🍒 pick 6546305: ✅ Test current #setquota behavior [backports #636]

Includes fixes for v0.4 compatibility.

test/net/imap/test_imap_quota.rb

@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require "net/imap"
+require "test/unit"
+require_relative "fake_server"
+
+class IMAPQuotaTest < Test::Unit::TestCase
+  include Net::IMAP::FakeServer::TestHelper
+
+  def setup
+    Net::IMAP.config.reset
+    @do_not_reverse_lookup = Socket.do_not_reverse_lookup
+    Socket.do_not_reverse_lookup = true
+    @threads = []
+  end
+
+  def teardown
+    if !@threads.empty?
+      assert_join_threads(@threads)
+    end
+  ensure
+    Socket.do_not_reverse_lookup = @do_not_reverse_lookup
+  end
+
+  test "#setquota(quota_root, limit)" do
+    with_fake_server do |server, imap|
+      server.on "SETQUOTA", &:done_ok
+
+      # integer arg
+      imap.setquota "INBOX", 512
+      rcvd_cmd = server.commands.pop
+      assert_equal "SETQUOTA",            rcvd_cmd.name
+      assert_equal "INBOX (STORAGE 512)", rcvd_cmd.args
+
+      # string arg
+      imap.setquota "INBOX", "512"
+      rcvd_cmd = server.commands.pop
+      assert_equal "SETQUOTA",            rcvd_cmd.name
+      assert_equal "INBOX (STORAGE 512)", rcvd_cmd.args
+
+      # empty quota root, null limit
+      imap.setquota "", nil
+      rcvd_cmd = server.commands.pop
+      assert_equal "SETQUOTA",            rcvd_cmd.name
+      assert_equal '"" ()',               rcvd_cmd.args
+    end
+  end
+end