/**
* Test removeAttribute(Serializable key), when key is null, IllegalArgumentException is expected.
*/
public void testRemoveAttribute_KeyIsNull() {
try {
tester.removeAttribute(null);
fail("when key is null, IllegalArgumentException is expected.");
} catch (IllegalArgumentException e) {
// good
}
}
/**
* Test setAttribute(Serializable key, Serializable value), when value is null,
* IllegalArgumentException is expected.
*/
public void testSetAttribute_ValueIsNull() {
try {
tester.setAttribute("key", null);
fail("when value is null, IllegalArgumentException is expected.");
} catch (IllegalArgumentException e) {
// good
}
}