public void testSetMetadataKey() throws Exception {
XpathQueryImpl query = (XpathQueryImpl) create();
assertNull(query.getMetadataKey());
query.setMetadataKey("key");
assertEquals("key", query.getMetadataKey());
try {
query.setMetadataKey("");
fail();
} catch (IllegalArgumentException expected) {
}
assertEquals("key", query.getMetadataKey());
try {
query.setMetadataKey(null);
fail();
} catch (IllegalArgumentException expected) {
}
assertEquals("key", query.getMetadataKey());
}
