ruby--ruby/spec/ruby/core/integer/times_spec.rb

require File.expand_path('../../../spec_helper', __FILE__)

describe "Integer#times" do
  it "returns self" do
    5.times {}.should == 5
    9.times {}.should == 9
    9.times { |n| n - 2 }.should == 9
  end

  it "yields each value from 0 to self - 1" do
    a = []
    9.times { |i| a << i }
    -2.times { |i| a << i }
    a.should == [0, 1, 2, 3, 4, 5, 6, 7, 8]
  end

  it "skips the current iteration when encountering 'next'" do
    a = []
    3.times do |i|
      next if i == 1
      a << i
    end
    a.should == [0, 2]
  end

  it "skips all iterations when encountering 'break'" do
    a = []
    5.times do |i|
      break if i == 3
      a << i
    end
    a.should == [0, 1, 2]
  end

  it "skips all iterations when encountering break with an argument and returns that argument" do
    9.times { break 2 }.should == 2
  end

  it "executes a nested while loop containing a break expression" do
    a = [false]
    b = 1.times do |i|
      while true
        a.shift or break
      end
    end
    a.should == []
    b.should == 1
  end

  it "executes a nested #times" do
    a = 0
    b = 3.times do |i|
      2.times { a += 1 }
    end
    a.should == 6
    b.should == 3
  end

  it "returns an Enumerator" do
    result = []

    enum = 3.times
    enum.each { |i| result << i }

    result.should == [0, 1, 2]
  end

  describe "when no block is given" do
    describe "returned Enumerator" do
      describe "size" do
        it "returns self" do
          5.times.size.should == 5
          10.times.size.should == 10
          0.times.size.should == 0
        end
      end
    end
  end
end