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'use strict';
function test_shorthand_value(property, value, longhands) {
const stringifiedValue = JSON.stringify(value);
for (let longhand of Object.keys(longhands).sort()) {
test(function(){
var div = document.getElementById('target') || document.createElement('div');
div.style[property] = "";
try {
div.style[property] = value;
const readValue = div.style[longhand];
assert_equals(readValue, longhands[longhand], longhand + " should be canonical");
div.style[longhand] = "";
div.style[longhand] = readValue;
assert_equals(div.style[longhand], readValue, "serialization should round-trip");
} finally {
div.style[property] = "";
}
}, "e.style['" + property + "'] = " + stringifiedValue + " should set " + longhand);
}
test(function(){
var div = document.getElementById('target') || document.createElement('div');
div.style[property] = "";
try {
const expectedLength = div.style.length;
div.style[property] = value;
assert_true(CSS.supports(property, value));
for (let longhand of Object.keys(longhands).sort()) {
div.style[longhand] = "";
}
assert_equals(div.style.length, expectedLength);
} finally {
div.style[property] = "";
}
}, "e.style['" + property + "'] = " + stringifiedValue + " should not set unrelated longhands");
}