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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Array#sort" do
it "returns a new array sorted based on comparing elements with <=>" do
a = [1, -2, 3, 9, 1, 5, -5, 1000, -5, 2, -10, 14, 6, 23, 0]
a.sort.should == [-10, -5, -5, -2, 0, 1, 1, 2, 3, 5, 6, 9, 14, 23, 1000]
end
it "does not affect the original Array" do
a = [0, 15, 2, 3, 4, 6, 14, 5, 7, 12, 8, 9, 1, 10, 11, 13]
b = a.sort
a.should == [0, 15, 2, 3, 4, 6, 14, 5, 7, 12, 8, 9, 1, 10, 11, 13]
b.should == (0..15).to_a
end
it "sorts already-sorted Arrays" do
(0..15).to_a.sort.should == (0..15).to_a
end
it "sorts reverse-sorted Arrays" do
(0..15).to_a.reverse.sort.should == (0..15).to_a
end
it "sorts Arrays that consist entirely of equal elements" do
a = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
a.sort.should == a
b = Array.new(15).map { ArraySpecs::SortSame.new }
b.sort.should == b
end
it "sorts Arrays that consist mostly of equal elements" do
a = [1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1]
a.sort.should == [0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
end
it "does not return self even if the array would be already sorted" do
a = [1, 2, 3]
sorted = a.sort
sorted.should == a
sorted.should_not equal(a)
end
it "properly handles recursive arrays" do
empty = ArraySpecs.empty_recursive_array
empty.sort.should == empty
array = [[]]; array << array
array.sort.should == [[], array]
end
it "uses #<=> of elements in order to sort" do
a = ArraySpecs::MockForCompared.new
b = ArraySpecs::MockForCompared.new
c = ArraySpecs::MockForCompared.new
ArraySpecs::MockForCompared.compared?.should == false
[a, b, c].sort.should == [c, b, a]
ArraySpecs::MockForCompared.compared?.should == true
end
it "does not deal with exceptions raised by unimplemented or incorrect #<=>" do
o = Object.new
lambda { [o, 1].sort }.should raise_error
end
it "may take a block which is used to determine the order of objects a and b described as -1, 0 or +1" do
a = [5, 1, 4, 3, 2]
a.sort.should == [1, 2, 3, 4, 5]
a.sort {|x, y| y <=> x}.should == [5, 4, 3, 2, 1]
end
it "does not call #<=> on contained objects when invoked with a block" do
a = Array.new(25)
(0...25).each {|i| a[i] = ArraySpecs::UFOSceptic.new }
a.sort { -1 }.should be_kind_of(Array)
end
it "does not call #<=> on elements when invoked with a block even if Array is large (Rubinius #412)" do
a = Array.new(1500)
(0...1500).each {|i| a[i] = ArraySpecs::UFOSceptic.new }
a.sort { -1 }.should be_kind_of(Array)
end
it "completes when supplied a block that always returns the same result" do
a = [2, 3, 5, 1, 4]
a.sort { 1 }.should be_kind_of(Array)
a.sort { 0 }.should be_kind_of(Array)
a.sort { -1 }.should be_kind_of(Array)
end
it "does not freezes self during being sorted" do
a = [1, 2, 3]
a.sort { |x,y| a.frozen?.should == false; x <=> y }
end
it "returns the specified value when it would break in the given block" do
[1, 2, 3].sort{ break :a }.should == :a
end
it "compares values returned by block with 0" do
a = [1, 2, 5, 10, 7, -4, 12]
a.sort { |n, m| n - m }.should == [-4, 1, 2, 5, 7, 10, 12]
a.sort { |n, m|
ArraySpecs::ComparableWithFixnum.new(n-m)
}.should == [-4, 1, 2, 5, 7, 10, 12]
lambda {
a.sort { |n, m| (n - m).to_s }
}.should raise_error(ArgumentError)
end
it "raises an error if objects can't be compared" do
a=[ArraySpecs::Uncomparable.new, ArraySpecs::Uncomparable.new]
lambda {a.sort}.should raise_error(ArgumentError)
end
# From a strange Rubinius bug
it "handles a large array that has been pruned" do
pruned = ArraySpecs::LargeArray.dup.delete_if { |n| n !~ /^test./ }
pruned.sort.should == ArraySpecs::LargeTestArraySorted
end
ruby_version_is "" ... "1.9.3" do
it "returns subclass instance on Array subclasses" do
ary = ArraySpecs::MyArray[1, 2, 3]
ary.sort.should be_kind_of(ArraySpecs::MyArray)
end
end
ruby_version_is "1.9.3" do
it "does not return subclass instance on Array subclasses" do
ary = ArraySpecs::MyArray[1, 2, 3]
ary.sort.should be_kind_of(Array)
end
end
end
describe "Array#sort!" do
it "sorts array in place using <=>" do
a = [1, -2, 3, 9, 1, 5, -5, 1000, -5, 2, -10, 14, 6, 23, 0]
a.sort!
a.should == [-10, -5, -5, -2, 0, 1, 1, 2, 3, 5, 6, 9, 14, 23, 1000]
end
it "sorts array in place using block value if a block given" do
a = [0, 15, 2, 3, 4, 6, 14, 5, 7, 12, 8, 9, 1, 10, 11, 13]
a.sort! { |x, y| y <=> x }.should == (0..15).to_a.reverse
end
it "returns self if the order of elements changed" do
a = [6, 7, 2, 3, 7]
a.sort!.should equal(a)
a.should == [2, 3, 6, 7, 7]
end
it "returns self even if makes no modification" do
a = [1, 2, 3, 4, 5]
a.sort!.should equal(a)
a.should == [1, 2, 3, 4, 5]
end
it "properly handles recursive arrays" do
empty = ArraySpecs.empty_recursive_array
empty.sort!.should == empty
array = [[]]; array << array
array.sort!.should == array
end
it "uses #<=> of elements in order to sort" do
a = ArraySpecs::MockForCompared.new
b = ArraySpecs::MockForCompared.new
c = ArraySpecs::MockForCompared.new
ArraySpecs::MockForCompared.compared?.should == false
[a, b, c].sort!.should == [c, b, a]
ArraySpecs::MockForCompared.compared?.should == true
end
it "does not call #<=> on contained objects when invoked with a block" do
a = Array.new(25)
(0...25).each {|i| a[i] = ArraySpecs::UFOSceptic.new }
a.sort! { -1 }.should be_kind_of(Array)
end
it "does not call #<=> on elements when invoked with a block even if Array is large (Rubinius #412)" do
a = Array.new(1500)
(0...1500).each {|i| a[i] = ArraySpecs::UFOSceptic.new }
a.sort! { -1 }.should be_kind_of(Array)
end
it "completes when supplied a block that always returns the same result" do
a = [2, 3, 5, 1, 4]
a.sort!{ 1 }.should be_kind_of(Array)
a.sort!{ 0 }.should be_kind_of(Array)
a.sort!{ -1 }.should be_kind_of(Array)
end
ruby_version_is '' ... '1.9' do
it "raises a TypeError on a frozen array" do
lambda { ArraySpecs.frozen_array.sort! }.should raise_error(TypeError)
end
not_compliant_on :rubinius do
it "temporarily freezes self and recovers after sorted" do
a = [1, 2, 3]
a.sort! { |x,y| a.frozen?.should == true; x <=> y }
a.frozen?.should == false
end
end
end
ruby_version_is '1.9' do
it "raises a RuntimeError on a frozen array" do
lambda { ArraySpecs.frozen_array.sort! }.should raise_error(RuntimeError)
end
it "ignores any changes of self which would take place during sort!ing" do
a = [3, 2, 1]
a.sort! {|x,y| a << 4; a.should include(4); x <=> y }
a.should == [1, 2, 3]
a = [3, 2, 1]
a.sort! {|x,y| a.replace([:a, :b, :c, :d, :e]); x <=> y}
a.should == [1, 2, 3]
end
end
it "returns the specified value when it would break in the given block" do
[1, 2, 3].sort{ break :a }.should == :a
end
it "makes some modification even if finished sorting when it would break in the given block" do
partially_sorted = (1..5).map{|i|
ary = [5, 4, 3, 2, 1]
ary.sort!{|x,y| break if x==i; x<=>y}
ary
}
partially_sorted.any?{|ary| ary != [1, 2, 3, 4, 5]}.should be_true
end
end
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