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<!doctype html>
<title>DOMStringList</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
// Returns a promise that resolves to a DOMStringList with
// the requested entries. Relies on Indexed DB.
function createDOMStringList(entries) {
return new Promise((resolve, reject) => {
const dbname = String(self.location + Math.random());
const request = indexedDB.open(dbname);
request.onerror = () => reject(request.error);
request.onupgradeneeded = () => {
const db = request.result;
entries.forEach(entry => db.createObjectStore(entry));
const dsl = db.objectStoreNames;
resolve(dsl);
request.transaction.abort();
}
});
}
function dsl_test(entries, func, description) {
promise_test(t => createDOMStringList(entries).then(dsl => func(t, dsl)),
description);
}
dsl_test(['a', 'b', 'c'], (t, dsl) => {
assert_equals(dsl.length, 3, 'length attribute');
}, 'DOMStringList: length attribute');
dsl_test(['a', 'b', 'c'], (t, dsl) => {
assert_equals(dsl.item(0), 'a', 'item method');
assert_equals(dsl.item(1), 'b', 'item method');
assert_equals(dsl.item(2), 'c', 'item method');
assert_equals(dsl.item(3), null, 'item method out of range');
assert_equals(dsl.item(-1), null, 'item method out of range');
assert_throws_js(TypeError, () => dsl.item(),
'item method should throw if called without enough args');
}, 'DOMStringList: item() method');
dsl_test(['a', 'b', 'c'], (t, dsl) => {
assert_equals(dsl[0], 'a', 'indexed getter');
assert_equals(dsl[1], 'b', 'indexed getter');
assert_equals(dsl[2], 'c', 'indexed getter');
assert_equals(dsl[3], undefined, 'indexed getter out of range');
assert_equals(dsl[-1], undefined, 'indexed getter out of range');
}, 'DOMStringList: indexed getter');
dsl_test(['a', 'b', 'c'], (t, dsl) => {
assert_true(dsl.contains('a'), 'contains method matched');
assert_true(dsl.contains('b'), 'contains method matched');
assert_true(dsl.contains('c'), 'contains method matched');
assert_false(dsl.contains(''), 'contains method unmatched');
assert_false(dsl.contains('d'), 'contains method unmatched');
assert_throws_js(TypeError, () => dsl.contains(),
'contains method should throw if called without enough args');
}, 'DOMStringList: contains() method');
</script>
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