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require_relative '../../spec_helper'
describe "Symbol#<=> with Symbol" do
it "compares individual characters based on their ascii value" do
ascii_order = Array.new(256) { |x| x.chr.to_sym }
sort_order = ascii_order.sort
sort_order.should == ascii_order
end
it "returns -1 when self is less than other" do
(:this <=> :those).should == -1
end
it "returns 0 when self is equal to other" do
(:yep <=> :yep).should == 0
end
it "returns 1 when self is greater than other" do
(:yoddle <=> :griddle).should == 1
end
it "considers symbol that comes lexicographically first to be less if the symbols have same size" do
(:aba <=> :abc).should == -1
(:abc <=> :aba).should == 1
end
it "doesn't consider shorter string to be less if longer string starts with shorter one" do
(:abc <=> :abcd).should == -1
(:abcd <=> :abc).should == 1
end
it "compares shorter string with corresponding number of first chars of longer string" do
(:abx <=> :abcd).should == 1
(:abcd <=> :abx).should == -1
end
end
describe "Symbol#<=>" do
it "returns nil if other is a String" do
(:abc <=> "abc").should be_nil
end
it "returns nil if other is an Integer" do
(:abc <=> 1).should be_nil
end
it "returns nil if other is an object" do
obj = mock("string <=>")
(:abc <=> obj).should be_nil
end
end
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