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io: migrate the Reader API to Result instead of Option (#15229)

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This commit is contained in:
Vincenzo Palazzo
2022-08-08 00:33:25 +01:00
committed by GitHub
parent 8c33a40c5a
commit b01f71d9da
13 changed files with 89 additions and 37 deletions
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16
vlib/os/file_test.v
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@@ -130,11 +130,11 @@ fn test_read_eof_last_read_partial_buffer_fill() ? {
f = os.open_file(tfile, 'r')?
mut br := []u8{len: 100}
// Read first 100 bytes of 199 byte file, should fill buffer with no error.
n0 := f.read(mut br)?
n0 := f.read(mut br) or { return error('failed to read 100 bytes') }
assert n0 == 100
// Read remaining 99 bytes of 199 byte file, should fill buffer with no
// error, even though end-of-file was reached.
n1 := f.read(mut br)?
n1 := f.read(mut br) or { return error('failed to read 100 bytes') }
assert n1 == 99
// Read again, end-of-file was previously reached so should return none
// error.
@@ -143,8 +143,8 @@ fn test_read_eof_last_read_partial_buffer_fill() ? {
// not return a number of bytes read when end-of-file is reached.
assert false
} else {
// Expect none to have been returned when end-of-file.
assert err is none
// Expected an error when received end-of-file.
assert err !is none
}
f.close()
}
@@ -162,11 +162,11 @@ fn test_read_eof_last_read_full_buffer_fill() ? {
f = os.open_file(tfile, 'r')?
mut br := []u8{len: 100}
// Read first 100 bytes of 200 byte file, should fill buffer with no error.
n0 := f.read(mut br)?
n0 := f.read(mut br) or { return error('failed to read 100 bytes') }
assert n0 == 100
// Read remaining 100 bytes of 200 byte file, should fill buffer with no
// error. The end-of-file isn't reached yet, but there is no more data.
n1 := f.read(mut br)?
n1 := f.read(mut br) or { return error('failed to read 100 bytes') }
assert n1 == 100
// Read again, end-of-file was previously reached so should return none
// error.
@@ -175,8 +175,8 @@ fn test_read_eof_last_read_full_buffer_fill() ? {
// not return a number of bytes read when end-of-file is reached.
assert false
} else {
// Expect none to have been returned when end-of-file.
assert err is none
// Expect an error at EOF.
assert err !is none
}
f.close()
}