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os: add test for os.open_append (#16846)

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* os: add test for os.open_append

* fix unclosed file in test_eof (it made os.open_append fail only on windows, since it got the previous file content, because the file was locked, and os.rm could not delete it)
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Delyan Angelov 2023-01-03 01:11:35 +02:00 committed by GitHub
parent d5b9f7d026
commit 3625a74ec5
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1 changed files with 19 additions and 0 deletions
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19
vlib/os/file_test.v
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@ -405,6 +405,7 @@ fn test_eof() {
assert !f.eof() assert !f.eof()
f.read_bytes(100) f.read_bytes(100)
assert f.eof() assert f.eof()
f.close()
} }
fn test_open_file_wb_ab() { fn test_open_file_wb_ab() {
@ -419,3 +420,21 @@ fn test_open_file_wb_ab() {
afile.close() afile.close()
assert os.read_file('text.txt')? == 'hellohello' assert os.read_file('text.txt')? == 'hellohello'
} }
fn test_open_append() {
os.rm(tfile) or {}
mut f1 := os.open_append(tfile)!
f1.write_string('abc\n')!
f1.close()
assert os.read_lines(tfile)! == ['abc']
//
mut f2 := os.open_append(tfile)!
f2.write_string('abc\n')!
f2.close()
assert os.read_lines(tfile)! == ['abc', 'abc']
//
mut f3 := os.open_append(tfile)!
f3.write_string('def\n')!
f3.close()
assert os.read_lines(tfile)! == ['abc', 'abc', 'def']
}