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# frozen_string_literal: true
require_relative "../test_helper"
module Prism
class SourceTest < TestCase
def test_line_to_byte_offset
parse_result = Prism.parse(<<~SRC)
abcd
efgh
ijkl
SRC
source = parse_result.source
assert_equal 0, source.line_to_byte_offset(1)
assert_equal 5, source.line_to_byte_offset(2)
assert_equal 10, source.line_to_byte_offset(3)
assert_equal 15, source.line_to_byte_offset(4)
e = assert_raise(ArgumentError) { source.line_to_byte_offset(5) }
assert_equal "line 5 is out of range", e.message
e = assert_raise(ArgumentError) { source.line_to_byte_offset(0) }
assert_equal "line 0 is out of range", e.message
e = assert_raise(ArgumentError) { source.line_to_byte_offset(-1) }
assert_equal "line -1 is out of range", e.message
end
def test_line_to_byte_offset_with_start_line
parse_result = Prism.parse(<<~SRC, line: 11)
abcd
efgh
ijkl
SRC
source = parse_result.source
assert_equal 0, source.line_to_byte_offset(11)
assert_equal 5, source.line_to_byte_offset(12)
assert_equal 10, source.line_to_byte_offset(13)
assert_equal 15, source.line_to_byte_offset(14)
e = assert_raise(ArgumentError) { source.line_to_byte_offset(15) }
assert_equal "line 15 is out of range", e.message
e = assert_raise(ArgumentError) { source.line_to_byte_offset(10) }
assert_equal "line 10 is out of range", e.message
e = assert_raise(ArgumentError) { source.line_to_byte_offset(9) }
assert_equal "line 9 is out of range", e.message
end
end
end
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