class ViewInteraction


Provides the primary interface for test authors to perform actions or asserts on views.

Each interaction is associated with a view identified by a view matcher. All view actions and asserts are performed on the UI thread (thus ensuring sequential execution). The same goes for retrieval of views (this is done to ensure that view state is "fresh" prior to execution of each operation).

Summary

Public functions

ViewInteraction!
check(viewAssert: ViewAssertion!)

Checks the given ViewAssertion on the view selected by the current view matcher.

ViewInteraction!
inRoot(rootMatcher: Matcher<Root!>!)

Makes this ViewInteraction scoped to the root selected by the given root matcher.

ViewInteraction!

Removes the need of waiting for an Activity before performing a ViewAction/ViewAssertion

ViewInteraction!
perform(viewActions: Array<ViewAction!>!)

Performs the given action(s) on the view selected by the current view matcher.

ViewInteraction!

Replaces the default failure handler (@see Espresso.setFailureHandler) with a custom FailureHandler for this particular interaction.

Public functions

check

fun check(viewAssert: ViewAssertion!): ViewInteraction!

Checks the given ViewAssertion on the view selected by the current view matcher.

Parameters
viewAssert: ViewAssertion!

the assertion to check.

Returns
ViewInteraction!

this interaction for further perform/verification calls.

Throws
java.lang.RuntimeException

when being invoked on the main thread.

inRoot

fun inRoot(rootMatcher: Matcher<Root!>!): ViewInteraction!

Makes this ViewInteraction scoped to the root selected by the given root matcher.

noActivity

fun noActivity(): ViewInteraction!

Removes the need of waiting for an Activity before performing a ViewAction/ViewAssertion

perform

fun perform(viewActions: Array<ViewAction!>!): ViewInteraction!

Performs the given action(s) on the view selected by the current view matcher. If more than one action is provided, actions are executed in the order provided with precondition checks running prior to each action.

If the test argument `--enable_testflow_gallery` is present, TestFlowVisualizer captures data for each of the interactions and generates an output artifact for the test run. NOTE, this is an experimental feature.

Parameters
viewActions: Array<ViewAction!>!

one or more actions to execute.

Returns
ViewInteraction!

this interaction for further perform/verification calls.

Throws
java.lang.RuntimeException

when being invoked on the main thread.

withFailureHandler

fun withFailureHandler(failureHandler: FailureHandler!): ViewInteraction!

Replaces the default failure handler (@see Espresso.setFailureHandler) with a custom FailureHandler for this particular interaction.

Parameters
failureHandler: FailureHandler!

a non-null FailureHandler to use to report failures.

Returns
ViewInteraction!

this interaction for further perform/verification calls.