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hidden_dom_1_test.dart
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#library('HiddenDom1Test');
#import('../../pkg/unittest/unittest.dart');
#import('../../pkg/unittest/html_config.dart');
#import('dart:html');
// Test that the dart:html API does not leak native jsdom methods:
// onfocus setter.
main() {
useHtmlConfiguration();
test('test1', () {
document.body.elements.add(new Element.html(@'''
<div id='div1'>
Hello World!
</div>'''));
Element e = document.query('#div1');
Expect.isTrue(e != null);
checkNoSuchMethod(() { confuse(e).onfocus = null; });
});
}
class Decoy {
void set onfocus(x) { throw 'dead code'; }
}
confuse(x) => opaqueTrue() ? x : (opaqueTrue() ? new Object() : new Decoy());
/** Returns [:true:], but in a way that confuses the compiler. */
opaqueTrue() => true; // Expand as needed.
checkNoSuchMethod(action()) {
var ex = null;
try {
action();
} catch (e) {
ex = e;
}
if (ex === null)
Expect.fail('Action should have thrown exception');
Expect.isTrue(ex is NoSuchMethodError, 'ex is NoSuchMethodError');
}