tests: add iqdb queries controller tests.

test/helpers/iqdb_test_helper.rb

@@ -16,5 +16,16 @@ module IqdbTestHelper
 
     service = mock_sqs_service.new
     Post.stubs(:iqdb_sqs_service).returns(service)
+
+    Danbooru.config.stubs(:iqdbs_auth_key).returns("hunter2")
+    Danbooru.config.stubs(:iqdbs_server).returns("http://localhost:3004")
+  end
+
+  def mock_iqdb_matches!(post_or_source, matches)
+    source = post_or_source.is_a?(Post) ? post_or_source.complete_preview_file_url : post_or_source
+    url = "http://localhost:3004/similar?key=hunter2&url=#{CGI.escape source}&ref"
+    body = matches.map { |post| { post_id: post.id } }.to_json
+
+    FakeWeb.register_uri(:get, url, body: body)
   end
 end