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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/enumeratorize'
require_relative 'shared/delete_if'
require_relative '../enumerable/shared/enumeratorized'
describe "Array#reject" do
it "returns a new array without elements for which block is true" do
ary = [1, 2, 3, 4, 5]
ary.reject { true }.should == []
ary.reject { false }.should == ary
ary.reject { false }.should_not equal ary
ary.reject { nil }.should == ary
ary.reject { nil }.should_not equal ary
ary.reject { 5 }.should == []
ary.reject { |i| i < 3 }.should == [3, 4, 5]
ary.reject { |i| i % 2 == 0 }.should == [1, 3, 5]
end
it "returns self when called on an Array emptied with #shift" do
array = [1]
array.shift
array.reject { |x| true }.should == []
end
it "properly handles recursive arrays" do
empty = ArraySpecs.empty_recursive_array
empty.reject { false }.should == [empty]
empty.reject { true }.should == []
array = ArraySpecs.recursive_array
array.reject { false }.should == [1, 'two', 3.0, array, array, array, array, array]
array.reject { true }.should == []
end
it "does not return subclass instance on Array subclasses" do
ArraySpecs::MyArray[1, 2, 3].reject { |x| x % 2 == 0 }.should be_an_instance_of(Array)
end
it "does not retain instance variables" do
array = []
array.instance_variable_set("@variable", "value")
array.reject { false }.instance_variable_get("@variable").should == nil
end
it_behaves_like :enumeratorize, :reject
it_behaves_like :enumeratorized_with_origin_size, :reject, [1,2,3]
end
describe "Array#reject!" do
it "removes elements for which block is true" do
a = [3, 4, 5, 6, 7, 8, 9, 10, 11]
a.reject! { |i| i % 2 == 0 }.should equal(a)
a.should == [3, 5, 7, 9, 11]
a.reject! { |i| i > 8 }
a.should == [3, 5, 7]
a.reject! { |i| i < 4 }
a.should == [5, 7]
a.reject! { |i| i == 5 }
a.should == [7]
a.reject! { true }
a.should == []
a.reject! { true }
a.should == []
end
it "properly handles recursive arrays" do
empty = ArraySpecs.empty_recursive_array
empty_dup = empty.dup
empty.reject! { false }.should == nil
empty.should == empty_dup
empty = ArraySpecs.empty_recursive_array
empty.reject! { true }.should == []
empty.should == []
array = ArraySpecs.recursive_array
array_dup = array.dup
array.reject! { false }.should == nil
array.should == array_dup
array = ArraySpecs.recursive_array
array.reject! { true }.should == []
array.should == []
end
it "returns nil when called on an Array emptied with #shift" do
array = [1]
array.shift
array.reject! { |x| true }.should == nil
end
it "returns nil if no changes are made" do
a = [1, 2, 3]
a.reject! { |i| i < 0 }.should == nil
a.reject! { true }
a.reject! { true }.should == nil
end
it "returns an Enumerator if no block given, and the array is frozen" do
ArraySpecs.frozen_array.reject!.should be_an_instance_of(Enumerator)
end
it "raises a #{frozen_error_class} on a frozen array" do
-> { ArraySpecs.frozen_array.reject! {} }.should raise_error(frozen_error_class)
end
it "raises a #{frozen_error_class} on an empty frozen array" do
-> { ArraySpecs.empty_frozen_array.reject! {} }.should raise_error(frozen_error_class)
end
it "does not truncate the array is the block raises an exception" do
a = [1, 2, 3]
begin
a.reject! { raise StandardError, 'Oops' }
rescue
end
a.should == [1, 2, 3]
end
it "only removes elements for which the block returns true, keeping the element which raised an error." do
a = [1, 2, 3, 4]
begin
a.reject! do |x|
case x
when 2 then true
when 3 then raise StandardError, 'Oops'
else false
end
end
rescue StandardError
end
a.should == [1, 3, 4]
end
it_behaves_like :enumeratorize, :reject!
it_behaves_like :enumeratorized_with_origin_size, :reject!, [1,2,3]
it_behaves_like :delete_if, :reject!
end
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