Fix pipeline snapshot test race condition

Wait for the PUT response in savePipeline() before reading the file,
ensuring the server has written it to disk. Also dismiss the context
menu after the last addFileToPipeline call to prevent stale menu
interactions during node property configuration.

Signed-off-by: Luciano Resende <lresende@apple.com>

Author: lresende

cypress/support/commands.ts

@@ -203,8 +203,10 @@ Cypress.Commands.add('dragAndDropFileToPipeline', (name: string) => {
 });
 
 Cypress.Commands.add('savePipeline', (): void => {
+  cy.intercept('PUT', '**/api/contents/**').as('savePipelineFile');
   cy.findByRole('button', { name: /save pipeline/i }).click();
-  // Wait for the document to register as saved
+  // Wait for the server to finish writing the file to disk
+  cy.wait('@savePipelineFile');
   cy.get('.jp-Document:not(.jp-mod-dirty)', { timeout: 10000 }).should('exist');
 });
 

cypress/tests/pipeline.cy.ts

@@ -181,6 +181,9 @@ describe('Pipeline Editor tests', () => {
     cy.addFileToPipeline('create-source-files.py');
     cy.addFileToPipeline('producer-script.py');
 
+    // Ensure context menu is dismissed and all nodes are on canvas
+    cy.get('.lm-Menu').should('not.exist');
+
     cy.get('#jp-main-dock-panel').within(() => {
       // producer props
       cy.findByText('producer.ipynb').rightclick();