assert_throws: 'null' allows any exception
assert_throws: 'null' allows any exception

jyasskin/testharness.js,jyasskin/testharness.js,ayg/testharness.js,RatneshThakur/testharness.js,hallvors/testharness.js,zqzhang/testharness.js,bboyle/testharness.js,hallvors/testharness.js