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401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
97 lines
3.2 KiB
Ruby
97 lines
3.2 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "Array#<=>" do
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it "calls <=> left to right and return first non-0 result" do
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[-1, +1, nil, "foobar"].each do |result|
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lhs = Array.new(3) { mock("#{result}") }
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rhs = Array.new(3) { mock("#{result}") }
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lhs[0].should_receive(:<=>).with(rhs[0]).and_return(0)
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lhs[1].should_receive(:<=>).with(rhs[1]).and_return(result)
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lhs[2].should_not_receive(:<=>)
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(lhs <=> rhs).should == result
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end
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end
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it "returns 0 if the arrays are equal" do
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([] <=> []).should == 0
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([1, 2, 3, 4, 5, 6] <=> [1, 2, 3, 4, 5.0, 6.0]).should == 0
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end
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it "returns -1 if the array is shorter than the other array" do
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([] <=> [1]).should == -1
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([1, 1] <=> [1, 1, 1]).should == -1
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end
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it "returns +1 if the array is longer than the other array" do
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([1] <=> []).should == +1
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([1, 1, 1] <=> [1, 1]).should == +1
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end
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it "returns -1 if the arrays have same length and a pair of corresponding elements returns -1 for <=>" do
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eq_l = mock('an object equal to the other')
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eq_r = mock('an object equal to the other')
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eq_l.should_receive(:<=>).with(eq_r).any_number_of_times.and_return(0)
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less = mock('less than the other')
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greater = mock('greater then the other')
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less.should_receive(:<=>).with(greater).any_number_of_times.and_return(-1)
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rest = mock('an rest element of the arrays')
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rest.should_receive(:<=>).with(rest).any_number_of_times.and_return(0)
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lhs = [eq_l, eq_l, less, rest]
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rhs = [eq_r, eq_r, greater, rest]
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(lhs <=> rhs).should == -1
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end
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it "returns +1 if the arrays have same length and a pair of corresponding elements returns +1 for <=>" do
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eq_l = mock('an object equal to the other')
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eq_r = mock('an object equal to the other')
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eq_l.should_receive(:<=>).with(eq_r).any_number_of_times.and_return(0)
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greater = mock('greater then the other')
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less = mock('less than the other')
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greater.should_receive(:<=>).with(less).any_number_of_times.and_return(+1)
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rest = mock('an rest element of the arrays')
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rest.should_receive(:<=>).with(rest).any_number_of_times.and_return(0)
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lhs = [eq_l, eq_l, greater, rest]
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rhs = [eq_r, eq_r, less, rest]
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(lhs <=> rhs).should == +1
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end
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it "properly handles recursive arrays" do
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empty = ArraySpecs.empty_recursive_array
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(empty <=> empty).should == 0
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(empty <=> []).should == 1
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([] <=> empty).should == -1
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(ArraySpecs.recursive_array <=> []).should == 1
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([] <=> ArraySpecs.recursive_array).should == -1
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(ArraySpecs.recursive_array <=> ArraySpecs.empty_recursive_array).should == nil
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array = ArraySpecs.recursive_array
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(array <=> array).should == 0
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end
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it "tries to convert the passed argument to an Array using #to_ary" do
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obj = mock('to_ary')
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obj.stub!(:to_ary).and_return([1, 2, 3])
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([4, 5] <=> obj).should == ([4, 5] <=> obj.to_ary)
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end
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it "does not call #to_ary on Array subclasses" do
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obj = ArraySpecs::ToAryArray[5, 6, 7]
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obj.should_not_receive(:to_ary)
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([5, 6, 7] <=> obj).should == 0
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end
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it "returns nil when the argument is not array-like" do
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([] <=> false).should be_nil
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end
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end
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