[dev-context] regression testing: page image differences

Sanjoy Mahajan sanjoy at mrao.cam.ac.uk
Tue Feb 6 00:44:34 CET 2007


Here are output differences between 20070112 and 20070123, mostly to
test the regression tests.  Here's how to decode it.  The line

  WARN: tex/context/base/math-pln.tex/test-001-20070112-20070123.report

means tex/context/base/math-pln.tex/test-001.tex was run through
20070112 and 20070123 to make pdf files, converted to bitmaps, and
subtracted (page by page), and that there were some differences.  The
line

    [p.0001] 0.176462 dB diff [see png's in /tmp/tmp.mRMxS24124/]

menas that p.1 was different in the two runs, but only slightly (about
0.2 dB).  Here another example with a slightly larger dB difference:

  WARN: tex/context/base/core-mat.tex/test-001-20070112-20070123.report
    [p.0001] 5.00882 dB diff [see png's in /tmp/tmp.UllhY25247/]

for which I've attached the two images and their difference.  It's
slight character position shifts, I think.

  WARN: tex/context/base/math-pln.tex/test-001-20070112-20070123.report
    [p.0001] 0.176462 dB diff [see png's in /tmp/tmp.mRMxS24124/]
  WARN: tex/context/base/unic-034.tex/test-001-20070112-20070123.report
    [p.0001] 1.68318 dB diff [see png's in /tmp/tmp.lkiMH24898/]
  WARN: tex/context/base/unic-039.tex/test-001-20070112-20070123.report
    [p.0001] 0.0678701 dB diff [see png's in /tmp/tmp.QRvMD25106/]
  WARN: tex/context/base/core-mat.tex/test-004-20070112-20070123.report
    [p.0001] 4.56087 dB diff [see png's in /tmp/tmp.jtiqZ25156/]
    [p.0002] 4.83235 dB diff [see png's in /tmp/tmp.jtiqZ25156/]
  WARN: tex/context/base/core-mat.tex/test-001-20070112-20070123.report
    [p.0001] 5.00882 dB diff [see png's in /tmp/tmp.UllhY25247/]
  WARN: tex/context/base/core-mat.tex/test-002-20070112-20070123.report
    [p.0001] 3.31206 dB diff [see png's in /tmp/tmp.TFjDk25293/]
  WARN: tex/context/base/core-mat.tex/test-003-20070112-20070123.report
    [p.0001] 0.475091 dB diff [see png's in /tmp/tmp.uaWCt25342/]
  WARN: tex/context/base/unic-000.tex/test-001-20070112-20070123.report
    [p.0001] 0.0814442 dB diff [see png's in /tmp/tmp.BDorO26317/]
  WARN: tex/context/base/unic-003.tex/test-001-20070112-20070123.report
    [p.0001] 0.0678701 dB diff [see png's in /tmp/tmp.lzEhB26435/]
  WARN: tex/context/base/core-itm.tex/test-001-20070112-20070123.report
    [p.0001] 0.352925 dB diff [see png's in /tmp/tmp.RDqzg26640/]
    [p.0002] 0.746572 dB diff [see png's in /tmp/tmp.RDqzg26640/]
    [p.0003] 1.85964 dB diff [see png's in /tmp/tmp.RDqzg26640/]
    [p.0004] 4.57445 dB diff [see png's in /tmp/tmp.RDqzg26640/]
    [p.0005] 1.03163 dB diff [see png's in /tmp/tmp.RDqzg26640/]

-Sanjoy

`A nation of slaves is always prepared to applaud the clemency of their
 master who, in the abuse of absolute power, does not proceed to the
 last extremes of injustice and oppression.'  (Gibbon)  

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