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, 122 insertions, 0 deletions

diff --git a/spec/rubyspec/core/array/new_spec.rb b/spec/rubyspec/core/array/new_spec.rb
new file mode 100644
index 0000000000..4d26024ff2
--- /dev/null
+++ b/spec/rubyspec/core/array/new_spec.rb
@@ -0,0 +1,122 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Array.new" do
+  it "returns an instance of Array" do
+    Array.new.should be_an_instance_of(Array)
+  end
+
+  it "returns an instance of a subclass" do
+    ArraySpecs::MyArray.new(1, 2).should be_an_instance_of(ArraySpecs::MyArray)
+  end
+
+  it "raises an ArgumentError if passed 3 or more arguments" do
+    lambda do
+      [1, 2].send :initialize, 1, 'x', true
+    end.should raise_error(ArgumentError)
+    lambda do
+      [1, 2].send(:initialize, 1, 'x', true) {}
+    end.should raise_error(ArgumentError)
+  end
+end
+
+describe "Array.new with no arguments" do
+  it "returns an empty array" do
+    Array.new.should be_empty
+  end
+
+  it "does not use the given block" do
+    lambda{ Array.new { raise } }.should_not raise_error
+  end
+end
+
+describe "Array.new with (array)" do
+  it "returns an array initialized to the other array" do
+    b = [4, 5, 6]
+    Array.new(b).should == b
+  end
+
+  it "does not use the given block" do
+    lambda{ Array.new([1, 2]) { raise } }.should_not raise_error
+  end
+
+  it "calls #to_ary to convert the value to an array" do
+    a = mock("array")
+    a.should_receive(:to_ary).and_return([1, 2])
+    a.should_not_receive(:to_int)
+    Array.new(a).should == [1, 2]
+  end
+
+  it "does not call #to_ary on instances of Array or subclasses of Array" do
+    a = [1, 2]
+    a.should_not_receive(:to_ary)
+    Array.new(a)
+  end
+
+  it "raises a TypeError if an Array type argument and a default object" do
+    lambda { Array.new([1, 2], 1) }.should raise_error(TypeError)
+  end
+end
+
+describe "Array.new with (size, object=nil)" do
+  it "returns an array of size filled with object" do
+    obj = [3]
+    a = Array.new(2, obj)
+    a.should == [obj, obj]
+    a[0].should equal(obj)
+    a[1].should equal(obj)
+
+    Array.new(3, 14).should == [14, 14, 14]
+  end
+
+  it "returns an array of size filled with nil when object is omitted" do
+    Array.new(3).should == [nil, nil, nil]
+  end
+
+  it "raises an ArgumentError if size is negative" do
+    lambda { Array.new(-1, :a) }.should raise_error(ArgumentError)
+    lambda { Array.new(-1) }.should raise_error(ArgumentError)
+  end
+
+  it "raises an ArgumentError if size is too large" do
+    lambda { Array.new(fixnum_max+1) }.should raise_error(ArgumentError)
+  end
+
+  it "calls #to_int to convert the size argument to an Integer when object is given" do
+    obj = mock('1')
+    obj.should_receive(:to_int).and_return(1)
+    Array.new(obj, :a).should == [:a]
+  end
+
+  it "calls #to_int to convert the size argument to an Integer when object is not given" do
+    obj = mock('1')
+    obj.should_receive(:to_int).and_return(1)
+    Array.new(obj).should == [nil]
+  end
+
+  it "raises a TypeError if the size argument is not an Integer type" do
+    obj = mock('nonnumeric')
+    obj.stub!(:to_ary).and_return([1, 2])
+    lambda{ Array.new(obj, :a) }.should raise_error(TypeError)
+  end
+
+  it "yields the index of the element and sets the element to the value of the block" do
+    Array.new(3) { |i| i.to_s }.should == ['0', '1', '2']
+  end
+
+  it "uses the block value instead of using the default value" do
+    lambda {
+      @result = Array.new(3, :obj) { |i| i.to_s }
+    }.should complain(/block supersedes default value argument/)
+    @result.should == ['0', '1', '2']
+  end
+
+  it "returns the value passed to break" do
+    a = Array.new(3) do |i|
+      break if i == 2
+      i.to_s
+    end
+
+    a.should == nil
+  end
+end