public class

DataInteraction

extends Object
java.lang.Object
   ↳ androidx.test.espresso.DataInteraction

Class Overview

An interface to interact with data displayed in AdapterViews.

This interface builds on top of ViewInteraction and should be the preferred way to interact with elements displayed inside AdapterViews.

This is necessary because an AdapterView may not load all the data held by its Adapter into the view hierarchy until a user interaction makes it necessary. Also it is more fluent / less brittle to match upon the data object being rendered into the display then the rendering itself.

By default, a DataInteraction takes place against any AdapterView found within the current screen, if you have multiple AdapterView objects displayed, you will need to narrow the selection by using the inAdapterView method.

The check and perform method operate on the top level child of the adapter view, if you need to operate on a subview (eg: a Button within the list) use the onChildView method before calling perform or check.

Summary

Nested Classes
class DataInteraction.DisplayDataMatcher Internal matcher that is required for onData(Matcher). 
Public Methods
DataInteraction atPosition(Integer atPosition)
Selects the view which matches the nth position on the adapter based on the data matcher.
ViewInteraction check(ViewAssertion assertion)
Performs an assertion on the state of the view after we force the data to be loaded.
DataInteraction inAdapterView(Matcher<View> adapterMatcher)
Selects a particular adapter view to operate on, by default we operate on any adapter view on the screen.
DataInteraction inRoot(Matcher<Root> rootMatcher)
Causes this data interaction to work within the Root specified by the given root matcher.
DataInteraction onChildView(Matcher<View> childMatcher)
Causes perform and check methods to take place on a specific child view of the view returned by Adapter.getView()
ViewInteraction perform(ViewAction... actions)
Performs an action on the view after we force the data to be loaded.
DataInteraction usingAdapterViewProtocol(AdapterViewProtocol adapterViewProtocol)
Use a different AdapterViewProtocol if the Adapter implementation does not satisfy the AdapterView contract like (@code ExpandableListView)
[Expand]
Inherited Methods
From class java.lang.Object

Public Methods

public DataInteraction atPosition (Integer atPosition)

Selects the view which matches the nth position on the adapter based on the data matcher.

Parameters
atPosition Integer
Returns
DataInteraction

public ViewInteraction check (ViewAssertion assertion)

Performs an assertion on the state of the view after we force the data to be loaded.

Parameters
assertion ViewAssertion
Returns
ViewInteraction an ViewInteraction for more assertions or actions.

public DataInteraction inAdapterView (Matcher<View> adapterMatcher)

Selects a particular adapter view to operate on, by default we operate on any adapter view on the screen.

Parameters
adapterMatcher Matcher
Returns
DataInteraction

public DataInteraction inRoot (Matcher<Root> rootMatcher)

Causes this data interaction to work within the Root specified by the given root matcher.

Parameters
rootMatcher Matcher
Returns
DataInteraction

public DataInteraction onChildView (Matcher<View> childMatcher)

Causes perform and check methods to take place on a specific child view of the view returned by Adapter.getView()

Parameters
childMatcher Matcher
Returns
DataInteraction

public ViewInteraction perform (ViewAction... actions)

Performs an action on the view after we force the data to be loaded.

Parameters
actions ViewAction
Returns
ViewInteraction an ViewInteraction for more assertions or actions.

public DataInteraction usingAdapterViewProtocol (AdapterViewProtocol adapterViewProtocol)

Use a different AdapterViewProtocol if the Adapter implementation does not satisfy the AdapterView contract like (@code ExpandableListView)

Parameters
adapterViewProtocol AdapterViewProtocol
Returns
DataInteraction