1 files changed, 63 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/Hash_spec.rb b/spec/ruby/core/kernel/Hash_spec.rb
new file mode 100644
index 0000000000..cbe098a8ac
--- /dev/null
+++ b/spec/ruby/core/kernel/Hash_spec.rb
@@ -0,0 +1,63 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Kernel#hash" do
+  it "is provided" do
+    1.respond_to?(:hash).should == true
+  end
+
+  it "is stable" do
+    1.hash.should == 1.hash
+  end
+end
+
+describe "Kernel" do
+  it "has private instance method Hash()" do
+    Kernel.should have_private_instance_method(:Hash)
+  end
+end
+
+describe :kernel_Hash, shared: true do
+  before :each do
+    @hash = { a: 1}
+  end
+
+  it "converts nil to a Hash" do
+    @object.send(@method, nil).should == {}
+  end
+
+  it "converts an empty array to a Hash" do
+    @object.send(@method, []).should == {}
+  end
+
+  it "does not call #to_hash on an Hash" do
+    @hash.should_not_receive(:to_hash)
+    @object.send(@method, @hash).should == @hash
+  end
+
+  it "calls #to_hash to convert the argument to an Hash" do
+    obj = mock("Hash(a: 1)")
+    obj.should_receive(:to_hash).and_return(@hash)
+
+    @object.send(@method, obj).should == @hash
+  end
+
+  it "raises a TypeError if it doesn't respond to #to_hash" do
+    -> { @object.send(@method, mock("")) }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if #to_hash does not return an Hash" do
+    obj = mock("Hash() string")
+    obj.should_receive(:to_hash).and_return("string")
+
+    -> { @object.send(@method, obj) }.should raise_error(TypeError)
+  end
+end
+
+describe "Kernel.Hash" do
+  it_behaves_like :kernel_Hash, :Hash_method, KernelSpecs
+end
+
+describe "Kernel#Hash" do
+  it_behaves_like :kernel_Hash, :Hash_function, KernelSpecs
+end