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, 101 insertions, 0 deletions

diff --git a/spec/rubyspec/core/array/cycle_spec.rb b/spec/rubyspec/core/array/cycle_spec.rb
new file mode 100644
index 0000000000..2e60798c8c
--- /dev/null
+++ b/spec/rubyspec/core/array/cycle_spec.rb
@@ -0,0 +1,101 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../../enumerable/shared/enumeratorized', __FILE__)
+
+describe "Array#cycle" do
+  before :each do
+    ScratchPad.record []
+
+    @array = [1, 2, 3]
+    @prc = lambda { |x| ScratchPad << x }
+  end
+
+  it "does not yield and returns nil when the array is empty and passed value is an integer" do
+    [].cycle(6, &@prc).should be_nil
+    ScratchPad.recorded.should == []
+  end
+
+  it "does not yield and returns nil when the array is empty and passed value is nil" do
+    [].cycle(nil, &@prc).should be_nil
+    ScratchPad.recorded.should == []
+  end
+
+  it "does not yield and returns nil when passed 0" do
+    @array.cycle(0, &@prc).should be_nil
+    ScratchPad.recorded.should == []
+  end
+
+  it "iterates the array 'count' times yielding each item to the block" do
+    @array.cycle(2, &@prc)
+    ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3]
+  end
+
+  it "iterates indefinitely when not passed a count" do
+    @array.cycle do |x|
+      ScratchPad << x
+      break if ScratchPad.recorded.size > 7
+    end
+    ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3, 1, 2]
+  end
+
+  it "iterates indefinitely when passed nil" do
+    @array.cycle(nil) do |x|
+      ScratchPad << x
+      break if ScratchPad.recorded.size > 7
+    end
+    ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3, 1, 2]
+  end
+
+  it "does not rescue StopIteration when not passed a count" do
+    lambda do
+      @array.cycle { raise StopIteration }
+    end.should raise_error(StopIteration)
+  end
+
+  it "does not rescue StopIteration when passed a count" do
+    lambda do
+      @array.cycle(3) { raise StopIteration }
+    end.should raise_error(StopIteration)
+  end
+
+  it "iterates the array Integer(count) times when passed a Float count" do
+    @array.cycle(2.7, &@prc)
+    ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3]
+  end
+
+  it "calls #to_int to convert count to an Integer" do
+    count = mock("cycle count 2")
+    count.should_receive(:to_int).and_return(2)
+
+    @array.cycle(count, &@prc)
+    ScratchPad.recorded.should == [1, 2, 3, 1, 2, 3]
+  end
+
+  it "raises a TypeError if #to_int does not return an Integer" do
+    count = mock("cycle count 2")
+    count.should_receive(:to_int).and_return("2")
+
+    lambda { @array.cycle(count, &@prc) }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed a String" do
+    lambda { @array.cycle("4") { } }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed an Object" do
+    lambda { @array.cycle(mock("cycle count")) { } }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed true" do
+    lambda { @array.cycle(true) { } }.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed false" do
+    lambda { @array.cycle(false) { } }.should raise_error(TypeError)
+  end
+
+  before :all do
+    @object = [1, 2, 3, 4]
+    @empty_object = []
+  end
+  it_should_behave_like :enumeratorized_with_cycle_size
+end