Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/core/string/clear_spec.rb

@@ -0,0 +1,39 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe "String#clear" do
+    before :each do
+      @s = "Jolene"
+    end
+
+    it "sets self equal to the empty String" do
+      @s.clear
+      @s.should == ""
+    end
+
+    it "returns self after emptying it" do
+      cleared = @s.clear
+      cleared.should == ""
+      cleared.object_id.should == @s.object_id
+    end
+
+    it "preserves its encoding" do
+      @s.encode!(Encoding::SHIFT_JIS)
+      @s.encoding.should == Encoding::SHIFT_JIS
+      @s.clear.encoding.should == Encoding::SHIFT_JIS
+      @s.encoding.should == Encoding::SHIFT_JIS
+    end
+
+    it "works with multibyte Strings" do
+      s = "\u{9765}\u{876}"
+      s.clear
+      s.should == ""
+    end
+
+    it "raises a RuntimeError if self is frozen" do
+      @s.freeze
+      lambda { @s.clear        }.should raise_error(RuntimeError)
+      lambda { "".freeze.clear }.should raise_error(RuntimeError)
+    end
+  end
+end