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require_relative '../../spec_helper'
require_relative '../enumerable/shared/enumeratorized'
describe "Range#each" do
it "passes each element to the given block by using #succ" do
a = []
(-5..5).each { |i| a << i }
a.should == [-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5]
a = []
('A'..'D').each { |i| a << i }
a.should == ['A','B','C','D']
a = []
('A'...'D').each { |i| a << i }
a.should == ['A','B','C']
a = []
(0xfffd...0xffff).each { |i| a << i }
a.should == [0xfffd, 0xfffe]
y = mock('y')
x = mock('x')
x.should_receive(:<=>).with(y).any_number_of_times.and_return(-1)
x.should_receive(:<=>).with(x).any_number_of_times.and_return(0)
x.should_receive(:succ).any_number_of_times.and_return(y)
y.should_receive(:<=>).with(x).any_number_of_times.and_return(1)
y.should_receive(:<=>).with(y).any_number_of_times.and_return(0)
a = []
(x..y).each { |i| a << i }
a.should == [x, y]
end
it "works for non-ASCII ranges" do
a = []
('Σ'..'Ω').each { |i| a << i }
a.should == ["Σ", "Τ", "Υ", "Φ", "Χ", "Ψ", "Ω"]
end
it "works with endless ranges" do
a = []
(-2..).each { |x| break if x > 2; a << x }
a.should == [-2, -1, 0, 1, 2]
a = []
(-2...).each { |x| break if x > 2; a << x }
a.should == [-2, -1, 0, 1, 2]
end
it "works with String endless ranges" do
a = []
('A'..).each { |x| break if x > "D"; a << x }
a.should == ["A", "B", "C", "D"]
a = []
('A'...).each { |x| break if x > "D"; a << x }
a.should == ["A", "B", "C", "D"]
end
it "raises a TypeError beginless ranges" do
-> { (..2).each { |x| x } }.should raise_error(TypeError)
end
it "raises a TypeError if the first element does not respond to #succ" do
-> { (0.5..2.4).each { |i| i } }.should raise_error(TypeError)
b = mock('x')
(a = mock('1')).should_receive(:<=>).with(b).and_return(1)
-> { (a..b).each { |i| i } }.should raise_error(TypeError)
end
it "returns self" do
range = 1..10
range.each{}.should equal(range)
end
it "returns an enumerator when no block given" do
enum = (1..3).each
enum.should be_an_instance_of(Enumerator)
enum.to_a.should == [1, 2, 3]
end
it "supports Time objects that respond to #succ" do
t = Time.utc(1970)
def t.succ; self + 1 end
t_succ = t.succ
def t_succ.succ; self + 1; end
(t..t_succ).to_a.should == [Time.utc(1970), Time.utc(1970, nil, nil, nil, nil, 1)]
(t...t_succ).to_a.should == [Time.utc(1970)]
end
it "passes each Symbol element by using #succ" do
(:aa..:ac).each.to_a.should == [:aa, :ab, :ac]
(:aa...:ac).each.to_a.should == [:aa, :ab]
end
it_behaves_like :enumeratorized_with_origin_size, :each, (1..3)
end
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