1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
# frozen_string_literal: true
require_relative '../../test_helper'
# File SysWrite test class
class FileSysWriteTest < Minitest::Test
def setup
FakeFS.activate!
FakeFS::FileSystem.clear
end
def teardown
FakeFS.deactivate!
FakeFS::FileSystem.clear
end
def test_returns_one_byte_when_written
f = File.open 'foo', 'w'
result = f.syswrite 'a'
assert_equal 1, result
end
def test_returns_two_bytes_when_two_written
f = File.open 'foo', 'w'
result = f.syswrite 'ab'
assert_equal 2, result
end
def test_syswrite_writes_file
f = File.open 'foo', 'w'
f.syswrite 'abcdef'
f.close
assert_equal 'abcdef', File.read('foo')
end
def test_writes_to_the_actual_position_when_called_after_buffered_io_read
File.open('foo', 'w') do |file|
file.syswrite('012345678901234567890123456789')
end
file = File.open('foo', 'r+')
file.read(5)
file.syswrite('abcde')
File.open('foo') do |f|
assert_equal '01234abcde', f.sysread(10)
end
end
def test_writes_all_of_the_strings_bytes_but_does_not_buffer_them
File.open('foo', 'w') do |file|
file.syswrite('012345678901234567890123456789')
end
file = File.open('foo', 'r+')
file.syswrite('abcde')
File.open('foo') do |f|
assert_equal 'abcde56789', f.sysread(10)
f.seek(0)
f.fsync
assert_equal 'abcde56789', f.sysread(10)
end
end
end
|
