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require File.expand_path("#{File.dirname(__FILE__)}/../spec_helper")
module ZeroOrMoreSpec
class Foo < Treetop::Runtime::SyntaxNode
end
describe "zero or more of a terminal symbol followed by a node class declaration and a block" do
testing_expression '"foo"* <ZeroOrMoreSpec::Foo> { def a_method; end }'
it "successfully parses epsilon, returning an instance declared node class and recording a terminal failure" do
parse('') do |result|
result.should_not be_nil
result.should be_an_instance_of(Foo)
result.should respond_to(:a_method)
terminal_failures = parser.terminal_failures
terminal_failures.size.should == 1
failure = terminal_failures.first
failure.index.should == 0
failure.expected_string.should == 'foo'
end
end
it "successfully parses two of that terminal in a row, returning an instance of the declared node class and recording a failure representing the third attempt " do
parse("foofoo") do |result|
result.should_not be_nil
result.should be_an_instance_of(Foo)
terminal_failures = parser.terminal_failures
terminal_failures.size.should == 1
failure = terminal_failures.first
failure.index.should == 6
failure.expected_string.should == 'foo'
end
end
end
describe "Zero or more of a sequence" do
testing_expression '("foo" "bar")*'
it "resets the index appropriately following partially matcing input" do
parse('foobarfoo', :consume_all_input => false) do |result|
result.should_not be_nil
result.interval.should == (0...6)
end
end
end
describe "Zero or more of a choice" do
testing_expression '("a" / "b")*'
it "successfully parses matching input" do
parse('abba').should_not be_nil
end
end
end
Version data entries
76 entries across 76 versions & 7 rubygems