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Contents
describe "Array#shift" do
it "removes and returns the first element" do
a = [5, 1, 1, 5, 4]
a.shift.should == 5
a.should == [1, 1, 5, 4]
a.shift.should == 1
a.should == [1, 5, 4]
a.shift.should == 1
a.should == [5, 4]
a.shift.should == 5
a.should == [4]
a.shift.should == 4
a.should == []
end
it "returns nil whent the array is empty" do
[].shift.should == nil
end
describe "passed a number n as an argument" do
it "removes and returns an array with the first n element of the array" do
a = [1, 2, 3, 4, 5, 6]
a.shift(0).should == []
a.should == [1, 2, 3, 4, 5, 6]
a.shift(1).should == [1]
a.should == [2, 3, 4, 5, 6]
a.shift(2).should == [2, 3]
a.should == [4, 5, 6]
a.shift(3).should == [4, 5, 6]
a.should == []
end
it "does not corrupt the array when shift without arguments is followed by shift with an argument" do
a = [1, 2, 3, 4, 5]
a.shift.should == 1
a.shift(3).should == [2, 3, 4]
a.should == [5]
end
it "returns whole elements if n exceeds size of the array" do
a = [1, 2, 3, 4, 5]
a.shift(6).should == [1, 2, 3, 4, 5]
a.should == []
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems