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, 46 insertions, 0 deletions

diff --git a/spec/rubyspec/core/hash/default_spec.rb b/spec/rubyspec/core/hash/default_spec.rb
new file mode 100644
index 0000000000..6c1c7377b7
--- /dev/null
+++ b/spec/rubyspec/core/hash/default_spec.rb
@@ -0,0 +1,46 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Hash#default" do
+  it "returns the default value" do
+    h = Hash.new(5)
+    h.default.should == 5
+    h.default(4).should == 5
+    {}.default.should == nil
+    {}.default(4).should == nil
+  end
+
+  it "uses the default proc to compute a default value, passing given key" do
+    h = Hash.new { |*args| args }
+    h.default(nil).should == [h, nil]
+    h.default(5).should == [h, 5]
+  end
+
+  it "calls default proc with nil arg if passed a default proc but no arg" do
+    h = Hash.new { |*args| args }
+    h.default.should == nil
+  end
+end
+
+describe "Hash#default=" do
+  it "sets the default value" do
+    h = {}
+    h.default = 99
+    h.default.should == 99
+  end
+
+  it "unsets the default proc" do
+    [99, nil, lambda { 6 }].each do |default|
+      h = Hash.new { 5 }
+      h.default_proc.should_not == nil
+      h.default = default
+      h.default.should == default
+      h.default_proc.should == nil
+    end
+  end
+
+  it "raises a RuntimeError if called on a frozen instance" do
+    lambda { HashSpecs.frozen_hash.default = nil }.should raise_error(RuntimeError)
+    lambda { HashSpecs.empty_frozen_hash.default = nil }.should raise_error(RuntimeError)
+  end
+end