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kotlinlang

```
@Test fun sendAcceptAndContentTypeHeaders() {
        enqueueMockResponse()

        searchNearbyPlacesSubject.onNext(listOf())

        assertThatRequestContainsHeader("Accept", "application/json")
    }
```
where `enqueueMockResponse()` is
```
protected void enqueueMockResponse(int code, String fileName) throws IOException {
    MockResponse mockResponse = new MockResponse();
    String fileContent = getContentFromFile(fileName);
    mockResponse.setResponseCode(code);
    mockResponse.setBody(fileContent);
    server.enqueue(mockResponse);
  }
```
But I need to trigger the event with a Subject (because I’m using RxJava)