TreeIterables
public
final
class
TreeIterables
extends Object
| java.lang.Object
|
| ↳ |
android.support.test.espresso.util.TreeIterables
|
Utility methods for iterating over tree structured items.
Since the view hierarchy is a tree - having a method of iterating over its contents
is useful.
This is generalized for any object which can display tree like qualities - but this
generalization was done for testability concerns (since creating View hierarchies is a pain).
Only public methods of this utility class are considered public API of the test framework.
Summary
Nested classes |
|---|
class |
TreeIterables.ViewAndDistance
Represents the distance a given view is from the root view.
|
Inherited methods |
|---|
 From
class
java.lang.Object
Object
|
clone()
|
boolean
|
equals(Object arg0)
|
void
|
finalize()
|
final
Class<?>
|
getClass()
|
int
|
hashCode()
|
final
void
|
notify()
|
final
void
|
notifyAll()
|
String
|
toString()
|
final
void
|
wait(long arg0, int arg1)
|
final
void
|
wait(long arg0)
|
final
void
|
wait()
|
|
Public methods
breadthFirstViewTraversal
Iterable<View> breadthFirstViewTraversal (View root)
Returns an iterable which iterates thru the provided view and its children in a
breadth-first, row-level-order traversal. That is to say that for a view such as:
Root
/ | \
A R U
/| |\
B D G N
Will be iterated: Root, A, R, U, B, D, G, N
| Parameters |
|---|
root |
View:
the non-null, root view.
|
depthFirstViewTraversal
Iterable<View> depthFirstViewTraversal (View root)
Returns an iterable which iterates thru the provided view and its children in a
depth-first, in-order traversal. That is to say that for a view such as:
Root
/ | \
A R U
/| |\
B D G N
Will be iterated: Root, A, B, D, R, G, N, U.
| Parameters |
|---|
root |
View:
the non-null, root view.
|
depthFirstViewTraversalWithDistance
Iterable<TreeIterables.ViewAndDistance> depthFirstViewTraversalWithDistance (View root)
Creates an iterable that traverses the tree formed by the given root.
Along with iteration order, the distance from the root element is also tracked.
| Parameters |
|---|
root |
View:
the root view to track from. |
| Returns |
|---|
Iterable<TreeIterables.ViewAndDistance> |
An iterable of ViewAndDistance containing the view tree in a depth first order with
the distance of a given node from the root.
|
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