Add EXPIRETIME

lib/redis/commands/keys.rb

@@ -105,6 +105,14 @@ def expireat(key, unix_time, nx: nil, xx: nil, gt: nil, lt: nil)
         send_command(args, &Boolify)
       end
 
+      # Get a key's expiration time as an absolute Unix timestamp (since January 1, 1970) in seconds
+      #
+      # @param  [String] key
+      # @return [Integer] expiry time of the key, specified as a UNIX timestamp
+      def expiretime(key)
+        send_command([:expiretime, key])
+      end
+
       # Get the time to live (in seconds) for a key.
       #
       # @param [String] key

lib/redis/distributed.rb

@@ -130,6 +130,11 @@ def expireat(key, unix_time, **kwargs)
       node_for(key).expireat(key, unix_time, **kwargs)
     end
 
+    # Get the expiration for a key as a UNIX timestamp.
+    def expiretime(key)
+      node_for(key).expiretime(key)
+    end
+
     # Get the time to live (in seconds) for a key.
     def ttl(key)
       node_for(key).ttl(key)

test/lint/value_types.rb

@@ -118,6 +118,19 @@ def test_expireat_keywords
       end
     end
 
+    def test_expiretime
+      target_version "7.0.0" do
+        r.set("foo", "blar")
+        assert_equal(-1, r.expiretime("foo"))
+
+        exp_time = (Time.now + 2).to_i
+        r.expireat("foo", exp_time)
+        assert_equal exp_time, r.expiretime("foo")
+
+        assert_equal(-2, r.expiretime("key-that-exists-not"))
+      end
+    end
+
     def test_pexpireat
       r.set("foo", "s1")
       assert r.pexpireat("foo", (Time.now + 2).to_i * 1_000)