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|
import os
struct Point {
x f64
y f64
z f64
}
struct Extended_Point {
a f64
b f64
c f64
d f64
e f64
f f64
g f64
h f64
i f64
}
enum Color {
red
green
blue
}
[flag]
enum Permissions {
read
write
execute
}
const (
unit_point = Point{1.0, 1.0, 1.0}
another_point = Point{0.25, 2.25, 6.25}
extended_point = Extended_Point{1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0}
another_byte = byte(123)
another_color = Color.red
another_permission = Permissions.read | .write
)
const (
tfolder = os.join_path(os.temp_dir(), 'os_file_test')
tfile = os.join_path(tfolder, 'test_file')
)
fn testsuite_begin() ? {
os.rmdir_all(tfolder) or {}
assert !os.is_dir(tfolder)
os.mkdir_all(tfolder) ?
os.chdir(tfolder) ?
assert os.is_dir(tfolder)
}
fn testsuite_end() ? {
os.chdir(os.wd_at_startup) ?
os.rmdir_all(tfolder) ?
assert !os.is_dir(tfolder)
}
// test_read_bytes_into_newline_text tests reading text from a file with newlines.
// This test simulates reading a larger text file step by step into a buffer and
// returning on each newline, even before the buffer is full, and reaching EOF before
// the buffer is completely filled.
fn test_read_bytes_into_newline_text() ? {
mut f := os.open_file(tfile, 'w') ?
f.write_string('Hello World!\nGood\r morning.') ?
f.close()
f = os.open_file(tfile, 'r') ?
mut buf := []byte{len: 8}
n0 := f.read_bytes_into_newline(mut buf) ?
assert n0 == 8
n1 := f.read_bytes_into_newline(mut buf) ?
assert n1 == 5
n2 := f.read_bytes_into_newline(mut buf) ?
assert n2 == 8
n3 := f.read_bytes_into_newline(mut buf) ?
assert n3 == 6
f.close()
}
// test_read_bytes_into_newline_binary tests reading a binary file with NUL bytes.
// This test simulates the scenario when a byte stream is read and a newline byte
// appears in that stream and an EOF occurs before the buffer is full.
fn test_read_bytes_into_newline_binary() ? {
os.rm(tfile) or {} // FIXME This is a workaround for macos, because the file isn't truncated when open with 'w'
mut bw := []byte{len: 15}
bw[9] = 0xff
bw[12] = 10 // newline
n0_bytes := bw[0..10]
n1_bytes := bw[10..13]
n2_bytes := bw[13..]
mut f := os.open_file(tfile, 'w') ?
f.write(bw) ?
f.close()
f = os.open_file(tfile, 'r') ?
mut buf := []byte{len: 10}
n0 := f.read_bytes_into_newline(mut buf) ?
assert n0 == 10
assert buf[..n0] == n0_bytes
n1 := f.read_bytes_into_newline(mut buf) ?
assert n1 == 3
assert buf[..n1] == n1_bytes
n2 := f.read_bytes_into_newline(mut buf) ?
assert n2 == 2
assert buf[..n2] == n2_bytes
f.close()
}
// test_read_eof_last_read_partial_buffer_fill tests that when reading a file
// the end-of-file is detected and results in a none error being returned. This
// test simulates file reading where the end-of-file is reached inside an fread
// containing data.
fn test_read_eof_last_read_partial_buffer_fill() ? {
mut f := os.open_file(tfile, 'w') ?
bw := []byte{len: 199, init: 5}
f.write(bw) ?
f.close()
f = os.open_file(tfile, 'r') ?
mut br := []byte{len: 100}
// Read first 100 bytes of 199 byte file, should fill buffer with no error.
n0 := f.read(mut br) ?
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) ?
assert n1 == 99
// Read again, end-of-file was previously reached so should return none
// error.
if _ := f.read(mut br) {
// This is not intended behavior because the read function should
// 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
}
f.close()
}
// test_read_eof_last_read_full_buffer_fill tests that when reading a file the
// end-of-file is detected and results in a none error being returned. This test
// simulates file reading where the end-of-file is reached at the beinning of an
// fread that returns no data.
fn test_read_eof_last_read_full_buffer_fill() ? {
mut f := os.open_file(tfile, 'w') ?
bw := []byte{len: 200, init: 5}
f.write(bw) ?
f.close()
f = os.open_file(tfile, 'r') ?
mut br := []byte{len: 100}
// Read first 100 bytes of 200 byte file, should fill buffer with no error.
n0 := f.read(mut br) ?
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) ?
assert n1 == 100
// Read again, end-of-file was previously reached so should return none
// error.
if _ := f.read(mut br) {
// This is not intended behavior because the read function should
// 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
}
f.close()
}
fn test_write_struct() ? {
os.rm(tfile) or {} // FIXME This is a workaround for macos, because the file isn't truncated when open with 'w'
size_of_point := int(sizeof(Point))
mut f := os.open_file(tfile, 'w') ?
f.write_struct(another_point) ?
f.close()
x := os.read_file(tfile) ?
pcopy := unsafe { &byte(memdup(&another_point, size_of_point)) }
y := unsafe { pcopy.vstring_with_len(size_of_point) }
assert x == y
$if debug {
eprintln(x.bytes())
eprintln(y.bytes())
}
}
fn test_write_struct_at() ? {
mut f := os.open_file(tfile, 'w') ?
f.write_struct(extended_point) ?
f.write_struct_at(another_point, 3) ?
f.close()
f = os.open_file(tfile, 'r') ?
mut p := Point{}
f.read_struct_at(mut p, 3) ?
f.close()
assert p == another_point
}
fn test_read_struct() ? {
mut f := os.open_file(tfile, 'w') ?
f.write_struct(another_point) ?
f.close()
f = os.open_file(tfile, 'r') ?
mut p := Point{}
f.read_struct(mut p) ?
f.close()
assert p == another_point
}
fn test_read_struct_at() ? {
mut f := os.open_file(tfile, 'w') ?
f.write([byte(1), 2, 3]) ?
f.write_struct(another_point) ?
f.close()
f = os.open_file(tfile, 'r') ?
mut p := Point{}
f.read_struct_at(mut p, 3) ?
f.close()
assert p == another_point
}
fn test_write_raw() ? {
os.rm(tfile) or {} // FIXME This is a workaround for macos, because the file isn't truncated when open with 'w'
size_of_point := int(sizeof(Point))
mut f := os.open_file(tfile, 'w') ?
f.write_raw(another_point) ?
f.close()
x := os.read_file(tfile) ?
pcopy := unsafe { &byte(memdup(&another_point, size_of_point)) }
y := unsafe { pcopy.vstring_with_len(size_of_point) }
assert x == y
$if debug {
eprintln(x.bytes())
eprintln(y.bytes())
}
}
fn test_write_raw_at() ? {
mut f := os.open_file(tfile, 'w') ?
f.write_raw(extended_point) ?
f.write_raw_at(another_point, 3) ?
f.close()
f = os.open_file(tfile, 'r') ?
mut p := Point{}
f.read_struct_at(mut p, 3) ?
f.close()
assert p == another_point
}
fn test_write_raw_at_negative_pos() ? {
mut f := os.open_file(tfile, 'w') ?
if _ := f.write_raw_at(another_point, -1) {
assert false
}
f.write_raw_at(another_point, -234) or { assert err.msg == 'Invalid argument' }
f.close()
}
fn test_read_raw() ? {
mut f := os.open_file(tfile, 'w') ?
f.write_raw(another_point) ?
f.write_raw(another_byte) ?
f.write_raw(another_color) ?
f.write_raw(another_permission) ?
f.close()
f = os.open_file(tfile, 'r') ?
p := f.read_raw<Point>() ?
b := f.read_raw<byte>() ?
c := f.read_raw<Color>() ?
x := f.read_raw<Permissions>() ?
f.close()
assert p == another_point
assert b == another_byte
assert c == another_color
assert x == another_permission
}
fn test_read_raw_at() ? {
mut f := os.open_file(tfile, 'w') ?
f.write([byte(1), 2, 3]) ?
f.write_raw(another_point) ?
f.write_raw(another_byte) ?
f.write_raw(another_color) ?
f.write_raw(another_permission) ?
f.close()
f = os.open_file(tfile, 'r') ?
mut at := u64(3)
p := f.read_raw_at<Point>(at) ?
at += sizeof(Point)
b := f.read_raw_at<byte>(at) ?
at += sizeof(byte)
c := f.read_raw_at<Color>(at) ?
at += sizeof(Color)
x := f.read_raw_at<Permissions>(at) ?
at += sizeof(Permissions)
f.close()
assert p == another_point
assert b == another_byte
assert c == another_color
assert x == another_permission
}
fn test_read_raw_at_negative_pos() ? {
mut f := os.open_file(tfile, 'r') ?
if _ := f.read_raw_at<Point>(-1) {
assert false
}
f.read_raw_at<Point>(-234) or { assert err.msg == 'Invalid argument' }
f.close()
}
fn test_seek() ? {
mut f := os.open_file(tfile, 'w') ?
f.write_raw(another_point) ?
f.write_raw(another_byte) ?
f.write_raw(another_color) ?
f.write_raw(another_permission) ?
f.close()
// println('> ${sizeof(Point)} ${sizeof(byte)} ${sizeof(Color)} ${sizeof(Permissions)}')
f = os.open_file(tfile, 'r') ?
//
f.seek(i64(sizeof(Point)), .start) ?
assert f.tell() ? == sizeof(Point)
b := f.read_raw<byte>() ?
assert b == another_byte
f.seek(i64(sizeof(Color)), .current) ?
x := f.read_raw<Permissions>() ?
assert x == another_permission
//
f.close()
}
fn test_tell() ? {
for size in 10 .. 30 {
s := 'x'.repeat(size)
os.write_file(tfile, s) ?
fs := os.file_size(tfile)
assert int(fs) == size
//
mut f := os.open_file(tfile, 'r') ?
f.seek(-5, .end) ?
pos := f.tell() ?
f.close()
// dump(pos)
assert pos == size - 5
}
}
|
