Add a regression test.

diff --git a/Makefile b/Makefile
index b85bdab18a5e28019f9c77cc29a276b71ba0472e..2547db86c7861f26127ed87f4ac35d710372eb8d 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -32,6 +32,10 @@ clean:
 cppcheck:
        cppcheck --template gcc --enable=all hexdump.c
 
+test: hexdump
+       @hexdump hexdump.png | diff -u hexdump.chk -
+       @echo "No diff output is good news."
+
 dist: hexdump-$(VERS).tar.gz
 
 release: hexdump-$(VERS).tar.gz hexdump.html

diff --git a/NEWS b/NEWS
index 4787388f7ee0eb3e4012853955ce2479ff92db98..e48784ab7c54150b8a00289c3d8287efcccfc3a9 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,7 @@
                        hexdump news
 
 1.8: 2012-12-03
-  Use C99 bools.  Code passes cppcheck audit.
+  Use C99 bools.  Code passes cppcheck audit.  Added a regression test.
 
 1.7: 2010-10-20
   Code fully ANSIfied. License changed to BSD.  RPM spec removed.

diff --git a/README b/README
index 144b2b1a79f5ec61ca014c35b3cbe3d7de0865ce..e8b55302aa25066952671c87605f7b661bfc16e8 100644 (file)
--- a/README
+++ b/README
@@ -17,6 +17,9 @@ resembles a CP/M or MS/DOS DEBUG dump screen. There is nothing UNIX-specific
 in the source, it should work OK under any C with a stdio.h library. And,
 in fact, I'm told it has been used under Windows NT.
 
+To test the program, "make test".  This checks to make sure dumping of
+the PNG logo included with the distribution is stable.
+
 I wrote the original of this in 1983.  I'm not certain, but I think it
 may have been my very first C program, and I believe it was the first
 code I wrote under Unix (4.1BSD on a Vax).  It's certainly the oldest

diff --git a/hexdump.chk b/hexdump.chk
new file mode 100644 (file)
index 0000000..1e972e6
--- /dev/null
+++ b/hexdump.chk
@@ -0,0 +1,38 @@
+0000  89 50 4e 47 0d 0a 1a 0a  00 00 00 0d 49 48 44 52  .PNG.... ....IHDR
+0010  00 00 00 20 00 00 00 20  08 00 00 00 00 56 11 25  ... ...  .....V.%
+0020  28 00 00 00 02 74 52 4e  53 00 00 76 93 cd 38 00  (....tRN S..v..8.
+0030  00 00 02 62 4b 47 44 00  ff 87 8f cc bf 00 00 00  ...bKGD. ........
+0040  09 70 48 59 73 00 00 00  48 00 00 00 48 00 46 c9  .pHYs... H...H.F.
+0050  6b 3e 00 00 01 92 49 44  41 54 38 cb ad 93 21 c2  k>....ID AT8...!.
+0060  2b 21 0c 84 73 af 9a 3d  c0 8a ca 95 48 64 6c 1c  +!..s..= ....Hdl.
+0070  72 2d 12 8b c4 62 90 58  24 72 1d 12 c9 11 5e 86  r-...b.X $r....^.
+0080  3e df 5f 14 53 32 a4 21  5f 86 25 fa ba 2e 73 db  >._.S2.! _.%...s.
+0090  e3 21 0a c7 71 5c b7 0a  e1 8e 2f 51 a1 c8 78 1f  .!..q\.. ../Q..x.
+00a0  88 af db ce 45 f4 bc 46  ca 56 05 6b 27 fb 46 34  ....E..F .V.k'.F4
+00b0  ec b2 13 b1 b8 e8 75 93  4e f3 66 51 e1 76 f9 44  ......u. N.fQ.v.D
+00c0  05 e7 86 0f 1a f7 3e 67  47 85 ae 0b ff 98 73 74  ......>g G.....st
+00d0  3d a7 81 83 ef 2d fe 61  59 9b dc 35 88 e2 75 5d  =....-.a Y..5..u]
+00e0  c6 a8 90 d3 7c 47 fd f5  d7 73 27 50 28 26 7a 18  ....|G.. .s'P(&z.
+00f0  af 1e b9 7f 28 de 0d cd  b9 a7 20 d1 05 71 55 9b  ....(... .. ..qU.
+0100  6b 66 dd de a9 20 32 83  db b5 47 00 4d 8a cf 8a  kf... 2. ..G.M...
+0110  9a 50 e3 4a 11 25 9f 87  1a 68 a8 3d 31 fe 04 43  .P.J.%.. .h.=1..C
+0120  b8 46 8c 34 5a 66 2e a8  5c 93 c5 9d 33 36 96 f9  .F.4Zf.. \...36..
+0130  f1 a2 4c 50 d4 50 b6 17  3c 39 b4 6d 96 7d b4 db  ..LP.P.. <9.m.}..
+0140  58 19 32 0d a9 be fc 37  4b 60 56 4e 6b 27 38 6e  X.2....7 K`VNk'8n
+0150  13 95 22 0b 4b 05 7f 4b  0c fe c4 45 dc 4f bc 08  ..".K..K ...E.O..
+0160  a1 97 a0 57 94 e0 27 20  d4 f7 85 f7 41 d5 8f 81  ...W..'  ....A...
+0170  91 df ea 45 50 b3 da 11  b2 40 50 36 d6 98 a2 74  ...EP... .@P6...t
+0180  66 54 88 f2 a1 b0 2d b9  b4 29 96 20 81 78 59 9c  fT....-. .). .xY.
+0190  b0 cd 9d 41 61 4c 0b 78  49 25 27 c3 d8 78 dd fe  ...AaL.x I%'..x..
+01a0  84 a2 d5 f1 e0 3d f4 5a  27 0a d3 1c 0b 31 a9 3a  .....=.Z '....1.:
+01b0  31 38 56 0a a3 4d e5 83  33 83 c2 b9 89 27 48 f7  18V..M.. 3....'H.
+01c0  d5 25 6e 1a f7 a1 78 8f  22 65 77 bd dc a6 90 71  .%n...x. "ew....q
+01d0  e1 3b 31 c6 97 ed ea 79  66 d7 f7 e4 d2 69 71 99  .;1....y f....iq.
+01e0  90 f1 3f a1 f8 b2 fe 01  fa 7f 11 a9 27 3a b2 19  ..?..... ....':..
+01f0  00 00 00 25 74 45 58 74  64 61 74 65 3a 63 72 65  ...%tEXt date:cre
+0200  61 74 65 00 32 30 31 32  2d 31 32 2d 30 33 54 31  ate.2012 -12-03T1
+0210  35 3a 35 33 3a 32 39 2d  30 35 3a 30 30 40 48 0b  5:53:29- 05:00@H.
+0220  af 00 00 00 25 74 45 58  74 64 61 74 65 3a 6d 6f  ....%tEX tdate:mo
+0230  64 69 66 79 00 32 30 31  32 2d 31 32 2d 30 33 54  dify.201 2-12-03T
+0240  31 35 3a 35 33 3a 32 39  2d 30 35 3a 30 30 31 15  15:53:29 -05:001.
+0250  b3 13 00 00 00 00 49 45  4e 44 ae 42 60 82        ......IE ND.B`.