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# frozen_string_literal: true
require 'helper'
class TestSourceBuffer < Minitest::Test
def setup
@buffer = Parser::Source::Buffer.new('(string)')
end
def test_initialize
buffer = Parser::Source::Buffer.new(nil)
assert_equal '', buffer.name
buffer = Parser::Source::Buffer.new(Pathname('a/b'))
assert_equal 'a/b', buffer.name
buffer = Parser::Source::Buffer.new('(string)')
assert_equal '(string)', buffer.name
assert_equal 1, buffer.first_line
buffer = Parser::Source::Buffer.new('(string)', 5)
assert_equal 5, buffer.first_line
buffer = Parser::Source::Buffer.new('(string)', source: '2+2')
assert_equal '2+2', buffer.source
end
def test_source_setter
@buffer.source = 'foo'
assert_equal 'foo', @buffer.source
assert @buffer.source.frozen?
end
def test_source_double_setter
@buffer.source = 'foo'
assert_raises(ArgumentError) do
@buffer.source = 'bar'
end
end
def test_source_setter_encoding_error
error = assert_raises EncodingError do
@buffer.source = [
'# encoding: utf-8',
"# \xf9"
].join("\n")
end
assert_match(/invalid byte sequence in UTF\-8/, error.message)
end
def test_read
tempfile = Tempfile.new('parser')
tempfile.write('foobar')
tempfile.flush
buffer = Parser::Source::Buffer.new(tempfile.path)
buffer.read
assert_equal 'foobar', buffer.source
assert buffer.source.frozen?
end
def test_uninitialized
assert_raises RuntimeError do
@buffer.source
end
end
def test_decompose_position
@buffer.source = "1\nfoo\nbar"
assert_equal [1, 0], @buffer.decompose_position(0)
assert_equal [1, 1], @buffer.decompose_position(1)
assert_equal [2, 0], @buffer.decompose_position(2)
assert_equal [3, 1], @buffer.decompose_position(7)
assert_equal [3, 36], @buffer.decompose_position(42)
assert_equal [0, -52], @buffer.decompose_position(-42)
end
def test_decompose_position_mapped
@buffer = Parser::Source::Buffer.new('(string)', 5)
@buffer.source = "1\nfoo\nbar"
assert_equal [5, 0], @buffer.decompose_position(0)
assert_equal [6, 0], @buffer.decompose_position(2)
end
def test_line
@buffer.source = "1\nfoo\nbar"
assert_equal '1', @buffer.source_line(1)
assert_equal 'foo', @buffer.source_line(2)
end
def test_line_mutate
@buffer.source = "1\nfoo\nbar"
assert_equal '1', @buffer.source_line(1)
@buffer.source_line(1)[0] = '2'
assert_equal '1', @buffer.source_line(1)
end
def test_line_mapped
@buffer = Parser::Source::Buffer.new('(string)', 5)
@buffer.source = "1\nfoo\nbar"
assert_equal '1', @buffer.source_line(5)
assert_equal 'foo', @buffer.source_line(6)
end
def test_line_range
@buffer = Parser::Source::Buffer.new('(string)', 5)
@buffer.source = "abc\ndef\nghi\n"
assert_raises IndexError do
@buffer.line_range(4)
end
assert_equal 'abc', @buffer.line_range(5).source
assert_equal 'def', @buffer.line_range(6).source
assert_equal 'ghi', @buffer.line_range(7).source
assert_equal '', @buffer.line_range(8).source
assert_raises IndexError do
@buffer.line_range(9)
end
end
def test_source_range
@buffer = Parser::Source::Buffer.new('(string)', 5)
assert_raises RuntimeError do
@buffer.source_range
end
@buffer.source = "abc\ndef\nghi\n"
assert_equal Parser::Source::Range.new(@buffer, 0, @buffer.source.size), @buffer.source_range
end
def test_last_line
@buffer.source = "1\nfoo\nbar"
assert_equal 3, @buffer.last_line
@buffer = Parser::Source::Buffer.new('(string)', 5)
@buffer.source = ""
assert_equal 5, @buffer.last_line
@buffer = Parser::Source::Buffer.new('(string)', 5)
@buffer.source = "abc\n"
assert_equal 6, @buffer.last_line
end
def test_source_lines
@buffer.source = "1\nfoo\nbar\n"
assert_equal ['1', 'foo', 'bar', ''], @buffer.source_lines
assert @buffer.source_lines.frozen?
assert @buffer.source_lines.all?(&:frozen?)
@buffer = Parser::Source::Buffer.new('(string)', 5)
@buffer.source = "foo\nbar"
assert_equal ['foo', 'bar'], @buffer.source_lines
end
def test_freeze
@buffer.source = "1\nfoo\nbar\n"
@buffer.freeze
@buffer.source_lines
@buffer.source_range
assert_equal 'foo', @buffer.line_range(2).source
end
def test_ractor
@buffer.source = "hello\n:world\nstrange\nodd"
::Ractor.make_shareable(@buffer)
assert ::Ractor.shareable?(@buffer)
assert_equal ':world', @buffer.line_range(2).source
end if defined?(::Ractor)
def test_inspect
assert_equal '#<Parser::Source::Buffer (string)>', @buffer.inspect
end
end
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