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require_relative 'enumerable_enumeratorized'
describe :enumerable_collect, shared: true do
before :each do
ScratchPad.record []
end
it "returns a new array with the results of passing each element to block" do
entries = [0, 1, 3, 4, 5, 6]
numerous = EnumerableSpecs::Numerous.new(*entries)
numerous.send(@method) { |i| i % 2 }.should == [0, 1, 1, 0, 1, 0]
numerous.send(@method) { |i| i }.should == entries
end
it "passes through the values yielded by #each_with_index" do
[:a, :b].each_with_index.send(@method) { |x, i| ScratchPad << [x, i]; nil }
ScratchPad.recorded.should == [[:a, 0], [:b, 1]]
end
it "gathers initial args as elements when each yields multiple" do
multi = EnumerableSpecs::YieldsMulti.new
multi.send(@method) {|e| e}.should == [1,3,6]
end
it "only yields increasing values for a Range" do
(1..0).send(@method) { |x| x }.should == []
(1..1).send(@method) { |x| x }.should == [1]
(1..2).send(@method) { |x| x }.should == [1, 2]
end
it "returns an enumerator when no block given" do
enum = EnumerableSpecs::Numerous.new.send(@method)
enum.should be_an_instance_of(Enumerator)
enum.each { |i| -i }.should == [-2, -5, -3, -6, -1, -4]
end
it "reports the same arity as the given block" do
entries = [0, 1, 3, 4, 5, 6]
numerous = EnumerableSpecs::Numerous.new(*entries)
def numerous.each(&block)
ScratchPad << block.arity
super
end
numerous.send(@method) { |a, b| a % 2 }.should == [0, 1, 1, 0, 1, 0]
ScratchPad.recorded.should == [2]
ScratchPad.clear
ScratchPad.record []
numerous.send(@method) { |i| i }.should == entries
ScratchPad.recorded.should == [1]
end
it "yields an Array of 2 elements for a Hash when block arity is 1" do
c = Class.new do
def register(a)
ScratchPad << a
end
end
m = c.new.method(:register)
ScratchPad.record []
{ 1 => 'a', 2 => 'b' }.map(&m)
ScratchPad.recorded.should == [[1, 'a'], [2, 'b']]
end
it "yields 2 arguments for a Hash when block arity is 2" do
c = Class.new do
def register(a, b)
ScratchPad << [a, b]
end
end
m = c.new.method(:register)
ScratchPad.record []
{ 1 => 'a', 2 => 'b' }.map(&m)
ScratchPad.recorded.should == [[1, 'a'], [2, 'b']]
end
it "raises an error for a Hash when an arity enforcing block of arity >2 is passed in" do
c = Class.new do
def register(a, b, c)
end
end
m = c.new.method(:register)
-> do
{ 1 => 'a', 2 => 'b' }.map(&m)
end.should raise_error(ArgumentError)
end
it "calls the each method on sub-classes" do
c = Class.new(Hash) do
def each
ScratchPad << 'in each'
super
end
end
h = c.new
h[1] = 'a'
ScratchPad.record []
h.send(@method) { |k,v| v }
ScratchPad.recorded.should == ['in each']
end
it_should_behave_like :enumerable_enumeratorized_with_origin_size
end
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