Spring-boot: TestRestTemplate does not resolve relative links with java.net.URI parameter

[shollander]

According to the documentation, when using @SpringBootTest(webEnvironment=WebEnvironment.RANDOM_PORT) TestRestTemplate will resolve relative links to the running server.

This works when calling TestRestTemplate with a String parameter for the uri. When using the methods that take a java.net.URI I get org.apache.http.ProtocolException: Target host is not specified

[philwebb]

We use Spring's UriTemplateHandler so unfortunately I don't think there's an easy way to expand links that are passed in as URIs. Are you using URIs for any specific reason? Anything preventing you switching to the String version?

[shollander]

In my case I am using URIs because of cleaner construction (using UriComponentsBuilder). I have an easy workaround by calling uri.toString() so it's not a major issue for me. It just seems to be strange behavior from an API perspective. If it can't be fixed it should at least be documented somewhere.

[philwebb]

@shollander Yeah, totally agree. Thanks.

[anderius]

I have the same issue. I want to use TestRestTemplateto send a POST with some headers, and have to use RequestEntity, which only accepts URI.

Should RequestEntityhave methods that accepts String, or should TestRestTemplateperhaps accept headers etc?

UPDATE: I found a way to do it, it should probably still be better documented:

MultiValueMap<String, String> form = new LinkedMultiValueMap<>();
form.set(...);

HttpHeaders headers = new HttpHeaders();
headers.add(...);

HttpEntity<MultiValueMap<String, String>> httpEntity = new HttpEntity<>(form, headers);

ResponseEntity<String> resoinse= template.exchange("/path", POST, httpEntity, String.class);

[philwebb]

Nice, thanks @wilkinsona