iqdb: switch to Danbooru::Http.

test/test_helpers/iqdb_test_helper.rb

@@ -21,11 +21,9 @@ module IqdbTestHelper
     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.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
-
-    stub_request(:get, url).to_return(body: body)
+  def mock_iqdb_matches(matches)
+    Danbooru.config.stubs(:iqdbs_server).returns("http://localhost:3004")
+    response = HTTP::Response.new(status: 200, body: matches.to_json, headers: { "Content-Type": "application/json" }, version: "1.1")
+    HTTP::Client.any_instance.stubs(:post).returns(response)
   end
 end