CODEWITHSUNDEEP
javaspring
SSF
SSF

Reputation: 983

How to use a RestTemplate xml file in MockClientHttpRequest/Response

I am trying to stub a response that is coming back from a web server to my application, in order to be able to carry out component tests on my application. I have a RestTemplate XML that I would like my requestFactory to consume to create responses based on the XML. Example of the XML is below. 

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<rates-file xmlns="http://www.example.com/schema/rates-file">
    <timestamp>2017-06-30T14:20:21.768+10:00</timestamp>
    <daily-rates-updated>true</daily-rates-updated>
    <number-of-records>96</number-of-records>
    <rate>
        <transaction-type>transaction</transaction-type>
        <product-code>product</product-code>
        <code>code</code>
        <description>description</description>
        <rate>2.6154</rate>
    </rate>

    <number-of-records>96</number-of-records>
    <rate>
        <transaction-type>transaction2</transaction-type>
        <product-code>product2</product-code>
        <code>code2</code>
        <description>description2</description>
        <rate>2.6154</rate>
    </rate>
  ...

For this purpose I am using MockClientHttpRequest and MockClientHttpResponse (part of spring-test). How do I have the MockClientHttpRequest consume this XML and consequently produce my responses?

EDIT: Just to clarify this is the part of code I am trying to direct to my XML:

public RatesFile fetchRatesFile() {
...
try {
...
    **ratesFile = restTemplate.postForObject(exampleUrl, variables, RatesFile.class);**
...
}

return ratesFile;

}

Instead of overriding postForObject method, I would like to write a RequestFactory that responds to the HttpMethod.POST request by using the XML.

Upvotes: 1

Views: 488

Answers (1)

Abhijit Sarkar
Abhijit Sarkar

Reputation: 24593

I'd not mess with the RestTemplate, simply due to the fact that I'd not be testing the Prod code in that case. What I'd do is override exampleUrl in my test, and then stand up an endpoint that responds to that. Here's how:

  1. If using Spring Boot, simply use the properties attribute on @SpringBootTest to set exampleUrl=http://localhost:8080/test. Also throw in @DirtiesContext in that case. Otherwise, create an application.properties in the src/test/resources directory and put the property in that.
  2. Now either you can create a @RestController in the test package that has a method mapped to /test, OR
  3. Use a mock Web server that you can configure to return canned response. The 2 most popular ones are WireMock and MockServer

Using either #2 or #3, you receive the HTTP request and can return whatever response you want to based on that.

Upvotes: 2

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