<!DOCTYPE html>
<title>DOMStringList interface</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
// Returns a promise that will resolve to a DOMStringList.
// Strings must be unique, and the strings will be sorted.
function makeDOMStringList(entries) {
return new Promise(function(resolve, reject) {
var dbname = String(self.location);
var r = indexedDB.open(dbname);
r.onerror = function() { reject(r.error); };
r.onupgradeneeded = function() {
var db = r.result;
entries.forEach(function(entry) {
db.createObjectStore(entry);
});
}
r.onsuccess = function() {
var db = r.result;
var dsl = db.objectStoreNames;
db.close();
var r2 = indexedDB.deleteDatabase(dbname);
r2.onerror = function() { reject(r2.error); };
r2.onsuccess = function() { resolve(dsl); };
}
});
}
promise_test(function(t) {
return makeDOMStringList(['a', 'b', 'c'])
.then(function(dsl) {
assert_equals(Object.prototype.toString.call(dsl),
'[object DOMStringList]',
'Object should be branded as "DOMStringList"');
assert_true('length' in dsl && typeof dsl.length === 'number',
'DOMStringList should have length attribute');
assert_true('item' in dsl && typeof dsl.item === 'function',
'DOMStringList should have item method');
assert_true('contains' in dsl && typeof dsl.contains === 'function',
'DOMStringList should have contains method');
assert_equals(dsl.length, 3, 'length attribute');
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_throws_js(
TypeError, function() { dsl.item(); },
'item method should throw if called without enough args');
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_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, function(){ dsl.contains(); },
'contains method should throw if called without enough args');
});
}, 'DOMStringList interface');
</script>
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