Java Reference
In-Depth Information
Listing 12.10
Custom alert handler
client.setAlertHandler(
new
AlertHandler() {
public void
handleAlert(
final
Page page,
final
String message) {
fail("JavaScript alert: " + message);
}
});
You can apply the same principles to test JavaScript confirm calls by installing a con-
firm handler in the web client with
setConfirmHandler
.
12.3.15 Testing CSS
You can toggle
CSS
support on and off in a web client by calling
setCssEnabled
. By
default, HtmlUnit enables
CSS
support.
When calling
API
s, the standard HtmlUnit behavior is to throw an exception when
encountering a problem. In contrast, when HtmlUnit detects a
CSS
problem, it
doesn't throw an exception; instead, it reports problems to the log through the
Apache Commons Logging
11
library. You can customize this behavior in a
WebClient
with an
org.w3c.css.sac.ErrorHandler
. Two
ErrorHandler
implementations are
provided with HtmlUnit:
■
DefaultCssErrorHandler
is the default handler and logs all
CSS
problems.
■
SilentCssErrorHandler
ignores all
CSS
problems.
To install an error handler, use the
setCssErrorHandler
method on a web client. For
example, the following causes all
CSS
problems to be ignored:
webClient.setCssErrorHandler(
new
SilentCssErrorHandler());
If you want any
CSS
problem to cause test failures, create an error handler that always
rethrows the
CSSException
it's given.
12.3.16 SSL errors
You'll find that many websites have expired or incorrectly configured
SSL
certifi-
cates. By default, the Java runtime throws exceptions if it detects errors. If this gets
in the way of your testing, you can call
WebClient.setUseInsecureSSL(true)
to
allow the test to proceed. Using this
API
causes HtmlUnit to use an insecure
SSL
han-
dler, which trusts everyone.
Now, that we've covered testing from the client point of view, let's go to the
server side and examine how HtmlUnit can be used for in-container testing with
the Cactus framework.
11
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