Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 45 insertions, 0 deletions

diff --git a/spec/rubyspec/shared/rational/floor.rb b/spec/rubyspec/shared/rational/floor.rb
new file mode 100644
index 0000000000..5106e0b4d9
--- /dev/null
+++ b/spec/rubyspec/shared/rational/floor.rb
@@ -0,0 +1,45 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe :rational_floor, shared: true do
+  before do
+    @rational = Rational(2200, 7)
+  end
+
+  describe "with no arguments (precision = 0)" do
+    it "returns an integer" do
+      @rational.floor.should be_kind_of(Integer)
+    end
+
+    it "returns the truncated value toward negative infinity" do
+      @rational.floor.should == 314
+      Rational(1, 2).floor.should == 0
+      Rational(-1, 2).floor.should == -1
+    end
+  end
+
+  describe "with a precision < 0" do
+    it "returns an integer" do
+      @rational.floor(-2).should be_kind_of(Integer)
+      @rational.floor(-1).should be_kind_of(Integer)
+    end
+
+    it "moves the truncation point n decimal places left" do
+      @rational.floor(-3).should == 0
+      @rational.floor(-2).should == 300
+      @rational.floor(-1).should == 310
+    end
+  end
+
+  describe "with a precision > 0" do
+    it "returns a Rational" do
+      @rational.floor(1).should be_kind_of(Rational)
+      @rational.floor(2).should be_kind_of(Rational)
+    end
+
+    it "moves the truncation point n decimal places right" do
+      @rational.floor(1).should == Rational(1571, 5)
+      @rational.floor(2).should == Rational(7857, 25)
+      @rational.floor(3).should == Rational(62857, 200)
+    end
+  end
+end