``` Node 1 at 0 0 66 0 1080 0 2009 0 px | Node 2 at 970 0 11

Question

``` Node 1 at 0 0 66 0 1080 0 2009 0 px | Node 2 at 970 0 110 0 1036 0 176 0 px | OnClick = AccessibilityAction label=null action=Function0 lt java lang Boolean gt | MergeDescendants = true | Node 3 at 0 0 220 0 1080 0 2009 0 px VerticalAccessibilityScrollState = AccessibilityScrollState value=0 0 maxValue=0 0 reverseScrolling=false ScrollBy = AccessibilityAction label=null action=Function2 lt java lang Float java lang Float java lang Boolean gt | Node 4 at 44 0 1089 0 368 0 1152 0 px Tag Section Header | Text = Section Header | GetTextLayoutResult = AccessibilityAction label=null action= kotlin collections MutableList lt androidx compose ui text TextLayoutResult gt gt kotlin Boolean | Node 7 at 44 0 1196 0 1036 0 1423 0 px | OnClick = AccessibilityAction label=null action=Function0 lt java lang Boolean gt | MergeDescendants = true | | Node 8 at 88 0 1229 0 201 0 1283 0 px Tag Title 1 | | Text = Title 1 | | GetTextLayoutResult = AccessibilityAction label=null action= kotlin collections MutableList lt androidx compose ui text TextLayoutResult gt gt kotlin Boolean | | Node 11 at 88 0 1289 0 794 0 1379 0 px | Text = Get the list of all the assigned tasks in serial order to complete | GetTextLayoutResult = AccessibilityAction label=null action= kotlin collections MutableList lt androidx compose ui text TextLayoutResult gt gt kotlin Boolean | Node 13 at 44 0 1467 0 1036 0 1694 0 px | OnClick = AccessibilityAction label=null action=Function0 lt java lang Boolean gt | MergeDescendants = true | | Node 14 at 88 0 1500 0 201 0 1554 0 px Tag Title 2 | | Text = Title 2 | | GetTextLayoutResult = AccessibilityAction label=null action= kotlin collections MutableList lt androidx compose ui text TextLayoutResult gt gt kotlin Boolean | | Node 17 at 88 0 1560 0 794 0 1650 0 px | Text = Perform all IoT actions and QC of all devices in the car | GetTextLayoutResult = AccessibilityAction label=null action= kotlin collections MutableList lt androidx compose ui text TextLayoutResult gt gt kotlin Boolean | Node 19 at 44 0 1738 0 1036 0 1965 0 px OnClick = AccessibilityAction label=null action=Function0 lt java lang Boolean gt MergeDescendants = true | Node 20 at 88 0 1771 0 201 0 1825 0 px Tag Title 3 | Text = Title 3 | GetTextLayoutResult = AccessibilityAction label=null action= kotlin collections MutableList lt androidx compose ui text TextLayoutResult gt gt kotlin Boolean | Node 23 at 88 0 1831 0 794 0 1921 0 px Text = Get the list of all the assigned tasks in serial order to complete GetTextLayoutResult = AccessibilityAction label=null action= kotlin collections MutableList lt androidx compose ui text TextLayoutResult gt gt kotlin Boolean ``` The following test fails even though you can clearly see in the tree that there are Nodes with Tags `Section Header` and `Title 1` ```fun apiSuccess showFeatures Unit = testCoroutineDispatcher runBlockingTest composeTestRule onRoot useUnmergedTree = true printToLog TAG composeTestRule onNodeWithTag Section Header assertIsDisplayed composeTestRule onNodeWithTag Title 1 assertIsDisplayed ``` If I just test with the following single assertion the test passes ```composeTestRule onNodeWithTag Section Header assertIsDisplayed ``` Any idea on what am I doing wrong

Arun · Answer

Apologies for such a long post here

jim · Answer

cc < Filip Pavlis>

Filip Pavlis · Answer

The reason here is that the node with Title 1 tag gets merged into the parent you can see that the parent defines MergeDescendants When we merge a child into its parent we throw away child s test tag We don t want parents to be annotated by child test tags as it might confuse you on what elements you are dealing with The reason the printing worked for you is because you passed `useUnmergedTree = true` If you would pass this to the `onNodeWithTag` as well it would actually find you the element Here is the piece of code that defines the merging policy ```val TestTag = SemanticsPropertyKey lt String gt name = TestTag mergePolicy = parentValue gt Never merge TestTags to avoid leaking internal test tags to parents parentValue ``` This is actually also good feedback for us We might be able to check that the tag exists in the unmerged tree and throw an error that would explain this properly

Arun · Answer

Got it Thanks for the great explanation