mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
1d15d5f080
* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
87 lines
2.6 KiB
Ruby
87 lines
2.6 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
|
|
require File.expand_path('../fixtures/classes', __FILE__)
|
|
|
|
describe "Array#last" do
|
|
it "returns the last element" do
|
|
[1, 1, 1, 1, 2].last.should == 2
|
|
end
|
|
|
|
it "returns nil if self is empty" do
|
|
[].last.should == nil
|
|
end
|
|
|
|
it "returns the last count elements if given a count" do
|
|
[1, 2, 3, 4, 5, 9].last(3).should == [4, 5, 9]
|
|
end
|
|
|
|
it "returns an empty array when passed a count on an empty array" do
|
|
[].last(0).should == []
|
|
[].last(1).should == []
|
|
end
|
|
|
|
it "returns an empty array when count == 0" do
|
|
[1, 2, 3, 4, 5].last(0).should == []
|
|
end
|
|
|
|
it "returns an array containing the last element when passed count == 1" do
|
|
[1, 2, 3, 4, 5].last(1).should == [5]
|
|
end
|
|
|
|
it "raises an ArgumentError when count is negative" do
|
|
lambda { [1, 2].last(-1) }.should raise_error(ArgumentError)
|
|
end
|
|
|
|
it "returns the entire array when count > length" do
|
|
[1, 2, 3, 4, 5, 9].last(10).should == [1, 2, 3, 4, 5, 9]
|
|
end
|
|
|
|
it "returns an array which is independent to the original when passed count" do
|
|
ary = [1, 2, 3, 4, 5]
|
|
ary.last(0).replace([1,2])
|
|
ary.should == [1, 2, 3, 4, 5]
|
|
ary.last(1).replace([1,2])
|
|
ary.should == [1, 2, 3, 4, 5]
|
|
ary.last(6).replace([1,2])
|
|
ary.should == [1, 2, 3, 4, 5]
|
|
end
|
|
|
|
it "properly handles recursive arrays" do
|
|
empty = ArraySpecs.empty_recursive_array
|
|
empty.last.should equal(empty)
|
|
|
|
array = ArraySpecs.recursive_array
|
|
array.last.should equal(array)
|
|
end
|
|
|
|
it "tries to convert the passed argument to an Integer usinig #to_int" do
|
|
obj = mock('to_int')
|
|
obj.should_receive(:to_int).and_return(2)
|
|
[1, 2, 3, 4, 5].last(obj).should == [4, 5]
|
|
end
|
|
|
|
it "raises a TypeError if the passed argument is not numeric" do
|
|
lambda { [1,2].last(nil) }.should raise_error(TypeError)
|
|
lambda { [1,2].last("a") }.should raise_error(TypeError)
|
|
|
|
obj = mock("nonnumeric")
|
|
lambda { [1,2].last(obj) }.should raise_error(TypeError)
|
|
end
|
|
|
|
it "does not return subclass instance on Array subclasses" do
|
|
ArraySpecs::MyArray[].last(0).should be_an_instance_of(Array)
|
|
ArraySpecs::MyArray[].last(2).should be_an_instance_of(Array)
|
|
ArraySpecs::MyArray[1, 2, 3].last(0).should be_an_instance_of(Array)
|
|
ArraySpecs::MyArray[1, 2, 3].last(1).should be_an_instance_of(Array)
|
|
ArraySpecs::MyArray[1, 2, 3].last(2).should be_an_instance_of(Array)
|
|
end
|
|
|
|
it "is not destructive" do
|
|
a = [1, 2, 3]
|
|
a.last
|
|
a.should == [1, 2, 3]
|
|
a.last(2)
|
|
a.should == [1, 2, 3]
|
|
a.last(3)
|
|
a.should == [1, 2, 3]
|
|
end
|
|
end
|