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/numeric/uminus_spec.rb

@@ -0,0 +1,31 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Numeric#-@" do
+  it "returns the same value with opposite sign (integers)" do
+    0.send(:-@).should == 0
+    100.send(:-@).should == -100
+    -100.send(:-@).should == 100
+  end
+
+  it "returns the same value with opposite sign (floats)" do
+    34.56.send(:-@).should == -34.56
+    -34.56.send(:-@).should == 34.56
+  end
+
+  it "returns the same value with opposite sign (two complement)" do
+    2147483648.send(:-@).should == -2147483648
+    -2147483648.send(:-@).should == 2147483648
+    9223372036854775808.send(:-@).should == -9223372036854775808
+    -9223372036854775808.send(:-@).should == 9223372036854775808
+  end
+
+  describe "with a Numeric subclass" do
+    it "calls #coerce(0) on self, then subtracts the second element of the result from the first" do
+      ten  = mock_numeric('10')
+      zero = mock_numeric('0')
+      ten.should_receive(:coerce).with(0).and_return([zero, ten])
+      zero.should_receive(:-).with(ten).and_return(-10)
+      ten.send(:-@).should == -10
+    end
+  end
+end