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require_relative '../../spec_helper'
describe "Hash#deconstruct_keys" do
it "returns self" do
hash = {a: 1, b: 2}
hash.deconstruct_keys([:a, :b]).should equal hash
end
it "requires one argument" do
-> {
{a: 1}.deconstruct_keys
}.should raise_error(ArgumentError, /wrong number of arguments \(given 0, expected 1\)/)
end
it "ignores argument" do
hash = {a: 1, b: 2}
hash.deconstruct_keys([:a]).should == {a: 1, b: 2}
hash.deconstruct_keys(0 ).should == {a: 1, b: 2}
hash.deconstruct_keys('' ).should == {a: 1, b: 2}
end
end
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