The support module webtester-support-hamcrest provides Hamcrest Matcher implementations for many properties of page
fragments:
AttributeMatcherAttributeValueMatcherButtonLabelMatcherDisabledMatcherEnabledMatcherInvisibleMatcherNoOptionsMatcherNoSelectedOptionsMatcherNumberOfOptionsMatcherNumberOfSelectedOptionsMatcherOptionsMatcherOptionsTextsMatcherOptionsValuesMatcherPresentMatcherSelectedMatcherSelectedOptionsMatcherSelectionIndexMatcherSelectionIndicesMatcherSelectionTextMatcherSelectionTextsMatcherSelectionValueMatcherSelectionValuesMatcherTagMatcherTextContainingMatcherTextMatcherVisibleMatcherVisibleTextContainingMatcherVisibleTextMatcher
All of these can be accessed through a single utility class named WebTesterMatchers. Which extends Hamcres's Matchers
class and therefore provides all of Hamcrest's default matchers as well.
TextField username = ...;
// without static imports
WebTesterMatchers.assertThat(username, WebTesterMatchers.has(WebTesterMatchers.text("fooUser")));
// with static imports
assertThat(username, has(text("fooUser")));