diff options
Diffstat (limited to 'libgo/go/compress/flate/deflate_test.go')
-rw-r--r-- | libgo/go/compress/flate/deflate_test.go | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/libgo/go/compress/flate/deflate_test.go b/libgo/go/compress/flate/deflate_test.go index 543c595..f1e6db2a 100644 --- a/libgo/go/compress/flate/deflate_test.go +++ b/libgo/go/compress/flate/deflate_test.go @@ -94,6 +94,50 @@ func TestDeflate(t *testing.T) { } } +// A sparseReader returns a stream consisting of 0s followed by 1<<16 1s. +// This tests missing hash references in a very large input. +type sparseReader struct { + l int64 + cur int64 +} + +func (r *sparseReader) Read(b []byte) (n int, err error) { + if r.cur >= r.l { + return 0, io.EOF + } + n = len(b) + cur := r.cur + int64(n) + if cur > r.l { + n -= int(cur - r.l) + cur = r.l + } + for i := range b[0:n] { + if r.cur+int64(i) >= r.l-1<<16 { + b[i] = 1 + } else { + b[i] = 0 + } + } + r.cur = cur + return +} + +func TestVeryLongSparseChunk(t *testing.T) { + if testing.Short() { + t.Logf("skipping sparse chunk during short test") + return + } + w, err := NewWriter(ioutil.Discard, 1) + if err != nil { + t.Errorf("NewWriter: %v", err) + return + } + if _, err = io.Copy(w, &sparseReader{l: 23E8}); err != nil { + t.Errorf("Compress failed: %v", err) + return + } +} + type syncBuffer struct { buf bytes.Buffer mu sync.RWMutex |