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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", 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.
+# (One exception: since there is no "background-size" equivalent of
+# "object-fit: scale-down", we add an extra CSS rule for the "scale-down"
+# reference cases -- see REPLACEME_SCALE_DOWN_EXTRA_RULE below.)
+
+FILE_PATH="./"
+REFTEST_LIST_FILE="$FILE_PATH/reftest.list"
+
+TEMPLATE_TESTCASE_FILENAME=$FILE_PATH/support/template-object-fit-test.html
+TEMPLATE_REFERENCE_FILENAME=$FILE_PATH/support/template-object-fit-ref.html
+
+imageFileFormat="png"
+
+# Array of image files to use for testing:
+imageFileArr=("support/colors-16x8.png" "support/colors-8x16.png")
+numImageFiles=${#imageFileArr[@]}
+
+# Array of "object-fit" values, & of corresponding "background-size" values.
+# (Note: background-size has no equivalent for "object-fit: scale-down". We use
+# "auto auto" here, which is equivalent *some* of the time; and for the cases
+# where it's *not* equivalent, we use an extra CSS rule in the reference case.
+# See REPLACEME_SCALE_DOWN_EXTRA_RULE below.)
+objectFitArr=( "fill" "contain" "cover" "none" "scale-down" )
+backgroundSizeEquivArr=( "100% 100%" "contain" "cover" "auto auto" "auto auto" )
+numObjectFitVals=${#objectFitArr[@]}
+
+# Array of tag-names for elements that we'd like to test:
+# (Also: array of a single-letter abbreviation for each element, an array of
+# the close tag for each element -- if a close tag is needed -- and an array
+# indicating the attribute that each element uses to specify its image source.)
+tagNameArr=( "embed" "img" "object" "video" )
+tagLetterArr=( "e" "i" "o" "p" )
+tagCloseTokenArr=( "" "" "</object>" "</video>" )
+tagSrcAttrArr=( "src" "src" "data" "poster" )
+numTags=${#tagNameArr[@]}
+
+# FIRST: Add 'default-preferences' line to the top of our reftest manifest:
+echo "default-preferences test-pref(layout.css.object-fit-and-position.enabled,true)
+# Tests for 'object-fit' / 'object-position' with a PNG image" \
+ >> $REFTEST_LIST_FILE
+
+for ((i = 0; i < $numObjectFitVals; i++)); do
+ objectFit=${objectFitArr[$i]}
+ backgroundSizeEquiv=${backgroundSizeEquivArr[$i]}
+
+ # The reference case for "scale-down" needs an additional style rule, to
+ # look like "object-fit: scale-down" on small objects. (This is necessary
+ # because "background-size" doesn't have a value that exactly maps to
+ # "object-fit: scale-down".)
+ if [[ $objectFit == "scale-down" ]]; then
+ scaledownRule=".objectOuter > .small { background-size: contain; }"
+ scaledownSedCmd="s/REPLACEME_SCALE_DOWN_EXTRA_RULE/$scaledownRule/"
+ else
+ # (We're not testing "scale-down" in this generated file, so just delete
+ # the template's placeholder line for a "scale-down"-specific CSS rule.)
+ scaledownSedCmd="/REPLACEME_SCALE_DOWN_EXTRA_RULE/d"
+ fi
+
+ for ((j = 0; j < $numImageFiles; j++)); do
+ imageFile=${imageFileArr[$j]}
+ let testNum=$j+1
+ testNum="00$testNum" # zero-pad to 3 digits, per w3c convention
+
+ filenameStub="object-fit-$objectFit-$imageFileFormat-$testNum"
+
+ # Generate a reference case:
+ filenameRef="$filenameStub-ref.html"
+ echo Generating ${filenameRef}.
+ cat $TEMPLATE_REFERENCE_FILENAME \
+ | sed "s,REPLACEME_IMAGE_FILENAME,$imageFile," \
+ | sed "s/REPLACEME_BACKGROUND_SIZE_VAL/$backgroundSizeEquiv/" \
+ | sed "$scaledownSedCmd" \
+ > $FILE_PATH/$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="'object-fit: $objectFit' on $tagName element, with a PNG image and with various 'object-position' values"
+ 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/$tagSrcAttr/" \
+ | sed "s/REPLACEME_OBJECT_FIT_VAL/$objectFit/" \
+ > $FILE_PATH/$filenameTest
+
+ echo "== $filenameTest $filenameRef" \
+ >> $REFTEST_LIST_FILE
+ done
+ done
+done