angular/components

bug(MatTree): MatTreeHarness with NestedTreeControl returns wrong structure

Chiusa

#23.881 aperta il 3 nov 2021

Vedi su GitHubGuida contributor
 (2 commenti) (0 reazioni) (0 assegnatari)TypeScript (6650 fork)batch import
P3area: cdk/treehelp wanted

Metriche repository

Star
 (24.044 stelle)
Metriche merge PR
 (Merge medio 3g 12h) (98 PR mergiate in 30 g)

Descrizione

Reproduction

Steps to reproduce:

  1. Create a MatTreeComponent with a NestedTreeControl and MatTreeNestedDatasource
  2. Test the component structure

https://stackblitz.com/edit/harness-issue-xgqlpl?file=src/app/tree-harness-example.spec.ts

Expected Behavior

The structure should have as many children (2 in the Stackblitz example) as visible Nodes.

{ children: [ { text: "Group 1"}, { text: "Group 2"} ] }

Actual Behavior

The structure has only one children without text.

{ children: [ { text: ""} ] }

Environment

  • Angular: 12.2.12
  • CDK/Material: 12.2.12
  • Browser(s): Test Environment
  • Operating System (e.g. Windows, macOS, Ubuntu): Windows

Guida contributor

Direzione di ricerca
Examine the MatTreeHarness class and its getStructure method in the Angular Material source code. The reproduction demonstrates that for a NestedTreeControl, the structure only returns one child with empty text. Compare the implementation for NestedTreeControl versus FlatTreeControl. The fix likely involves correctly traversing the tree nodes using the control's expand and children accessors. Refer to the Stackblitz for exact setup.
Tech stack
typescriptangularhtml
Dominio
frontendtesting
Tipo issue
Bug
DifficoltàQuanto dovrebbe essere impegnativa per un nuovo contributor.
3
Tempo stimatoTempo stimato per completare e verificare uno scope piccolo.
1-3 ore
Stato attivitàQuanto è probabile che la issue sia ancora attiva e reviewable.
Datata
ChiarezzaQuanto chiaramente la issue descrive problema, scope e risultato atteso.
Chiara
Prerequisiti
Angular MaterialComponent test harnessesMatTree
Adatta ai principiantiQuanto la issue è adatta a contributor alla prima esperienza.
30