@Test
public void headersShouldBeSameWithThatOfHttpContent() {

	// Given
	httpContent.addHeader("hello", "world");
	httpContent.addHeader("volley", "extensions");
	// When
	Request<String> request = new VolleyerRequest<String>(httpContent, clazz, responseParser, listener, errorListener);
	// Then
	try {
		assertEquals(httpContent.getHeaders(), request.getHeaders());
	} catch (AuthFailureError e) {
		e.printStackTrace();
	}
}