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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes.rb', __FILE__)
describe "String#sum" do
it "returns a basic n-bit checksum of the characters in self" do
"ruby".sum.should == 450
"ruby".sum(8).should == 194
"rubinius".sum(23).should == 881
end
it "tries to convert n to an integer using to_int" do
obj = mock('8')
obj.should_receive(:to_int).and_return(8)
"hello".sum(obj).should == "hello".sum(8)
end
it "returns sum of the bytes in self if n less or equal to zero" do
"xyz".sum(0).should == 363
"xyz".sum(-10).should == 363
end
end
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