1 files changed, 37 insertions, 4 deletions
diff --git a/spec/ruby/core/hash/include_spec.rb b/spec/ruby/core/hash/include_spec.rb
index 8731673c19..1c32e9fb23 100644
--- a/spec/ruby/core/hash/include_spec.rb
+++ b/spec/ruby/core/hash/include_spec.rb
@@ -1,7 +1,40 @@
-require File.expand_path('../../../spec_helper', __FILE__)
-require File.expand_path('../fixtures/classes', __FILE__)
-require File.expand_path('../shared/key', __FILE__)
+require_relative '../../spec_helper'
 
 describe "Hash#include?" do
-  it_behaves_like(:hash_key_p, :include?)
+  it "returns true if argument is a key" do
+    h = { a: 1, b: 2, c: 3, 4 => 0 }
+    h.include?(:a).should == true
+    h.include?(:b).should == true
+    h.include?(2).should == false
+    h.include?(4).should == true
+
+    not_supported_on :opal do
+      h.include?('b').should == false
+      h.include?(4.0).should == false
+    end
+  end
+
+  it "returns true if the key's matching value was nil" do
+    { xyz: nil }.include?(:xyz).should == true
+  end
+
+  it "returns true if the key's matching value was false" do
+    { xyz: false }.include?(:xyz).should == true
+  end
+
+  it "returns true if the key is nil" do
+    { nil => 'b' }.include?(nil).should == true
+    { nil => nil }.include?(nil).should == true
+  end
+
+  it "compares keys with the same #hash value via #eql?" do
+    x = mock('x')
+    x.stub!(:hash).and_return(42)
+
+    y = mock('y')
+    y.stub!(:hash).and_return(42)
+    y.should_receive(:eql?).and_return(false)
+
+    { x => nil }.include?(y).should == false
+  end
 end