class Gherkin::TokenScanner
The scanner reads a gherkin doc (typically read from a .feature file) and creates a token for line. The tokens are passed to the parser, which outputs an AST (Abstract Syntax Tree).
If the scanner sees a # language header, it will reconfigure itself dynamically to look for Gherkin
keywords for the associated language. The keywords are defined in gherkin-languages.json.
Public Class Methods
new(source_or_io)
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# File lib/gherkin/token_scanner.rb, line 14 def initialize(source_or_io) @line_number = 0 case(source_or_io) when String @io = StringIO.new(source_or_io) when StringIO, IO @io = source_or_io else fail ArgumentError, "Please a pass String, StringIO or IO. I got a #{source_or_io.class}" end end
Public Instance Methods
read()
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# File lib/gherkin/token_scanner.rb, line 27 def read location = {line: @line_number += 1} if @io.nil? || line = @io.gets gherkin_line = line ? GherkinLine.new(line, location[:line]) : nil Token.new(gherkin_line, location) else @io.close unless @io.closed? # ARGF closes the last file after final gets @io = nil Token.new(nil, location) end end