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, 59 insertions, 0 deletions

diff --git a/spec/rubyspec/core/env/shift_spec.rb b/spec/rubyspec/core/env/shift_spec.rb
new file mode 100644
index 0000000000..bae6a17ba0
--- /dev/null
+++ b/spec/rubyspec/core/env/shift_spec.rb
@@ -0,0 +1,59 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "ENV.shift" do
+  it "returns a pair and deletes it" do
+    ENV.empty?.should == false
+    orig = ENV.to_hash
+    begin
+      pair = ENV.shift
+      ENV.has_key?(pair.first).should == false
+    ensure
+      ENV.replace orig
+    end
+    ENV.has_key?(pair.first).should == true
+  end
+
+  it "returns nil if ENV.empty?" do
+    orig = ENV.to_hash
+    begin
+      ENV.clear
+      ENV.shift.should == nil
+    ensure
+      ENV.replace orig
+    end
+  end
+end
+
+with_feature :encoding do
+  describe "ENV.shift" do
+    before :each do
+      @orig = ENV.to_hash
+      @external = Encoding.default_external
+      @internal = Encoding.default_internal
+
+      Encoding.default_external = Encoding::ASCII_8BIT
+    end
+
+    after :each do
+      Encoding.default_external = @external
+      Encoding.default_internal = @internal
+      ENV.replace @orig
+    end
+
+    it "uses the locale encoding if Encoding.default_internal is nil" do
+      Encoding.default_internal = nil
+
+      pair = ENV.shift
+      pair.first.encoding.should equal(Encoding.find("locale"))
+      pair.last.encoding.should equal(Encoding.find("locale"))
+    end
+
+    it "transcodes from the locale encoding to Encoding.default_internal if set" do
+      Encoding.default_internal = Encoding::IBM437
+
+      pair = ENV.shift
+      pair.first.encoding.should equal(Encoding::IBM437)
+      pair.last.encoding.should equal(Encoding::IBM437)
+    end
+  end
+end