testing/web-platform/tests/css/css-images/support/generate-object-position-svg-tests.sh

   1 #!/bin/bash
   2 #
   3 # Any copyright is dedicated to the Public Domain.
   4 # http://creativecommons.org/publicdomain/zero/1.0/
   5 #
   6 # This is a script that I used to generate a suite of tests for the CSS
   7 # properties "object-fit" and "object-position" (focusing on edge-case
   8 # object-position values that require pixel rounding), using a template
   9 # testcase file and reference case file.
  10 #
  11 # The reference case uses the "background-size" & "background-position"
  12 # equivalent of the tested "object-fit" / "object-position" values.
  13
  14 FILE_PATH="./"
  15 REFTEST_LIST_FILE="$FILE_PATH/reftest.list"
  16
  17 TEMPLATE_TESTCASE_FILENAME=$FILE_PATH/support/template-object-position-test.html
  18 TEMPLATE_REFERENCE_FILENAME=$FILE_PATH/support/template-object-position-ref.html
  19
  20 imageFileFormat="svg"
  21
  22 # Array of image files to use for testing:
  23 imageFileArr=("support/colors-16x8.svg" "support/colors-8x16.svg")
  24 numImageFiles=${#imageFileArr[@]}
  25
  26 # Array of CSS classes to delete from the template, for a given image-file.
  27 # DETAILS: The template files contain some elements/styles that exercise
  28 # object-position x-values (op_x), and other elements/styles that exercise
  29 # object-position y-values (op_y). But actually, we'll only have extra space
  30 # for these percent values to resolve against in *one* dimension (since our
  31 # image-files are rectangular, and the container element is square, and we
  32 # scale the image up with "object-fit: contain"). So, we delete the
  33 # elements/styles in the dimension where object-position % values will just
  34 # resolve to 0 ("op_x" for the fat image, and "op_y" for the tall image).
  35 classPatternToDeleteArr=("op_x" "op_y")
  36
  37 # Array of tag-names for elements that we'd like to test:
  38 # (Also: array of a single-letter abbreviation for each element, an array of
  39 # the close tag for each element -- if a close tag is needed -- and an array
  40 # indicating the attribute that each element uses to specify its image source.)
  41 tagNameArr=(       "embed" "img" "object"    "video" )
  42 tagLetterArr=(     "e"     "i"   "o"         "p" )
  43 tagCloseTokenArr=( ""      ""    "</object>" "</video>" )
  44 tagSrcAttrArr=(        "src"   "src" "data"      "poster" )
  45 numTags=${#tagNameArr[@]}
  46
  47   for ((j = 0; j < $numImageFiles; j++)); do
  48     imageFile=${imageFileArr[$j]}
  49
  50     classPatternToDelete=${classPatternToDeleteArr[$j]}
  51
  52     let testNum=$j+1
  53     testNum="00$testNum" # zero-pad to 3 digits, per w3c convention
  54
  55     filenameStub="object-position-$imageFileFormat-$testNum"
  56
  57     # Generate a reference case:
  58     filenameRef="$filenameStub-ref.html"
  59     echo Generating ${filenameRef}.
  60     cat $TEMPLATE_REFERENCE_FILENAME \
  61       | sed "s,REPLACEME_IMAGE_FILENAME,$imageFile," \
  62       | sed "/$classPatternToDelete/d" \
  63       > $FILE_PATH/$filenameRef
  64
  65     # Generate a test for each of our tags:
  66     for ((k = 0; k < $numTags; k++)); do
  67       tagName=${tagNameArr[$k]}
  68       tagLetter=${tagLetterArr[$k]}
  69       tagCloseToken=${tagCloseTokenArr[$k]}
  70       tagSrcAttr=${tagSrcAttrArr[$k]}
  71
  72       filenameTest="$filenameStub$tagLetter.html"
  73       testTitle="various 'object-position' values on a fixed-size $tagName element, with a SVG image and 'object-fit:contain'."
  74       echo Generating ${filenameTest}.
  75       cat $TEMPLATE_TESTCASE_FILENAME \
  76         | sed "s,REPLACEME_IMAGE_FILENAME,$imageFile," \
  77         | sed "s/REPLACEME_TEST_TITLE/$testTitle/" \
  78         | sed "s,REPLACEME_REFERENCE_FILENAME,$filenameRef," \
  79         | sed "s/REPLACEME_CONTAINER_TAG/$tagName/" \
  80         | sed "s,REPLACEME_CONTAINER_CLOSETAG,$tagCloseToken,"  \
  81         | sed "s/REPLACEME_SRC_ATTR/$tagSrcAttr/" \
  82         | sed "/$classPatternToDelete/d" \
  83         > $FILE_PATH/$filenameTest
  84
  85       echo "== $filenameTest $filenameRef" \
  86         >> $REFTEST_LIST_FILE
  87     done
  88   done