and it worked! YAY! 

thanks a lot man - that was doing my head in.

For my education - can you clarify why I have to declare those variables (ns and ds) rather than use the original script?

Again - thanks so much - you're saving my life here!

richie

\zz\

[nmrao]

That was just to see what that statements were throwing.

When something does not work, use log.info for that piece of code. So that, we know where to focus on.