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# frozen_string_literal: true
return if !(RUBY_ENGINE == "ruby" && RUBY_VERSION >= "3.2.0")
require_relative "test_helper"
module Prism
class LexTest < TestCase
except = [
# It seems like there are some oddities with nested heredocs and ripper.
# Waiting for feedback on https://bugs.ruby-lang.org/issues/19838.
"seattlerb/heredoc_nested.txt",
"whitequark/dedenting_heredoc.txt",
# Ripper seems to have a bug that the regex portions before and after
# the heredoc are combined into a single token. See
# https://bugs.ruby-lang.org/issues/19838.
"spanning_heredoc.txt",
"spanning_heredoc_newlines.txt"
]
if RUBY_VERSION < "3.3.0"
# This file has changed behavior in Ripper in Ruby 3.3, so we skip it if
# we're on an earlier version.
except << "seattlerb/pct_w_heredoc_interp_nested.txt"
# Ruby < 3.3.0 cannot parse heredocs where there are leading whitespace
# characters in the heredoc start.
# Example: <<~' EOF' or <<-' EOF'
# https://bugs.ruby-lang.org/issues/19539
except << "heredocs_leading_whitespace.txt"
end
Fixture.each(except: except) do |fixture|
define_method(fixture.test_name) { assert_lex(fixture) }
end
def test_lex_file
assert_nothing_raised do
Prism.lex_file(__FILE__)
end
error = assert_raise Errno::ENOENT do
Prism.lex_file("idontexist.rb")
end
assert_equal "No such file or directory - idontexist.rb", error.message
assert_raise TypeError do
Prism.lex_file(nil)
end
end
def test_parse_lex
node, tokens = Prism.parse_lex("def foo; end").value
assert_kind_of ProgramNode, node
assert_equal 5, tokens.length
end
def test_parse_lex_file
node, tokens = Prism.parse_lex_file(__FILE__).value
assert_kind_of ProgramNode, node
refute_empty tokens
error = assert_raise Errno::ENOENT do
Prism.parse_lex_file("idontexist.rb")
end
assert_equal "No such file or directory - idontexist.rb", error.message
assert_raise TypeError do
Prism.parse_lex_file(nil)
end
end
private
def assert_lex(fixture)
source = fixture.read
result = Prism.lex_compat(source)
assert_equal [], result.errors
Prism.lex_ripper(source).zip(result.value).each do |(ripper, prism)|
assert_equal ripper, prism
end
end
end
end
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