Cypress test consistently crashes Chromium renderer

[james-bartlett]

I'm running into an issue where a single Cypress test will cause the chromium renderer in Electron to crash (almost) every single time.

It shouldn't be an infinite loop because a nearly identical test was having the same problem when using npx cypress open, but managed to complete when using npx cypress run --headed.

Both tests visit a webpage with a table on it, loop through every row of the table, click on the row to open a details page, push some of the fields to a dictionary, and close the details page. If there are multiple pages of the table, the test increments the counter and recursively calls the same function. (The break condition is when the current page is not less than the total number of pages).

The test that consistently crashes has more pages than the one that manages to complete, but the renderer crashes sometimes just on the first page of the table, sometimes on the second, and has never ran long enough to make it to the third.

I've tried closing my other chromium-based browsers, running from powershell directly instead of the terminal inside VS code, running headlessly, but I still can't manage to get the test to complete.

I don't have assertions in here because I'm using the cypress cucumber preprocessor so I can write my specs using Gherkin, and this is my When method. Maybe this is the problem, but I haven't tried refactoring everything into a Mocha format.

// Workaround for Ckeditor bug
cy.on('uncaught:exception', (err, runnable) => {
    return false
});

// Verify page indicator has loaded
cy.get("input.ui-pg-input", { timeout: 100000 }).should("not.have.value", "0").then(currentPage => {
    ViewNotificationTemplates(Number.parseInt(currentPage.val().toString()))
});

function ViewNotificationTemplates(currentPage) {
    // Get table of Notifications
    cy.get("#grid> tbody > tr.jqgrow > td:nth-child(3)", { timeout: 100000 }).then(column => {
        const numberOfRows = column.length;
        // Loop through every row
        for (let i = 2; i <= numberOfRows + 1; i++) {
            // Check that we're on the right page
            cy.get("input.ui-pg-input").then(pageNow => {
                if (Number.parseInt(pageNow.val().toString()) != currentPage)
                    cy.wrap(pageNow).type("{selectAll}{backspace}" + currentPage + "{enter}");
            });
            // Open template
            cy.get(`#grid> tbody > tr.jqgrow:nth-child(${i}) > td:nth-child(3)`).then(element => {
                if (element.text().match(regExPattern)) {
                    cy.wrap(element).click();
                    cy.get("input#name", { timeout: 100000 }).invoke("val").then(name => {
                        cy.get("select#cboPdfTemplates").find(":selected").then(notificationTemplate => {
                            let notificationTemplateText = notificationTemplate.text().trim().toUpperCase();
                            cy.get('#subject').invoke("val").then(subject => {
                                name = name.toString().trim().toUpperCase();
                                subject = subject.toString().trim().toUpperCase();
                                valueArray.push([name, notificationTemplateText, subject]);
                            });
                        });
                        // Close the details page
                        cy.get(".ui-dialog-titlebar-close").click();
                    });
                }
            });
        }
    });
    // Go to next page
    cy.get("#sp_1_grid_pager").should("not.have.text", "0").invoke("text").then(numberOfPages => {
        if (currentPage < Number.parseInt(numberOfPages)) {
            currentPage++;
            cy.get("#next_grid_pager").click();
            ViewNotificationTemplates(currentPage);
        }
    });
}

EDIT: I tried splitting the tests into two separate tests, one per page of the table, but even having both tests in the same spec causes the renderer to crash. If I comment out one of the tests and run the other, it will work, but trying to run both back to back still crashes.

This really feels like a problem with Cypress, maybe in combination with the Cucumber preprocessor, but it doesn't seem like I can run more than one test per spec this way.