adding TCP#addresses?, which drops on-the-fly expired entries, and therefore makes possible to DNS query for persistent connections

lib/httpx/adapters/webmock.rb

@@ -60,7 +60,7 @@ module WebMock
           connection.once(:unmock_connection) do
             next unless connection.current_session == self
 
-            unless connection.addresses
+            unless connection.addresses?
               # reset Happy Eyeballs, fail early
               connection.sibling = nil
 

lib/httpx/connection.rb

@@ -122,6 +122,10 @@ module HTTPX
       @io && @io.addresses
     end
 
+    def addresses?
+      @io && @io.addresses?
+    end
+
     def match?(uri, options)
       return false if !used? && (@state == :closing || @state == :closed)
 

lib/httpx/io/tcp.rb

@@ -30,7 +30,7 @@ module HTTPX
         raise Error, "Given IO objects do not match the request authority" unless @io
 
         _, _, _, ip = @io.addr
-        @ip = Resolver::Entry(ip)
+        @ip = Resolver::Entry.new(ip)
         @addresses << @ip
         @keep_open = true
         @state = :connected
@@ -57,6 +57,13 @@ module HTTPX
       end
     end
 
+    # eliminates expired entries and returns whether there are still any left.
+    def addresses?
+      @addresses.delete_if(&:expired?)
+
+      @addresses.any?
+    end
+
     def to_io
       @io.to_io
     end
@@ -165,7 +172,7 @@ module HTTPX
       # do not mess with external sockets
       return false if @options.io
 
-      return true unless @addresses
+      return true if @addresses.empty?
 
       resolver_addresses = Resolver.nolookup_resolve(@hostname)
 

lib/httpx/io/unix.rb

@@ -51,6 +51,11 @@ module HTTPX
            IO::WaitReadable
     end
 
+    # the path is always explicitly passed, so no point in resolving.
+    def addresses?
+      true
+    end
+
     def expired?
       false
     end

lib/httpx/session.rb

@@ -370,7 +370,7 @@ module HTTPX
     end
 
     def resolve_connection(connection, selector)
-      if connection.addresses || connection.open?
+      if connection.addresses? || connection.open?
         #
         # there are two cases in which we want to activate initialization of
         # connection immediately:

sig/connection.rbs

@@ -58,6 +58,8 @@ module HTTPX
 
     def send: (Request request) -> void
 
+    def addresses?: () -> boolish
+
     def match?: (URI::Generic uri, Options options) -> bool
 
     def expired?: () -> boolish

sig/io/tcp.rbs

@@ -31,6 +31,8 @@ module HTTPX
 
     def add_addresses: (Array[Resolver::Entry] addrs) -> void
 
+    def addresses?: () -> bool
+
     def to_io: () -> IO
 
     def protocol: () -> String