1 files changed, 23 insertions, 0 deletions
diff --git a/spec/ruby/core/hash/each_key_spec.rb b/spec/ruby/core/hash/each_key_spec.rb
new file mode 100644
index 0000000000..5b2e9deb63
--- /dev/null
+++ b/spec/ruby/core/hash/each_key_spec.rb
@@ -0,0 +1,23 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+require_relative 'shared/iteration'
+require_relative '../enumerable/shared/enumeratorized'
+
+describe "Hash#each_key" do
+  it "calls block once for each key, passing key" do
+    r = {}
+    h = { 1 => -1, 2 => -2, 3 => -3, 4 => -4 }
+    h.each_key { |k| r[k] = k }.should.equal?(h)
+    r.should == { 1 => 1, 2 => 2, 3 => 3, 4 => 4 }
+  end
+
+  it "processes keys in the same order as keys()" do
+    keys = []
+    h = { 1 => -1, 2 => -2, 3 => -3, 4 => -4 }
+    h.each_key { |k| keys << k }
+    keys.should == h.keys
+  end
+
+  it_behaves_like :hash_iteration_no_block, :each_key
+  it_behaves_like :enumeratorized_with_origin_size, :each_key, { 1 => 2, 3 => 4, 5 => 6 }
+end