[3.0.0] Custom ResponseTemplateTransformer gets overwritten by default implementation

[alex-martel]

Proposal

In Wiremock 2.35 I have the following external file;

file.json

[
    {
        "id": "theID",
        "time": {{now offset='2 hours' format='epoch'}}
    }
]

with the following code;

        WireMockConfiguration config = new WireMockConfiguration().extensions(new ResponseTemplateTransformer(true))
                .port(9090).fileSource(new ClasspathFileSource("src/test/resources/jsonfiles/"));
        wireMockServer = new WireMockServer(config);

in 3.0 the code change to this;

        WireMockConfiguration config = new WireMockConfiguration();
        FileSource fs = new ClasspathFileSource("src/test/resources/jsonfiles/");
        config = config.port(9090).fileSource(fs)
                .extensions(new ResponseTemplateTransformer(TemplateEngine.defaultTemplateEngine(), true, fs,
                        Collections.emptyList()));
        wireMockServer = new WireMockServer(config);

in the json returned by wiremock, the {{now offset='2 hours' format='epoch'}} is not replaced thus leading to wrong json format + data. I must say I also find it odd api wise to pass the FileSource to both the config and the ResponseTemplateEngine.

Reproduction steps

have wiremock returning a classpathfilesource like the above and see the template not being replaced.

References

Relates to; wiremock/wiremock.org#157

[alex-martel]

A bit more notes, the "config" object above does contain the right true value for global, but when adding a breakpoint in
ResponseTemplateTransformer::applyGlobally the value is false

[achimgrimm]

Hi @manofthepeace,
not sure if it helps with your problem, but if you only want to activate the global templating, then you can use an option now to do that.

        FileSource fs = new ClasspathFileSource("src/test/resources/jsonfiles/");
        WireMockConfiguration config = new WireMockConfiguration().port(9090)
                                                                  .fileSource(fs)
                                                                  .globalTemplating(true);
        wireMockServer = new WireMockServer(config);

[achimgrimm]

I also added wiremock/wiremock.org#164 to update the documentation.

[tomakehurst]

This is a documentation issue - being addressed shortly.

Local templating is enabled by default in WireMock 3+ (you can disable it with wireMockConfig().templatingEnabled(false)) and per @achimgrimm's comment above you can set it global with .globalTemplating().

This will do all the heavy lifting regarding construction of the transformer.

[alex-martel]

I still do not believe this is a only doc issue. globalTempating is one thing, but please see; #2350 (comment)

[tomakehurst]

I've pushed a further doc fix that should address your other concern:
https://wiremock.org/docs/response-templating/#customising-and-extending-the-template-engine