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/math/frexp_spec.rb

@@ -0,0 +1,37 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Math.frexp" do
+  it "returns the normalized fraction and exponent" do
+    frac, exp = Math.frexp(102.83)
+    frac.should be_close(0.803359375, TOLERANCE)
+    exp.should == 7
+  end
+
+  it "raises a TypeError if the argument cannot be coerced with Float()" do
+    lambda { Math.frexp("test") }.should raise_error(TypeError)
+  end
+
+  it "returns NaN given NaN" do
+    frac, _exp = Math.frexp(nan_value)
+    frac.nan?.should be_true
+  end
+
+  it "raises a TypeError if the argument is nil" do
+    lambda { Math.frexp(nil) }.should raise_error(TypeError)
+  end
+
+  it "accepts any argument that can be coerced with Float()" do
+    frac, exp = Math.frexp(MathSpecs::Float.new)
+    frac.should be_close(0.5, TOLERANCE)
+    exp.should == 1
+  end
+end
+
+describe "Math#frexp" do
+  it "is accessible as a private instance method" do
+    frac, exp = IncludesMath.new.send(:frexp, 2.1415)
+    frac.should be_close(0.535375, TOLERANCE)
+    exp.should == 2
+  end
+end