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/**
* Runs tests for <https://webidl.spec.whatwg.org/#es-stringifier>.
* @param {Object} aObject - object to test
* @param {string} aAttribute - IDL attribute name that is annotated with `stringifier`
* @param {boolean} aIsUnforgeable - whether the IDL attribute is `[LegacyUnforgeable]`
*/
function test_stringifier_attribute(aObject, aAttribute, aIsUnforgeable) {
// Step 1.
test(function() {
[null, undefined].forEach(function(v) {
assert_throws_js(TypeError, function() {
aObject.toString.call(v);
});
});
});
// TODO Step 2: security check.
// Step 3.
test(function() {
assert_false("Window" in window && aObject instanceof window.Window);
[{}, window].forEach(function(v) {
assert_throws_js(TypeError, function() {
aObject.toString.call(v)
});
});
});
// Step 4-6.
var expected_value;
test(function() {
expected_value = aObject[aAttribute];
assert_equals(aObject[aAttribute], expected_value,
"The attribute " + aAttribute + " should be pure.");
});
var test_error = { name: "test" };
test(function() {
if (!aIsUnforgeable) {
Object.defineProperty(aObject, aAttribute, {
configurable: true,
get: function() { throw test_error; }
});
}
assert_equals(aObject.toString(), expected_value);
});
test(function() {
if (!aIsUnforgeable) {
Object.defineProperty(aObject, aAttribute, {
configurable: true,
value: { toString: function() { throw test_error; } }
});
}
assert_equals(aObject.toString(), expected_value);
});
}
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