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#!/bin/bash
#
# Any copyright is dedicated to the Public Domain.
# http://creativecommons.org/publicdomain/zero/1.0/
#
# This is a script that I used to generate a suite of tests for the CSS
# properties "object-fit" and "object-position" (focusing on edge-case
# object-position values that require pixel rounding), using a template
# testcase file and reference case file.
#
# The reference case uses the "background-size" & "background-position"
# equivalent of the tested "object-fit" / "object-position" values.
FILE_PATH="./"
REFTEST_LIST_FILE="$FILE_PATH/reftest.list"
TEMPLATE_TESTCASE_FILENAME=$FILE_PATH/support/template-object-position-test.html
TEMPLATE_REFERENCE_FILENAME=$FILE_PATH/support/template-object-position-ref.html
imageFileFormat="svg"
# Array of image files to use for testing:
imageFileArr=("support/colors-16x8.svg" "support/colors-8x16.svg")
numImageFiles=${#imageFileArr[@]}
# Array of CSS classes to delete from the template, for a given image-file.
# DETAILS: The template files contain some elements/styles that exercise
# object-position x-values (op_x), and other elements/styles that exercise
# object-position y-values (op_y). But actually, we'll only have extra space
# for these percent values to resolve against in *one* dimension (since our
# image-files are rectangular, and the container element is square, and we
# scale the image up with "object-fit: contain"). So, we delete the
# elements/styles in the dimension where object-position % values will just
# resolve to 0 ("op_x" for the fat image, and "op_y" for the tall image).
classPatternToDeleteArr=("op_x" "op_y")
# Array of tag-names for elements that we'd like to test:
# (Also: array of a single-letter abbreviation for each element, an array of
# the close tag for each element -- if a close tag is needed -- and an array
# indicating the attribute that each element uses to specify its image source.)
tagNameArr=( "embed" "img" "object" "video" )
tagLetterArr=( "e" "i" "o" "p" )
tagCloseTokenArr=( "" "" "</object>" "</video>" )
tagSrcAttrArr=( "src" "src" "data" "poster" )
numTags=${#tagNameArr[@]}
for ((j = 0; j < $numImageFiles; j++)); do
imageFile=${imageFileArr[$j]}
classPatternToDelete=${classPatternToDeleteArr[$j]}
let testNum=$j+1
testNum="00$testNum" # zero-pad to 3 digits, per w3c convention
filenameStub="object-position-$imageFileFormat-$testNum"
# Generate a reference case:
filenameRef="$filenameStub-ref.html"
echo Generating ${filenameRef}.
cat $TEMPLATE_REFERENCE_FILENAME \
| sed "s,REPLACEME_IMAGE_FILENAME,$imageFile," \
| sed "/$classPatternToDelete/d" \
> $FILE_PATH/$filenameRef
# Generate a test for each of our tags:
for ((k = 0; k < $numTags; k++)); do
tagName=${tagNameArr[$k]}
tagLetter=${tagLetterArr[$k]}
tagCloseToken=${tagCloseTokenArr[$k]}
tagSrcAttr=${tagSrcAttrArr[$k]}
filenameTest="$filenameStub$tagLetter.html"
testTitle="various 'object-position' values on a fixed-size $tagName element, with a SVG image and 'object-fit:contain'."
echo Generating ${filenameTest}.
cat $TEMPLATE_TESTCASE_FILENAME \
| sed "s,REPLACEME_IMAGE_FILENAME,$imageFile," \
| sed "s/REPLACEME_TEST_TITLE/$testTitle/" \
| sed "s,REPLACEME_REFERENCE_FILENAME,$filenameRef," \
| sed "s/REPLACEME_CONTAINER_TAG/$tagName/" \
| sed "s,REPLACEME_CONTAINER_CLOSETAG,$tagCloseToken," \
| sed "s/REPLACEME_SRC_ATTR/$tagSrcAttr/" \
| sed "/$classPatternToDelete/d" \
> $FILE_PATH/$filenameTest
echo "== $filenameTest $filenameRef" \
>> $REFTEST_LIST_FILE
done
done
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