1 files changed, 34 insertions, 0 deletions
diff --git a/spec/ruby/core/env/each_key_spec.rb b/spec/ruby/core/env/each_key_spec.rb
new file mode 100644
index 0000000000..ad2cb560a0
--- /dev/null
+++ b/spec/ruby/core/env/each_key_spec.rb
@@ -0,0 +1,34 @@
+require_relative '../../spec_helper'
+require_relative '../enumerable/shared/enumeratorized'
+
+describe "ENV.each_key" do
+
+  it "returns each key" do
+    e = []
+    orig = ENV.to_hash
+    begin
+      ENV.clear
+      ENV["1"] = "3"
+      ENV["2"] = "4"
+      ENV.each_key { |k| e << k }.should.equal?(ENV)
+      e.should.include?("1")
+      e.should.include?("2")
+    ensure
+      ENV.replace orig
+    end
+  end
+
+  it "returns an Enumerator if called without a block" do
+    enum = ENV.each_key
+    enum.should.instance_of?(Enumerator)
+    enum.to_a.should == ENV.keys
+  end
+
+  it "returns keys in the locale encoding" do
+    ENV.each_key do |key|
+      key.encoding.should == Encoding.find('locale')
+    end
+  end
+
+  it_behaves_like :enumeratorized_with_origin_size, :each_key, ENV
+end