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/array/clear_spec.rb b/spec/rubyspec/core/array/clear_spec.rb
new file mode 100644
index 0000000000..851c90d654
--- /dev/null
+++ b/spec/rubyspec/core/array/clear_spec.rb
@@ -0,0 +1,49 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Array#clear" do
+  it "removes all elements" do
+    a = [1, 2, 3, 4]
+    a.clear.should equal(a)
+    a.should == []
+  end
+
+  it "returns self" do
+    a = [1]
+    oid = a.object_id
+    a.clear.object_id.should == oid
+  end
+
+  it "leaves the Array empty" do
+    a = [1]
+    a.clear
+    a.empty?.should == true
+    a.size.should == 0
+  end
+
+  it "keeps tainted status" do
+    a = [1]
+    a.taint
+    a.tainted?.should be_true
+    a.clear
+    a.tainted?.should be_true
+  end
+
+  it "does not accept any arguments" do
+    lambda { [1].clear(true) }.should raise_error(ArgumentError)
+  end
+
+  it "keeps untrusted status" do
+    a = [1]
+    a.untrust
+    a.untrusted?.should be_true
+    a.clear
+    a.untrusted?.should be_true
+  end
+
+  it "raises a RuntimeError on a frozen array" do
+    a = [1]
+    a.freeze
+    lambda { a.clear }.should raise_error(RuntimeError)
+  end
+end