t.Errorf("Case: %d %#v, expected: \"%s\", got: \"%s\"", i+1, testCase, string(testCase.expectedBuf), string(buf[:testCase.bufSize]))
				}
				if n != int64(testCase.bufSize) {
					t.Errorf("Case: %d %#v, expected: %d, got: %d", i+1, testCase, testCase.bufSize, n)
				}
			}
		}
	}

	// TestXLStorage for permission denied.
	if runtime.GOOS != globalWindowsOSName {

        int i = 0, n = -5;

        if (off + len > b.length) {
            throw new IOException("Buffer too short, bufsize " + b.length + " read " + len);
        }

        while (i < len) {
            n = in.read(b, off + i, len - i);
            if (n <= 0) {
                break;
            }
            i += n;
        }