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Testing

This project uses Cypress for end-to-end testing.

Prerequisites

Make sure dependencies are installed:

pnpm install

Start the Development Server

Tests require the development server to be running on port 8081. Start it before running any tests:

pnpm serve

Keep this running and use a separate terminal for the test commands below.

Running Tests

Headless Mode (CI)

Run all tests in headless mode:

pnpm test

Run a specific test file:

pnpm test -- --spec "cypress/e2e/themes.cy.js"

Interactive Mode

Open the Cypress Test Runner for interactive debugging:

pnpm cypress

This opens a browser where you can select and run individual tests.

Test Structure

Tests are located in cypress/e2e/:

Test File Description
api.cy.js Tests for the AceDiff API methods
basics.cy.js Basic initialization and rendering
blank-lines.cy.js Handling of blank line diffs and merges
diff-granularity.cy.js Broad vs specific diff granularity
issue-93.cy.js Regression test for issue #93
left-to-right.cy.js Left-to-right merge operations
merging.cy.js General merge functionality
newlines.cy.js Handling of different EOL characters
right-to-left.cy.js Right-to-left merge operations
themes.cy.js Light and dark theme CSS verification

Test Fixtures

HTML test fixtures are in test/fixtures/. Each fixture sets up an AceDiff instance with specific content for testing. You can view them directly at http://localhost:8081 when the server is running.