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, 49 insertions, 0 deletions

diff --git a/spec/rubyspec/core/fixnum/fdiv_spec.rb b/spec/rubyspec/core/fixnum/fdiv_spec.rb
new file mode 100644
index 0000000000..bb5f09c333
--- /dev/null
+++ b/spec/rubyspec/core/fixnum/fdiv_spec.rb
@@ -0,0 +1,49 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Fixnum#fdiv" do
+  it "performs floating-point division between self and a Fixnum" do
+    8.fdiv(7).should be_close(1.14285714285714, TOLERANCE)
+  end
+
+  it "performs floating-point division between self and a Bignum" do
+    8.fdiv(bignum_value).should be_close(8.673617379884035e-19, TOLERANCE)
+  end
+
+  it "performs floating-point division between self and a Float" do
+    8.fdiv(9.0).should be_close(0.888888888888889, TOLERANCE)
+  end
+
+  it "returns NaN when the argument is NaN" do
+    -1.fdiv(nan_value).nan?.should be_true
+    1.fdiv(nan_value).nan?.should be_true
+  end
+
+  it "returns Infinity when the argument is 0" do
+    1.fdiv(0).infinite?.should == 1
+  end
+
+  it "returns -Infinity when the argument is 0 and self is negative" do
+    -1.fdiv(0).infinite?.should == -1
+  end
+
+  it "returns Infinity when the argument is 0.0" do
+    1.fdiv(0.0).infinite?.should == 1
+  end
+
+  it "returns -Infinity when the argument is 0.0 and self is negative" do
+    -1.fdiv(0.0).infinite?.should == -1
+  end
+
+  it "raises a TypeError when argument isn't numeric" do
+    lambda { 1.fdiv(mock('non-numeric')) }.should raise_error(TypeError)
+  end
+
+  it "raises an ArgumentError when passed multiple arguments" do
+    lambda { 1.fdiv(6,0.2) }.should raise_error(ArgumentError)
+  end
+
+  it "follows the coercion protocol" do
+    (obj = mock('10')).should_receive(:coerce).with(1).and_return([1, 10])
+    1.fdiv(obj).should == 0.1
+  end
+end