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Contents
require File.dirname(File.join(__rhoGetCurrentDir(), __FILE__)) + '/../../spec_helper'
require File.dirname(File.join(__rhoGetCurrentDir(), __FILE__)) + '/fixtures/classes'
describe "Enumerable#sort" do
it "sorts by the natural order as defined by <=> " do
EnumerableSpecs::Numerous.new.sort.should == [1, 2, 3, 4, 5, 6]
sorted = EnumerableSpecs::ComparesByVowelCount.wrap("a" * 1, "a" * 2, "a"*3, "a"*4, "a"*5)
EnumerableSpecs::Numerous.new(sorted[2],sorted[0],sorted[1],sorted[3],sorted[4]).sort.should == sorted
end
it "yields elements to the provided block" do
EnumerableSpecs::Numerous.new.sort { |a, b| b <=> a }.should == [6, 5, 4, 3, 2, 1]
EnumerableSpecs::Numerous.new(2,0,1,3,4).sort { |n, m| -(n <=> m) }.should == [4,3,2,1,0]
end
it "sort should throw a NoMethodError if elements do not define <=>" do
lambda {
EnumerableSpecs::Numerous.new(Object.new, Object.new, Object.new).sort
}.should raise_error(NoMethodError)
end
it "sorts enumerables that contain nils" do
arr = EnumerableSpecs::Numerous.new(nil, true, nil, false, nil, true, nil, false, nil)
arr.sort { |a, b|
x = a ? -1 : a.nil? ? 0 : 1
y = b ? -1 : b.nil? ? 0 : 1
x <=> y
}.should == [true, true, nil, nil, nil, nil, nil, false, false]
end
it "compare values returned by block with 0" do
EnumerableSpecs::Numerous.new.sort { |n, m| -(n+m) * (n <=> m) }.should == [6, 5, 4, 3, 2, 1]
EnumerableSpecs::Numerous.new.sort { |n, m|
EnumerableSpecs::ComparableWithFixnum.new(-(n+m) * (n <=> m))
}.should == [6, 5, 4, 3, 2, 1]
lambda {
EnumerableSpecs::Numerous.new.sort { |n, m| (n <=> m).to_s }
}.should raise_error(ArgumentError)
end
end
Version data entries
83 entries across 83 versions & 1 rubygems