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require "spec"
require "set"
require "spec/helpers/iterate"
describe "Set" do
describe "an empty set" do
it "is empty" do
Set(Nil).new.empty?.should be_true
end
it "has size 0" do
Set(Nil).new.size.should eq(0)
end
end
describe "new" do
it "creates new set with enumerable without block" do
set_from_array = Set.new([2, 4, 6, 4])
set_from_array.size.should eq(3)
set_from_array.to_a.sort.should eq([2, 4, 6])
set_from_tuple = Set.new({1, "hello", 'x'})
set_from_tuple.size.should eq(3)
set_from_tuple.to_a.should contain(1)
set_from_tuple.to_a.should contain("hello")
set_from_tuple.to_a.should contain('x')
end
end
describe "add" do
it "adds and includes" do
set = Set(Int32).new
set.add 1
set.includes?(1).should be_true
set.size.should eq(1)
end
it "returns self" do
set = Set(Int32).new
set.add(1).should be(set)
end
end
describe "add?" do
it "returns true when object is not in the set" do
set = Set(Int32).new
set.add?(1).should be_true
end
it "returns false when object is in the set" do
set = Set(Int32).new
set.add?(1).should be_true
set.should contain(1)
set.add?(1).should be_false
end
end
describe "delete" do
it "deletes an object" do
set = Set{1, 2, 3}
set.delete 2
set.size.should eq(2)
set.should contain(1)
set.should contain(3)
end
it "returns true when the object was present" do
set = Set{1, 2, 3}
set.delete(2).should be_true
end
it "returns false when the object was absent" do
set = Set{1, 2, 3}
set.delete(0).should be_false
end
end
describe "dup" do
it "creates a dup" do
set1 = Set{[1, 2]}
set2 = set1.dup
set1.should eq(set2)
set1.should_not be(set2)
set1.to_a.first.should be(set2.to_a.first)
set1 << [3]
set2 << [4]
set2.should eq(Set{[1, 2], [4]})
end
end
describe "clone" do
it "creates a clone" do
set1 = Set{[1, 2]}
set2 = set1.clone
set1.should eq(set2)
set1.should_not be(set2)
set1.to_a.first.should_not be(set2.to_a.first)
set1 << [3]
set2 << [4]
set2.should eq(Set{[1, 2], [4]})
end
end
describe "==" do
it "compares two sets" do
set1 = Set{1, 2, 3}
set2 = Set{1, 2, 3}
set3 = Set{1, 2, 3, 4}
set1.should eq(set1)
set1.should eq(set2)
set1.should_not eq(set3)
end
end
describe "concat" do
it "adds all the other elements" do
set = Set{1, 4, 8}
set.concat [1, 9, 10]
set.should eq(Set{1, 4, 8, 9, 10})
end
it "returns self" do
set = Set{1, 4, 8}
set.concat([1, 9, 10]).should be(set)
end
end
it "does &" do
set1 = Set{1, 2, 3}
set2 = Set{4, 2, 5, 3}
set3 = set1 & set2
set3.should eq(Set{2, 3})
end
it "does |" do
set1 = Set{1, 2, 3}
set2 = Set{4, 2, 5, "3"}
set3 = set1 | set2
set3.should eq(Set{1, 2, 3, 4, 5, "3"})
end
it "aliases + to |" do
set1 = Set{1, 1, 2, 3}
set2 = Set{3, 4, 5}
set3 = set1 + set2
set4 = set1 | set2
set3.should eq(set4)
end
it "does -" do
set1 = Set{1, 2, 3, 4, 5}
set2 = Set{2, 4, 6}
set3 = set1 - set2
set3.should eq(Set{1, 3, 5})
end
it "does -" do
set1 = Set{1, 2, 3, 4, 5}
set2 = Set{2, 4, 'a'}
set3 = set1 - set2
set3.should eq(Set{1, 3, 5})
end
it "does -" do
set1 = Set{1, 2, 3, 4, 'b'}
set2 = Set{2, 4, 5}
set3 = set1 - set2
set3.should eq(Set{1, 3, 'b'})
end
it "does -" do
set1 = Set{1, 2, 3, 4, 5}
set2 = [2, 4, 6]
set3 = set1 - set2
set3.should eq(Set{1, 3, 5})
end
it "does -" do
set1 = Set{1, 2, 3, 4, 5}
set2 = [2, 4, 'a']
set3 = set1 - set2
set3.should eq(Set{1, 3, 5})
end
it "does -" do
set1 = Set{1, 2, 3, 4, 'b'}
set2 = [2, 4, 5]
set3 = set1 - set2
set3.should eq(Set{1, 3, 'b'})
end
it "does ^" do
set1 = Set{1, 2, 3, 4, 5}
set2 = Set{2, 4, 6}
set3 = set1 ^ set2
set3.should eq(Set{1, 3, 5, 6})
end
it "does ^" do
set1 = Set{1, 2, 3, 4, 5}
set2 = Set{2, 4, 'a'}
set3 = set1 ^ set2
set3.should eq(Set{1, 3, 5, 'a'})
end
it "does ^" do
set1 = Set{1, 2, 3, 4, 'b'}
set2 = Set{2, 4, 5}
set3 = set1 ^ set2
set3.should eq(Set{1, 3, 5, 'b'})
end
it "does ^" do
set1 = Set{1, 2, 3, 4, 5}
set2 = [2, 4, 6]
set3 = set1 ^ set2
set3.should eq(Set{1, 3, 5, 6})
end
it "does ^" do
set1 = Set{1, 2, 3, 4, 5}
set2 = [2, 4, 'a']
set3 = set1 ^ set2
set3.should eq(Set{1, 3, 5, 'a'})
end
it "does ^" do
set1 = Set{1, 2, 3, 4, 'b'}
set2 = [2, 4, 5]
set3 = set1 ^ set2
set3.should eq(Set{1, 3, 5, 'b'})
end
it "does subtract" do
set1 = Set{1, 2, 3, 4, 5}
set2 = Set{2, 4, 6}
set1.subtract set2
set1.should eq(Set{1, 3, 5})
end
it "does subtract" do
set1 = Set{1, 2, 3, 4, 5}
set2 = Set{2, 4, 'a'}
set1.subtract set2
set1.should eq(Set{1, 3, 5})
end
it "does subtract" do
set1 = Set{1, 2, 3, 4, 'b'}
set2 = Set{2, 4, 5}
set1.subtract set2
set1.should eq(Set{1, 3, 'b'})
end
it "does subtract" do
set1 = Set{1, 2, 3, 4, 5}
set2 = [2, 4, 6]
set1.subtract set2
set1.should eq(Set{1, 3, 5})
end
it "does subtract" do
set1 = Set{1, 2, 3, 4, 5}
set2 = [2, 4, 'a']
set1.subtract set2
set1.should eq(Set{1, 3, 5})
end
it "does subtract" do
set1 = Set{1, 2, 3, 4, 'b'}
set2 = [2, 4, 5]
set1.subtract set2
set1.should eq(Set{1, 3, 'b'})
end
it "does to_a" do
Set{1, 2, 3}.to_a.should eq([1, 2, 3])
end
it "does support giving a block to to_a" do
Set{1, 2, 3}.to_a { |x| x + 1 }.should eq([2, 3, 4])
end
it "does to_s" do
Set{1, 2, 3}.to_s.should eq("Set{1, 2, 3}")
Set{"foo"}.to_s.should eq(%(Set{"foo"}))
end
it "does clear" do
x = Set{1, 2, 3}
x.to_a.should eq([1, 2, 3])
x.clear.should be(x)
x << 1
x.to_a.should eq([1])
end
it "checks intersects" do
set = Set{3, 4, 5}
empty_set = Set(Int32).new
set.intersects?(set).should be_true
set.intersects?(Set{2, 4}).should be_true
set.intersects?(Set{5, 6, 7}).should be_true
set.intersects?(Set{1, 2, 6, 8, 4}).should be_true
set.intersects?(empty_set).should be_false
set.intersects?(Set{0, 2}).should be_false
set.intersects?(Set{0, 2, 6}).should be_false
set.intersects?(Set{0, 2, 6, 8, 10}).should be_false
# Make sure set hasn't changed
set.should eq(Set{3, 4, 5})
end
it "compares hashes of sets" do
h1 = {Set{1, 2, 3} => 1}
h2 = {Set{1, 2, 3} => 1}
h1.should eq(h2)
end
it "does each" do
set = Set{1, 2, 3}
i = 1
set.each do |v|
v.should eq(i)
i += 1
end.should be_nil
i.should eq(4)
end
it_iterates "#each", [1, 2, 3], Set{1, 2, 3}.each
it "#subset_of?" do
set = Set{1, 2, 3}
empty_set = Set(Int32).new
set.subset_of?(Set{1, 2, 3, 4}).should be_true
set.subset_of?(Set{1, 2, 3, "4"}).should be_true
set.subset_of?(Set{1, 2, 3}).should be_true
set.subset_of?(Set{1, 2}).should be_false
set.subset_of?(empty_set).should be_false
empty_set.subset_of?(Set{1}).should be_true
empty_set.subset_of?(empty_set).should be_true
end
it "#proper_subset_of?" do
set = Set{1, 2, 3}
empty_set = Set(Int32).new
set.proper_subset_of?(Set{1, 2, 3, 4}).should be_true
set.proper_subset_of?(Set{1, 2, 3, "4"}).should be_true
set.proper_subset_of?(Set{1, 2, 3}).should be_false
set.proper_subset_of?(Set{1, 2}).should be_false
set.proper_subset_of?(empty_set).should be_false
empty_set.proper_subset_of?(Set{1}).should be_true
empty_set.proper_subset_of?(empty_set).should be_false
end
it "#superset_of?" do
set = Set{1, 2, "3"}
empty_set = Set(Int32).new
set.superset_of?(empty_set).should be_true
set.superset_of?(Set{1, 2}).should be_true
set.superset_of?(Set{1, 2, "3"}).should be_true
set.superset_of?(Set{1, 2, 3}).should be_false
set.superset_of?(Set{1, 2, 3, 4}).should be_false
set.superset_of?(Set{1, 4}).should be_false
empty_set.superset_of?(empty_set).should be_true
end
it "#proper_superset_of?" do
set = Set{1, 2, "3"}
empty_set = Set(Int32).new
set.proper_superset_of?(empty_set).should be_true
set.proper_superset_of?(Set{1, 2}).should be_true
set.proper_superset_of?(Set{1, 2, "3"}).should be_false
set.proper_superset_of?(Set{1, 2, 3}).should be_false
set.proper_superset_of?(Set{1, 2, 3, 4}).should be_false
set.proper_superset_of?(Set{1, 4}).should be_false
empty_set.proper_superset_of?(empty_set).should be_false
end
it "has object_id" do
Set(Int32).new.object_id.should be > 0
end
typeof(Set(Int32).new(initial_capacity: 1234))
describe "compare_by_identity" do
it "compares by identity" do
string = "foo"
set = Set{string, "bar", "baz"}
set.compare_by_identity?.should be_false
set.should contain(string)
set.compare_by_identity
set.compare_by_identity?.should be_true
set.should_not contain("fo" + "o")
set.should contain(string)
end
it "retains compare_by_identity on dup" do
set = Set(String).new.compare_by_identity
set.dup.compare_by_identity?.should be_true
end
it "retains compare_by_identity on clone" do
set = Set(String).new.compare_by_identity
set.clone.compare_by_identity?.should be_true
end
end
describe "#rehash" do
it "rehashes" do
a = [1]
s = Set{a}
(10..100).each do |i|
s << [i]
end
a << 2
s.should_not contain(a)
s.rehash
s.should contain(a)
end
end
end
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