1 # Copyright 2007-2010 Wincent Colaiuta. All rights reserved.
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23 require File.expand_path('spec_helper', File.dirname(__FILE__))
25 describe Walrat::NotPredicate do
26 it 'complains on trying to parse a nil string' do
28 Walrat::NotPredicate.new('irrelevant').parse nil
29 end.to raise_error(ArgumentError, /nil string/)
32 it 'can be compared for equality' do
33 Walrat::NotPredicate.new('foo').
34 should eql(Walrat::NotPredicate.new('foo')) # same
35 Walrat::NotPredicate.new('foo').
36 should_not eql(Walrat::NotPredicate.new('bar')) # different
37 Walrat::NotPredicate.new('foo').
38 should_not eql(Walrat::Predicate.new('foo')) # different class