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, 42 insertions, 0 deletions

diff --git a/spec/rubyspec/core/argf/skip_spec.rb b/spec/rubyspec/core/argf/skip_spec.rb
new file mode 100644
index 0000000000..5f5e9eb79a
--- /dev/null
+++ b/spec/rubyspec/core/argf/skip_spec.rb
@@ -0,0 +1,42 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "ARGF.skip" do
+  before :each do
+    @file1_name = fixture __FILE__, "file1.txt"
+    @file2_name = fixture __FILE__, "file2.txt"
+
+    @file2 = File.readlines @file2_name
+  end
+
+  it "skips the current file" do
+    argf [@file1_name, @file2_name] do
+      @argf.read(1)
+      @argf.skip
+      @argf.gets.should == @file2.first
+    end
+  end
+
+  it "has no effect when called twice in a row" do
+    argf [@file1_name, @file2_name] do
+      @argf.read(1)
+      @argf.skip
+      @argf.skip
+      @argf.gets.should == @file2.first
+    end
+  end
+
+  it "has no effect at end of stream" do
+    argf [@file1_name, @file2_name] do
+      @argf.read
+      @argf.skip
+      @argf.gets.should == nil
+    end
+  end
+
+  # This bypasses argf helper because the helper will call argf.file
+  # which as a side-effect calls argf.file which will initialize
+  # internals of ARGF enough for this to work.
+  it "has no effect when nothing has been processed yet" do
+    lambda { ARGF.class.new(@file1_name).skip }.should_not raise_error
+  end
+end