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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/eql'
describe "Array#==" do
it_behaves_like :array_eql, :==
it "compares with an equivalent Array-like object using #to_ary" do
obj = mock('array-like')
obj.should_receive(:respond_to?).at_least(1).with(:to_ary).and_return(true)
obj.should_receive(:==).with([1]).at_least(1).and_return(true)
([1] == obj).should be_true
([[1]] == [obj]).should be_true
([[[1], 3], 2] == [[obj, 3], 2]).should be_true
# recursive arrays
arr1 = [[1]]
arr1 << arr1
arr2 = [obj]
arr2 << arr2
(arr1 == arr2).should be_true
(arr2 == arr1).should be_true
end
it "returns false if any corresponding elements are not #==" do
a = ["a", "b", "c"]
b = ["a", "b", "not equal value"]
a.should_not == b
c = mock("c")
c.should_receive(:==).and_return(false)
["a", "b", c].should_not == a
end
it "returns true if corresponding elements are #==" do
[].should == []
["a", "c", 7].should == ["a", "c", 7]
[1, 2, 3].should == [1.0, 2.0, 3.0]
obj = mock('5')
obj.should_receive(:==).and_return(true)
[obj].should == [5]
end
# See https://bugs.ruby-lang.org/issues/1720
it "returns true for [NaN] == [NaN] because Array#== first checks with #equal? and NaN.equal?(NaN) is true" do
[Float::NAN].should == [Float::NAN]
end
end
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