From b2d8310b16bffa26f2ec4ab6c215eb92f731f063 Mon Sep 17 00:00:00 2001
From: HeroProtagonist <jstepper91@gmail.com>
Date: Sun, 17 Oct 2021 12:23:15 -0400
Subject: [PATCH] Add specs for proc `taking |*a, **kw| arguments`

---
 language/proc_spec.rb | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/language/proc_spec.rb b/language/proc_spec.rb
index c44e711d2b..bae2a856c4 100644
--- a/language/proc_spec.rb
+++ b/language/proc_spec.rb
@@ -217,4 +217,30 @@
       lambda { @l.call(obj) }.should raise_error(TypeError)
     end
   end
+
+  describe "taking |*a, **kw| arguments" do
+    before :each do
+      @p = proc { |*a, **kw| [a, kw] }
+    end
+
+    ruby_version_is ""..."2.7" do
+      it 'autosplats keyword arguments' do
+        @p.call([1, {a: 1}]).should == [[1], {a: 1}]
+      end
+    end
+
+    ruby_version_is "2.7"..."3.0" do
+      it 'autosplats keyword arguments and warns' do
+        -> {
+          @p.call([1, {a: 1}]).should == [[1], {a: 1}]
+        }.should complain(/warning: Using the last argument as keyword parameters is deprecated; maybe \*\* should be added to the call/)  
+      end
+    end
+
+    ruby_version_is "3.0" do
+      it 'does not autosplat keyword' do
+        @p.call([1, {a: 1}]).should == [[[1, {a: 1}]], {}]
+      end
+    end
+  end
 end