aws-lambda-go-test

A package that allows to run integration test against lambda function locally

Installing

go mod edit -require github.com/yogeshlonkar/aws-lambda-go-test@latest

or

go get -u github.com/yogeshlonkar/aws-lambda-go-test

Example usage

import (
 alt "github.com/yogeshlonkar/aws-lambda-go-test/local"
)

response, err := alt.Run(alt.Input{
    Payload: "payload",
})
if respose != expected {
  // do fail
}

Input parameters

Parameter	type	Default value	Description
TimeOut	time.Duration	5 seconds	for which connection will tried to be made otherwise lambda will be started by this library
Port	int	random if not provided	port where lambda is or will be started on
AbsLambdaPath	string	main.go relative to test	Absolute path the lambda go file
Payload	interface{}	-	Any structure that can be encoded by the encoding/json package
ClientContext	*lc.ClientContext	-
Deadline	*messages.InvokeRequest_Timestamp	-

Run function will set default values and check if the lambda is running or not if not running it will start the lambda and perform RPC API call

Util

util.Response can be used to incrementally test the response returned by lambda. This way the unmarshall is delayed and expected null field un-marshalling can be avoided

import (
  altu "github.com/yogeshlonkar/aws-lambda-go-test/util"
)

response := altu.ParseResponse(responseTxt)

if response.StatusCode != 200 {
  t.Errorf("response.StatusCode=%d, want 200", response.StatusCode)
}

actualHeaders := TestHeaderStruct{} // expected header struct
response.PaseHeaders(&actualHeaders)
if actualHeaders.ContentType == "application/json" {
	t.Errorf("actualHeaders.ContentType=%s, wanted application/json", actualHeaders.ContentType)
}

actualBody := TestBody{} // expected body struct
response.PaseBody(&actualBody)
if len(actualBody.SomeArr) != 1 {
	t.Errorf("len(actualBody.SomeArr)=%d, wanted 1", len(actualBody.SomeArr))
}

Check response_test.go for use of util package