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#!/usr/bin/ruby
# encoding: utf-8
require 'antlr3'
require 'test/unit'
require 'spec'
include ANTLR3
describe TokenScheme do
before do
@ts = TokenScheme.new do
define_tokens(:A => 4, :B => 5, :T__6 => 6)
register_names('A', 'B', "'+'")
end
@a_class = Class.new do
class << self
attr_accessor :token_scheme
end
end
@a_class.send(:include, @ts)
@an_instance = @a_class.new
end
example "token schemes define tokens as constants" do
@ts::A.should == 4
@ts::B.should == 5
@ts::T__6.should == 6
@ts::EOF.should == -1
end
example "token schemes track human-friendly token names" do
@ts::TOKEN_NAMES.should == {
0 => "<invalid>", -1 => "<EOF>", 1 => "<EOR>",
2 => "<DOWN>", 3 => "<UP>", 4 => "A",
5 => "B", 6 => "'+'"
}
@ts.token_name(5).should == 'B'
@ts.token_name(6).should == "'+'"
@ts.token_name(-1).should == '<EOF>'
@ts.token_name(7).should == '<UNKNOWN: 7>'
end
example 'class-level results of including a token scheme' do
#@a_class.token_scheme.should == @ts
@a_class::A.should == 4
@a_class::B.should == 5
@a_class::T__6.should == 6
@a_class::EOF.should == -1
@a_class.send(:token_names).should == {
0 => "<invalid>", -1 => "<EOF>", 1 => "<EOR>",
2 => "<DOWN>", 3 => "<UP>", 4 => "A",
5 => "B", 6 => "'+'"
}
end
example 'instance-level results of including a token scheme' do
end
end
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