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test-fileio: add test for return value of read_one_line_file()

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Prompted by https://github.com/systemd/systemd/pull/26904#pullrequestreview-1349890241.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
2023-03-23 13:32:45 +01:00
parent 1d5240cfaa
commit d175b709e4
1 changed files with 36 additions and 0 deletions
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src/test/test-fileio.c
+36
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@@ -385,6 +385,42 @@ TEST(capeff) {
}
}
TEST(read_one_line_file) {
_cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-fileio-1lf-XXXXXX";
int fd;
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *buf, *buf2, *buf3, *buf4, *buf5;
fd = mkostemp_safe(fn);
assert_se(fd >= 0);
f = fdopen(fd, "we");
assert_se(f);
assert_se(read_one_line_file(fn, &buf) == 0);
assert_se(streq_ptr(buf, ""));
assert_se(read_one_line_file(fn, &buf2) == 0);
assert_se(streq_ptr(buf2, ""));
assert_se(write_string_stream(f, "x", WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
fflush(f);
assert_se(read_one_line_file(fn, &buf3) == 1);
assert_se(streq_ptr(buf3, "x"));
assert_se(write_string_stream(f, "\n", WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
fflush(f);
assert_se(read_one_line_file(fn, &buf4) == 2);
assert_se(streq_ptr(buf4, "x"));
assert_se(write_string_stream(f, "\n", WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
fflush(f);
assert_se(read_one_line_file(fn, &buf5) == 2);
assert_se(streq_ptr(buf5, "x"));
}
TEST(write_string_stream) {
_cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-write_string_stream-XXXXXX";
_cleanup_fclose_ FILE *f = NULL;