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, 50 insertions, 0 deletions

diff --git a/spec/rubyspec/library/stringio/string_spec.rb b/spec/rubyspec/library/stringio/string_spec.rb
new file mode 100644
index 0000000000..7c4181b6de
--- /dev/null
+++ b/spec/rubyspec/library/stringio/string_spec.rb
@@ -0,0 +1,50 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "StringIO#string" do
+  it "returns the underlying string" do
+    io = StringIO.new(str = "hello")
+    io.string.should equal(str)
+  end
+end
+
+describe "StringIO#string=" do
+  before :each do
+    @io = StringIO.new("example\nstring")
+  end
+
+  it "returns the passed String" do
+    str = "test"
+    (@io.string = str).should equal(str)
+  end
+
+  it "changes the underlying string" do
+    str = "hello"
+    @io.string = str
+    @io.string.should equal(str)
+  end
+
+  it "resets the position" do
+    @io.pos = 1
+    @io.string = "other"
+    @io.pos.should eql(0)
+  end
+
+  it "resets the line number" do
+    @io.lineno = 1
+    @io.string = "other"
+    @io.lineno.should eql(0)
+  end
+
+  it "tries to convert the passed Object to a String using #to_str" do
+    obj = mock("to_str")
+    obj.should_receive(:to_str).and_return("to_str")
+
+    @io.string = obj
+    @io.string.should == "to_str"
+  end
+
+  it "raises a TypeError when the passed Object can't be converted to an Integer" do
+    lambda { @io.seek(Object.new) }.should raise_error(TypeError)
+  end
+end