Java Reference
In-Depth Information
C
LICK
NAVIGATION
The
click
and
dblClick
methods conveniently navigate through a link or any click-
able user interface element. For example, continuing from the previous example, we
enter a web query and click the Search button:
HtmlForm form = page.getFormByName("f");
HtmlTextInput queryText = (HtmlTextInput) form.getInputByName("q");
queryText.setValueAttribute("Manning Publications Co.");
HtmlSubmitInput searchButton = (HtmlSubmitInput) form.getInputByName("btnG");
HtmlPage resultPage = (HtmlPage) searchButton.click();
You can call the
click
and
dblClick
methods on all classes descending from
Html-
Element
. Click methods simulate clicking an element (remember, HtmlUnit is an
emulator) and return the page in the window that has the focus after the element has
been clicked.
The
HTML
4.01 specification
9
defines clickable
HTML
elements.
HtmlElement
is
the base class for all
HTML
elements except frame and iframe.
See the
HtmlElement
Javadoc
10
or select
HtmlElement
in Eclipse and hit F4 to dis-
play the class hierarchy.
K
EYBOARD
NAVIGATION
To simulate the user hitting the Enter key instead of clicking the Search button,
replace getting and clicking the search button with the following:
HtmlPage resultPage = (HtmlPage) queryText.type('\n');
You can code the Enter key with the
'\n'
character. You can also simulate the user
tabbing around the page with the HtmlPage methods
tabToNextElement
and
tabTo-
PreviousElement
. Hitting the Enter key or any key may not be enough or the right
process to test. You can set the focus to any element with the HtmlPage method
set-
FocusedElement
. Be aware that this will trigger any
onfocus
and
onblur
event han-
dlers. Let's now put these concepts together with another example and test forms.
12.3.12 Testing forms with HtmlUnit
HTML
form support is built into the HtmlPage
API
, where form elements can be
accessed with
getForms
(returns
List<HtmlForm>
) to get all form elements and
get-
FormByName
to get the first HtmlForm with a given name. You can call one of the Html-
Form
getInput
methods to get
HTML
input elements and then simulate user input
with
setValueAttribute
.
The following example focuses on the HtmlUnit mechanics of driving a form.
First, we create a simple page to display a form with an input field and Submit button.
We include form validation via JavaScript alerts in listing 12.5 as a second path to test.
The section “Testing JavaScript alerts” describes this in more detail.
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