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require File.dirname(__FILE__) + "/../spec_helper"
describe "List Ruby extensions" do
before(:each) do
@data = ["foo", "quux", "bar", "aa"]
@list = java.util.ArrayList.new(@data)
end
it "should support index() with one argument" do
expect(@list.index("quux")).to eq(1)
end
it "should return nil on index() with one argument that does not exist" do
expect(@list.index(451)).to eq(nil)
end
it "should return nil on rindex() with one argument that does not exist" do
expect(@list.rindex(-24)).to eq(nil)
list = java.util.Stack.new
expect(list.rindex('foo')).to eq(nil)
expect(list.rindex(nil)).to eq(nil)
end
it "should support index() with a block" do
expect(@list.index{ |x| x == 'bar' }).to eq(2)
end
it "should support rindex() with a block" do
list = java.util.Vector.new @data; list << 'bar'; list << 'aa'
expect(list.rindex{ |x| x == 'bar' }).to eq(4)
end
it "should support index() with a block that does not exist" do
expect(@list.index{ |x| x == :nazgul }).to eq(nil)
end
it "should support index() with nil (not found)" do
expect(@list.index(nil)).to eq(nil)
end
it "should support rindex() with nil (not found)" do
expect(@list.rindex(nil)).to eq(nil)
end
it "should support index() with nil (found)" do
expect(java.util.LinkedList.new(["foo", "quux", nil, "bar", "aa"]).index(nil)).to eq(2)
end
it "should support rindex() with nil (found)" do
expect(java.util.ArrayList.new(["foo", "quux", nil, "bar", nil, "aa"]).rindex(nil)).to eq(4)
end
it "should support index() with no arguments" do
expect( @list.index.each { |x| x == "foo" } ).to eq(0)
end
it "should support index() with no arguments (not existing)" do
expect( @list.index.each { |x| x == ":-(" } ).to eq(nil)
end
it "should support rindex() with no arguments" do
list = java.util.Stack.new
list << 1; list << 2; list << 3; list << 1; list << 2; list << 3
expect( list.rindex.each { |x| x < 2 } ).to eq(3)
end
# Java 8 adds a single-parameter sort method to List that sorts in-place
# if ENV_JAVA['java.specification.version'] < '1.8'
# it "should be sortable with sort() without block" do
# expect(@list.sort.to_a).to eq(@data.sort)
# end
#
# it "should be sortable with sort() with block" do
# result = @list.sort do |a, b|
# a.length <=> b.length
# end
#
# expected = @data.sort do |a, b|
# a.length <=> b.length
# end
#
# expect(result.to_a).to eq(expected)
# end
# end
it "should be sortable with sort!() without block" do
list = java.util.LinkedList.new(@data)
list.sort!
expect(list.to_a).to eq(@data.sort)
end
it "should be sortable with sort!() with block" do
list = java.util.ArrayList.new(@data)
list.sort! do |a, b|
a.length <=> b.length
end
expected = @data.sort do |a, b|
a.length <=> b.length
end
expect(list.to_a).to eq(expected)
end
it 'returns same collection type as target on sort' do
list = java.util.Vector.new ['b','a']
# NOTE: collides with Java 8's sort :
java.util.Vector.class_eval { alias sort ruby_sort }
list = list.sort { |a, b| a.length <=> b.length }
expect( list ).to be_a java.util.Vector
expect( list.to_a ).to eq ['b','a']
list = java.util.LinkedList.new ['b','a','c']
# list = list.sort { |a, b| a <=> b }
sorted = list.ruby_sort { |a, b| a <=> b }
expect( sorted ).to be_a java.util.LinkedList
expect( sorted.to_a ).to eq ['a','b','c']
expect( sorted ).to_not be list
expect( java.util.ArrayList.new.ruby_sort ).to be_a java.util.ArrayList
end
it 'converts to_ary' do
list = java.util.LinkedList.new(@data)
expect(list.to_ary).to eq(@data)
list = java.util.ArrayList.new(@data)
list.sort!
expect(list.to_ary).to eq(@data.sort)
end
it 'reports list size/length' do
list = java.util.Vector.new(@data)
expect(list.length).to eq(@data.size)
expect(list.size).to eq(list.length)
expect( java.util.Collections.emptyList.length ).to eq 0
end
it '[] with 1 arg returns element like an Array' do
expect(@list[0]).to eq(@data[0])
expect(@list[3]).to eq(@data[3])
expect(@list[-1]).to eq(@data[-1])
expect(@list[11]).to eq(@data[11]) # nil
expect(@list[-9]).to eq(@data[-9]) # nil
end
it 'slices with 2 arguments like an Array' do
expect(@list[0,3].to_a).to eq(@data[0,3])
expect(@list[2,3].to_a).to eq(@data[2,3])
expect(@list[3,8].to_a).to eq(@data[3,8])
expect(@list[4,8].to_a).to eq(@data[4,8])
expect(@list[5,8]).to be nil
expect(@list[-1,1].to_a).to eq(@data[-1,1])
expect(@list[-2,3].to_a).to eq(@data[-2,3])
expect(@list[-5,3]).to be nil
expect(@list[0,0].empty?).to be true
end
it 'slices with a range argument like an Array' do
expect(@list[0..3].to_a).to eq(@data[0..3])
expect(@list[0...2].to_a).to eq(@data[0...2])
expect(@list[0..0].to_a).to eq(@data[0..0])
expect(@list[0...0].to_a).to eq(@data[0...0])
expect(@list[1...-1].to_a).to eq(@data[1...-1])
expect(@list[-2..-1].to_a).to eq(@data[-2..-1])
expect(@list[-2...-1].to_a).to eq(@data[-2...-1])
expect(@list[-4..-2].to_a).to eq(@data[-4..-2])
expect(@list[-4...8].to_a).to eq(@data[-4...8])
expect(@list[-5..-1]).to be nil
expect(@list[-5...-1]).to be nil
expect(@list[7..8]).to be nil
expect(@list[-2...-2].empty?).to be true
expect(@list[1...1].empty?).to be true
end
it 'slice returns a subList' do
expect(@list[0,3]).to be_a java.util.List
expect(@list[0,0]).to be_a java.util.List # empty
expect(@list[0..3]).to be_a java.util.List
expect(@list[-2...-2]).to be_a java.util.List # empty
end
it '[]= with 1 arg sets an element' do
list = java.util.Vector.new(@data)
list[0] = nil
expect( list.get(0) ).to be nil
list[-1] = -1
expect( list.get(list.size() - 1) ).to eq -1
list = java.util.LinkedList.new(@data)
list[0] = nil
expect( list.get(0) ).to be nil
list[-1] = -1
expect( list.get(list.size() - 1) ).to eq -1
end
it '[]= with arg gt than size adds and sets like an Array' do
list = java.util.LinkedList.new @data
list[5] = 5 # list.size == 4
expect( list.get(4) ).to be nil
expect( list.get(5) ).to eq 5
expect( list.size ).to eq 6
list = java.util.Stack.new
list[3] = 3; list[0] = 0
expect( list.to_a ).to eq [0, nil, nil, 3]
end
it 'supports (Array-like) first/last' do
expect( @list.first ).to eq 'foo'
list = java.util.ArrayList.new [1, 2, 3]
expect( list.first(2).to_a ).to eq [1, 2]
expect( list.first(1).to_a ).to eq [1]
expect( list.first(0).to_a ).to eq []
expect( list.first(5).to_a ).to eq [1, 2, 3]
# LinkedList does getList, unless we alias first ruby_first
expect( java.util.LinkedList.new.ruby_first ).to be nil
expect( java.util.LinkedList.new.ruby_last ).to be nil
list = java.util.LinkedList.new [1, 2, 3]
expect( list.ruby_last ).to eq 3
expect( java.util.Vector.new.last ).to be nil
expect( list.ruby_last(1).to_a ).to eq [3]
expect( list.ruby_last(2) ).to be_a java.util.List
expect( list.ruby_last(2).to_a ).to eq [2, 3]
expect( list.ruby_last(5).to_a ).to eq [1, 2, 3]
expect( list.ruby_last(0) ).to be_a java.util.List
end
it "should respect to_ary objects defined on iteration" do
class Pair
def initialize(a, b)
@a = a ; @b = b
end
def to_ary
[@a, @b]
end
end
java.util.ArrayList.new([Pair.new(:x, :y)]).each do |car, cdr|
expect(car).to eq(:x)
expect(cdr).to eq(:y)
end
end
end
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