diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/matrix/matrix_test.go | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tests/matrix/matrix_test.go b/tests/matrix/matrix_test.go index eb49d59..d59a677 100644 --- a/tests/matrix/matrix_test.go +++ b/tests/matrix/matrix_test.go @@ -113,6 +113,8 @@ func TestWrite100x100(t *testing.T) { } } +// Hint for calculating reference md5sums: +// dd if=/dev/zero count=1 bs=XYZ | md5sum func TestTruncate(t *testing.T) { fn := test_helpers.DefaultPlainDir + "/truncate" file, err := os.Create(fn) @@ -143,6 +145,31 @@ func TestTruncate(t *testing.T) { if test_helpers.Md5fn(fn) != "620f0b67a91f7f74151bc5be745b7110" { t.Errorf("wrong content") } + // Truncate to zero + file.Truncate(0) + test_helpers.VerifySize(t, fn, 0) + // Grow to 10MB (creates file holes) + var sz int + sz = 10 * 1024 * 1024 + file.Truncate(int64(sz)) + test_helpers.VerifySize(t, fn, sz) + if test_helpers.Md5fn(fn) != "f1c9645dbc14efddc7d8a322685f26eb" { + t.Errorf("wrong content") + } + // Grow to 10MB + 100B (partial block on the end) + sz = 10*1024*1024 + 100 + file.Truncate(int64(sz)) + test_helpers.VerifySize(t, fn, sz) + if test_helpers.Md5fn(fn) != "c23ea79b857b91a7ff07c6ecf185f1ca" { + t.Errorf("wrong content") + } + // Grow to 20MB (creates file holes, partial block on the front) + sz = 20 * 1024 * 1024 + file.Truncate(int64(sz)) + test_helpers.VerifySize(t, fn, sz) + if test_helpers.Md5fn(fn) != "8f4e33f3dc3e414ff94e5fb6905cba8c" { + t.Errorf("wrong content") + } } func TestAppend(t *testing.T) { |