Playwright Test

Instructions

Create Playwright integration tests for Vaadin views on the use case $ARGUMENTS. Playwright tests run in a real browser against a running application.

DO NOT

• Use Mockito for mocking
• Access services, repositories, or DSLContext directly
• Delete all data in cleanup (only remove data created during the test)
• Forget to wait for Vaadin connections to settle after interactions
• Assume all grid rows are rendered (viewport limits visible rows)

Test Data Strategy

Use existing test data from Flyway migrations in src/test/resources/db/migration.

Approach	Location	Purpose
Flyway migration	src/test/resources/db/migration/V*.sql	Existing test data
Manual cleanup	@AfterEach method	Remove test-created data

Test Class Structure

Extend from PlaywrightIT base class.

Template

Use templates/ExampleViewIT.java as the test class structure.

Key Classes

Class	Purpose
GridPw	Grid interactions and assertions
page	Playwright Page object for navigation
mopo	Vaadin connection helper

Common Patterns

Navigate to View

page.navigate("http://localhost:%d/persons".formatted(localServerPort));

Wait for Vaadin Connection

Always wait after interactions that trigger server communication:

mopo.waitForConnectionToSettle();

Grid Operations

GridPw gridPw = new GridPw(page);

// Get rendered row count (viewport limited!)
int count = gridPw.getRenderedRowCount();

// Get specific row
GridPw.RowPw row = gridPw.getRow(0);

// Get cell text
String text = row.getCell(0).innerText();

// Select row
row.select();
mopo.waitForConnectionToSettle();

Locate Vaadin Components

// Text field by label
Locator nameField = page.locator("vaadin-text-field")
                .filter(new Locator.FilterOptions().setHasText("Name"))
                .locator("input");

// Button by text
Locator saveButton = page.locator("vaadin-button")
        .filter(new Locator.FilterOptions().setHasText("Save"));

// ComboBox
Locator comboBox = page.locator("vaadin-combo-box")
        .filter(new Locator.FilterOptions().setHasText("Country"));

Form Interactions

// Get input value
String value = nameField.inputValue();

// Fill text field
nameField.fill("New Value");

// Click button
saveButton.click();
mopo.waitForConnectionToSettle();

// Clear and fill
nameField.clear();
nameField.fill("Updated Value");

ComboBox Interactions

// Open and select
comboBox.click();
page.locator("vaadin-combo-box-item")
    .filter(new Locator.FilterOptions().setHasText("Option 1"))
    .click();
mopo.waitForConnectionToSettle();

Dialog Interactions

// Confirm dialog
page.locator("vaadin-confirm-dialog")
    .locator("vaadin-button")
    .filter(new Locator.FilterOptions().setHasText("Confirm"))
    .click();
mopo.waitForConnectionToSettle();

Assertions Reference

Use AssertJ assertions:

Assertion Type	Example
Text content	assertThat(row.getCell(0).innerText()).isEqualTo("x")
Input value	assertThat(field.inputValue()).isEqualTo("value")
Row count	assertThat(gridPw.getRenderedRowCount()).isGreaterThan(0)
Visibility	assertThat(element.isVisible()).isTrue()
Enabled	assertThat(element.isEnabled()).isTrue()

Viewport Considerations

Playwright tests run in a real browser with viewport constraints:

• Not all grid rows may be rendered
• Use isGreaterThan() instead of exact counts for grids
• Scroll if needed to access off-screen elements

Workflow

1. Read the use case specification
2. Use TodoWrite to create a task for each test scenario
3. Create test class extending PlaywrightIT
4. For each test:
   • Navigate to the view
   • Wait for connection to settle
   • Locate components using Vaadin selectors
   • Perform interactions (always wait after)
   • Assert expected outcomes
   • Clean up test data if created during test
5. Run tests to verify they pass
6. If a test fails:
   • Verify the view loaded correctly (check page URL and title)
   • Ensure mopo.waitForConnectionToSettle() is called after every interaction
   • Check that test data exists in the Flyway test migrations
   • For grid assertions, use isGreaterThan() instead of exact counts
7. Mark todos complete