From cc09dc3477d924bf5bfb447275b5a8c01c22c9e3 Mon Sep 17 00:00:00 2001
From: Nils Mueller <nils@platogo.com>
Date: Mon, 22 Jun 2020 15:13:31 +0200
Subject: [PATCH] Support variadic exists and exists?

redis-rb 4.2.0 made `exists` variadic and introduced `exists?`
---
 lib/redis/namespace.rb |  3 ++-
 spec/redis_spec.rb     | 14 +++++++++++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/redis/namespace.rb b/lib/redis/namespace.rb
index 56295fa..b8911b9 100644
--- a/lib/redis/namespace.rb
+++ b/lib/redis/namespace.rb
@@ -68,7 +68,8 @@ class Namespace
       "decrby"           => [ :first ],
       "del"              => [ :all   ],
       "dump"             => [ :first ],
-      "exists"           => [ :first ],
+      "exists"           => [ :all ],
+      "exists?"          => [ :all ],
       "expire"           => [ :first ],
       "expireat"         => [ :first ],
       "eval"             => [ :eval_style ],
diff --git a/spec/redis_spec.rb b/spec/redis_spec.rb
index 4278692..eaf6e52 100644
--- a/spec/redis_spec.rb
+++ b/spec/redis_spec.rb
@@ -140,10 +140,22 @@
 
   it 'should be able to use a namespace with setbit' do
     @namespaced.setbit('virgin_key', 1, 1)
-    expect(@namespaced.exists('virgin_key')).to be true
+    expect(@namespaced.exists?('virgin_key')).to be true
     expect(@namespaced.get('virgin_key')).to eq(@namespaced.getrange('virgin_key',0,-1))
   end
 
+  it 'should be able to use a namespace with exists' do
+    @namespaced.set('foo', 1000)
+    @namespaced.set('bar', 2000)
+    expect(@namespaced.exists('foo', 'bar')).to eq(2)
+  end
+
+  it 'should be able to use a namespace with exists?' do
+    @namespaced.set('foo', 1000)
+    @namespaced.set('bar', 2000)
+    expect(@namespaced.exists?('does_not_exist', 'bar')).to eq(true)
+  end
+
   it 'should be able to use a namespace with bitpos' do
     @namespaced.setbit('bit_map', 42, 1)
     expect(@namespaced.bitpos('bit_map', 0)).to eq(0)