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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes.rb', __FILE__)
# TODO: Move actual results to String#to_int() and spec in terms of it
describe "String#hex" do
it "treats leading characters of self as a string of hex digits" do
"0a".hex.should == 10
"0o".hex.should == 0
"0x".hex.should == 0
"A_BAD_BABE".hex.should == 0xABADBABE
"0b1010".hex.should == "b1010".hex
"0d500".hex.should == "d500".hex
"abcdefG".hex.should == 0xabcdef
end
it "does not accept a sequence of underscores as part of a number" do
"a__b".hex.should == 0xa
"a____b".hex.should == 0xa
"a___f".hex.should == 0xa
end
it "takes an optional sign" do
"-1234".hex.should == -4660
"+1234".hex.should == 4660
end
it "takes an optional 0x" do
"0x0a".hex.should == 10
"0a".hex.should == 10
end
it "requires that the sign is in front of the 0x if present" do
"-0x1".hex.should == -1
"0x-1".hex.should == 0
end
it "returns 0 on error" do
"".hex.should == 0
"+-5".hex.should == 0
"wombat".hex.should == 0
"0x0x42".hex.should == 0
end
it "returns 0 if sequence begins with underscore" do
"_a".hex.should == 0
"___b".hex.should == 0
"___0xc".hex.should == 0
end
end
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