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Contents
describe "Hash#flatten" do
before(:each) do
@h = {:plato => :greek,
:witgenstein => [:austrian, :british],
:russell => :welsh}
end
it "returns an Array" do
{}.flatten.should be_kind_of(Array)
end
it "returns an empty Array for an empty Hash" do
{}.flatten.should == []
end
it "sets each even index of the Array to a key of the hash" do
a = @h.flatten
a[0].should == :plato
a[2].should == :witgenstein
a[4].should == :russell
end
it "sets each odd index of the Array to the value corresponding to the previous element" do
a = @h.flatten
a[1].should == :greek
a[3].should == [:austrian, :british]
a[5].should == :welsh
end
it "does not recursively flatten Array values when called without arguments" do
a = @h.flatten
a[3].should == [:austrian, :british]
end
it "does not recursivley flatten Hash values when called without arguments" do
@h[:russell] = {:born => :wales, :influenced_by => :mill}
a = @h.flatten
a[5].should_not == {:born => :wales, :influenced_by => :mill}.flatten
end
it "recursively flattens Array values when called with an argument >= 2" do
a = @h.flatten(2)
a[3].should == :austrian
a[4].should == :british
end
end
Version data entries
29 entries across 29 versions & 1 rubygems