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, 54 insertions, 0 deletions

diff --git a/spec/rubyspec/shared/rational/div.rb b/spec/rubyspec/shared/rational/div.rb
new file mode 100644
index 0000000000..23c11f5d12
--- /dev/null
+++ b/spec/rubyspec/shared/rational/div.rb
@@ -0,0 +1,54 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe :rational_div_rat, shared: true do
+  it "performs integer division and returns the result" do
+    Rational(2, 3).div(Rational(2, 3)).should == 1
+    Rational(-2, 9).div(Rational(-9, 2)).should == 0
+  end
+
+  it "raises a ZeroDivisionError when the argument has a numerator of 0" do
+    lambda { Rational(3, 4).div(Rational(0, 3)) }.should raise_error(ZeroDivisionError)
+  end
+
+  it "raises a ZeroDivisionError when the argument has a numerator of 0.0" do
+    lambda { Rational(3, 4).div(Rational(0.0, 3)) }.should raise_error(ZeroDivisionError)
+  end
+end
+
+describe :rational_div_float, shared: true do
+  it "performs integer division and returns the result" do
+    Rational(2, 3).div(30.333).should == 0
+    Rational(2, 9).div(Rational(-8.6)).should == -1
+    Rational(3.12).div(0.5).should == 6
+  end
+
+  it "raises a ZeroDivisionError when the argument is 0.0" do
+    lambda { Rational(3, 4).div(0.0) }.should raise_error(ZeroDivisionError)
+  end
+end
+
+describe :rational_div_int, shared: true do
+  it "performs integer division and returns the result" do
+    Rational(2, 1).div(1).should == 2
+    Rational(25, 5).div(-50).should == -1
+  end
+
+  it "raises a ZeroDivisionError when the argument is 0" do
+    lambda { Rational(3, 4).div(0) }.should raise_error(ZeroDivisionError)
+  end
+end
+
+describe :rational_div, shared: true do
+  it "returns an Integer" do
+    Rational(229, 21).div(82).should be_kind_of(Integer)
+  end
+
+  it "raises an ArgumentError if passed more than one argument" do
+    lambda { Rational(3, 4).div(2,3) }.should raise_error(ArgumentError)
+  end
+
+  # See http://redmine.ruby-lang.org/issues/show/1648
+  it "raises a TypeError if passed a non-numeric argument" do
+    lambda { Rational(3, 4).div([]) }.should raise_error(TypeError)
+  end
+end