mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
100 lines
3.3 KiB
Ruby
100 lines
3.3 KiB
Ruby
require_relative '../../spec_helper'
|
|
require_relative 'fixtures/classes'
|
|
|
|
describe "Enumerable#chunk" do
|
|
before do
|
|
ScratchPad.record []
|
|
end
|
|
|
|
ruby_version_is ""..."2.4" do
|
|
it "raises an ArgumentError if called without a block" do
|
|
lambda do
|
|
EnumerableSpecs::Numerous.new.chunk
|
|
end.should raise_error(ArgumentError)
|
|
end
|
|
end
|
|
|
|
ruby_version_is "2.4" do
|
|
it "returns an Enumerator if called without a block" do
|
|
chunk = EnumerableSpecs::Numerous.new(1, 2, 3, 1, 2).chunk
|
|
chunk.should be_an_instance_of(Enumerator)
|
|
result = chunk.with_index {|elt, i| elt - i }.to_a
|
|
result.should == [[1, [1, 2, 3]], [-2, [1, 2]]]
|
|
end
|
|
end
|
|
|
|
it "returns an Enumerator if given a block" do
|
|
EnumerableSpecs::Numerous.new.chunk {}.should be_an_instance_of(Enumerator)
|
|
end
|
|
|
|
it "yields the current element and the current chunk to the block" do
|
|
e = EnumerableSpecs::Numerous.new(1, 2, 3)
|
|
e.chunk { |x| ScratchPad << x }.to_a
|
|
ScratchPad.recorded.should == [1, 2, 3]
|
|
end
|
|
|
|
it "returns elements of the Enumerable in an Array of Arrays, [v, ary], where 'ary' contains the consecutive elements for which the block returned the value 'v'" do
|
|
e = EnumerableSpecs::Numerous.new(1, 2, 3, 2, 3, 2, 1)
|
|
result = e.chunk { |x| x < 3 && 1 || 0 }.to_a
|
|
result.should == [[1, [1, 2]], [0, [3]], [1, [2]], [0, [3]], [1, [2, 1]]]
|
|
end
|
|
|
|
it "returns elements for which the block returns :_alone in separate Arrays" do
|
|
e = EnumerableSpecs::Numerous.new(1, 2, 3, 2, 1)
|
|
result = e.chunk { |x| x < 2 && :_alone }.to_a
|
|
result.should == [[:_alone, [1]], [false, [2, 3, 2]], [:_alone, [1]]]
|
|
end
|
|
|
|
it "does not return elements for which the block returns :_separator" do
|
|
e = EnumerableSpecs::Numerous.new(1, 2, 3, 3, 2, 1)
|
|
result = e.chunk { |x| x == 2 ? :_separator : 1 }.to_a
|
|
result.should == [[1, [1]], [1, [3, 3]], [1, [1]]]
|
|
end
|
|
|
|
it "does not return elements for which the block returns nil" do
|
|
e = EnumerableSpecs::Numerous.new(1, 2, 3, 2, 1)
|
|
result = e.chunk { |x| x == 2 ? nil : 1 }.to_a
|
|
result.should == [[1, [1]], [1, [3]], [1, [1]]]
|
|
end
|
|
|
|
it "raises a RuntimeError if the block returns a Symbol starting with an underscore other than :_alone or :_separator" do
|
|
e = EnumerableSpecs::Numerous.new(1, 2, 3, 2, 1)
|
|
lambda { e.chunk { |x| :_arbitrary }.to_a }.should raise_error(RuntimeError)
|
|
end
|
|
|
|
ruby_version_is ""..."2.3" do
|
|
describe "with [initial_state]" do
|
|
it "yields an element and an object value-equal but not identical to the object passed to #chunk" do
|
|
e = EnumerableSpecs::Numerous.new(1)
|
|
value = "value"
|
|
|
|
e.chunk(value) do |x, v|
|
|
x.should == 1
|
|
v.should == value
|
|
v.should_not equal(value)
|
|
end.to_a
|
|
end
|
|
|
|
it "does not yield the object passed to #chunk if it is nil" do
|
|
e = EnumerableSpecs::Numerous.new(1)
|
|
e.chunk(nil) { |*x| ScratchPad << x }.to_a
|
|
ScratchPad.recorded.should == [[1]]
|
|
end
|
|
end
|
|
end
|
|
|
|
ruby_version_is "2.3" do
|
|
it "does not accept arguments" do
|
|
e = EnumerableSpecs::Numerous.new(1, 2, 3)
|
|
lambda {
|
|
e.chunk(1) {}
|
|
}.should raise_error(ArgumentError)
|
|
end
|
|
end
|
|
|
|
it 'returned Enumerator size returns nil' do
|
|
e = EnumerableSpecs::NumerousWithSize.new(1, 2, 3, 2, 1)
|
|
enum = e.chunk { |x| true }
|
|
enum.size.should == nil
|
|
end
|
|
end
|