[COMPRESS-439] Compressing and decompressing using Pack200 does not produce the original input

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Not A Bug
• Affects Version/s: 1.14, 1.15
• Component/s: Compressors

Environment

Windows 7;

1. java -version
   java version "1.8.0_151"
   Java(TM) SE Runtime Environment (build 1.8.0_151-b12)
   Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)

• Assignee: Unassigned
• Reporter: Valentin Brandl
• Created: 10/Jan/18 11:51
• Updated: 12/Jan/18 16:28
• Resolved: 10/Jan/18 12:03

Description

tI just tested different compressors using JUnitQuickcheck.
The tests should compress and then decompress some input and the result should be equal to the input.
For gzip, bzip2, deflate and xz, this works as intended but pack200 seems to have some problems.
I will attach the testcase I wrote.
It seems that for empty input, the result won't be empty.

Test output:
```
input.length = 0
input = []
compressed.length = 19
compressed = [-54, -2, -48, 13, 7, -106, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 3, 45, 0]
decompressed.length = 29
decompressed = [80, 75, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0, 80, 65, 67, 75, 50, 48, 48]
```