1 files changed, 55 insertions, 0 deletions
diff --git a/spec/ruby/core/thread/element_reference_spec.rb b/spec/ruby/core/thread/element_reference_spec.rb
new file mode 100644
index 0000000000..fde9d1f440
--- /dev/null
+++ b/spec/ruby/core/thread/element_reference_spec.rb
@@ -0,0 +1,55 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Thread#[]" do
+  it "gives access to thread local values" do
+    th = Thread.new do
+      Thread.current[:value] = 5
+    end
+    th.join
+    th[:value].should == 5
+    Thread.current[:value].should == nil
+  end
+
+  it "is not shared across threads" do
+    t1 = Thread.new do
+      Thread.current[:value] = 1
+    end
+    t2 = Thread.new do
+      Thread.current[:value] = 2
+    end
+    [t1,t2].each {|x| x.join}
+    t1[:value].should == 1
+    t2[:value].should == 2
+  end
+
+  it "is accessible using strings or symbols" do
+    t1 = Thread.new do
+      Thread.current[:value] = 1
+    end
+    t2 = Thread.new do
+      Thread.current["value"] = 2
+    end
+    [t1,t2].each {|x| x.join}
+    t1[:value].should == 1
+    t1["value"].should == 1
+    t2[:value].should == 2
+    t2["value"].should == 2
+  end
+
+  it "converts a key that is neither String nor Symbol with #to_str" do
+    key = mock('value')
+    key.should_receive(:to_str).and_return('value')
+
+    th = Thread.new do
+      Thread.current[:value] = 1
+    end.join
+
+    th[key].should == 1
+  end
+
+  it "raises exceptions on the wrong type of keys" do
+    -> { Thread.current[nil] }.should raise_error(TypeError)
+    -> { Thread.current[5] }.should raise_error(TypeError)
+  end
+end