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# frozen_string_literal: true
require_relative "test_helper"
module Prism
class NewlineOffsetsTest < TestCase
Fixture.each do |fixture|
define_method(fixture.test_name) { assert_newline_offsets(fixture) }
end
def test_escape_control_newline
# Newlines consumed inside escape sequences like \C-, \c, and \M-
# must be tracked in line offsets across all literal types.
%w[\\C- \\c \\M-].each do |escape|
assert_newline_offsets_for("\"#{escape}\n\"", "#{escape} in string")
assert_newline_offsets_for("`#{escape}\n`", "#{escape} in xstring")
assert_newline_offsets_for("/#{escape}\n/", "#{escape} in regexp")
assert_newline_offsets_for("%Q{#{escape}\n}", "#{escape} in %Q")
assert_newline_offsets_for("%W[#{escape}\n]", "#{escape} in %W")
assert_newline_offsets_for("<<~H\n#{escape}\n\nH\n", "#{escape} in heredoc")
assert_newline_offsets_for("?#{escape}\n", "#{escape} in char literal")
end
# Combined meta + control escapes
assert_newline_offsets_for("\"\\M-\\C-\n\"", "\\M-\\C- in string")
assert_newline_offsets_for("\"\\M-\\c\n\"", "\\M-\\c in string")
# \r\n consumed inside escape context
assert_newline_offsets_for("\"\\C-\r\n\"", "\\C- with \\r\\n")
end
private
def assert_newline_offsets(fixture)
assert_newline_offsets_for(fixture.read)
end
def assert_newline_offsets_for(source, message = nil)
expected = [0]
source.b.scan("\n") { expected << $~.offset(0)[0] + 1 }
assert_equal expected, Prism.parse(source).source.offsets, message
end
end
end
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