- Test Case: Verify UI Elements Existence
test('UI Elements Existence', () => {
const header = document.getElementById('header');
const sidebar = document.getElementById('sidebar');
const mainContent = document.getElementById('main-content');
// Assertion
expect(header).toBeDefined();
expect(sidebar).toBeDefined();
expect(mainContent).toBeDefined();
});
Explanation: This test ensures that essential UI elements, such as the header, sidebar, and main content, exist on the page.
- Test Case: Validate Form Input
test('Form Input Validation', () => {
const nameInput = document.getElementById('name-input');
nameInput.value = 'John Doe';
// Trigger change event to simulate user input
TestLib.fireEvent(nameInput, 'change');
// Assertion
expect(nameInput.value).toBe('John Doe');
});
Explanation: This test case, often a topic where students seek software engineering assignment help, focuses on validating form input functionality. It simulates user input in the name field and verifies that the entered value is correctly captured.
- Test Case: Test Button Click Functionality
test('Button Click Functionality', () => {
const button = document.getElementById('submit-button');
// Trigger click event
TestLib.fireEvent(button, 'click');
// Assertion
// Add relevant assertions here to verify the expected behavior after button click.
});
Explanation: This test case examines the button click functionality. It verifies that clicking the submit button triggers the expected action.
- Test Case: Validate Error Messages
test('Error Message Display', () => {
const emailInput = document.getElementById('email-input');
emailInput.value = 'invalid-email';
// Trigger blur event to validate input and display error message
TestLib.fireEvent(emailInput, 'blur');
// Assertion
expect(document.getElementById('error-message').innerText).toBe('Invalid email address');
});
Explanation: Error message display is crucial for providing feedback to users. This test checks if error messages are shown correctly when invalid data is entered into an input field.
- Test Case: Test Dropdown Selection
test('Dropdown Selection', () => {
const dropdown = document.getElementById('select-dropdown');
dropdown.value = 'option2';
// Trigger change event to simulate user selection
TestLib.fireEvent(dropdown, 'change');
// Assertion
// Add relevant assertions here to verify the expected behavior after dropdown selection.
});
Explanation: Dropdowns are commonly used UI elements. This test ensures that selecting an option from the dropdown updates the underlying data as expected.
- Test Case: Test Modal Popup
test('Modal Popup', () => {
const openModalButton = document.getElementById('open-modal-button');
// Trigger click event
TestLib.fireEvent(openModalButton, 'click');
// Assertion
expect(document.getElementById('modal-container').style.display).toBe('block');
});
Explanation: This test checks the functionality of modal popups. It verifies that the modal popup opens correctly when triggered.
- Test Case: Test Data Loading
test('Data Loading', () => {
// Simulate data loading
const testData = { name: 'Test User', age: 25 };
loadData(testData);
// Assertion
expect(document.getElementById('name').innerText).toBe('Test User');
expect(document.getElementById('age').innerText).toBe('25');
});
Explanation: In this scenario, we test data loading functionality by simulating data retrieval and ensuring that it is correctly displayed in the UI.
- Test Case: Test Sorting Function
test('Sorting Function', () => {
const data = [5, 2, 8, 3, 1];
const sortedData = sortData(data);
// Assertion
expect(sortedData).toEqual([1, 2, 3, 5, 8]);
});
Explanation: Sorting functions are essential for presenting data in a meaningful way. This test verifies if the sorting function produces the expected output.
- Test Case: Test Image Loading
test('Image Loading', () => {
const imageElement = document.getElementById('profile-image');
// Assertion
expect(imageElement.complete).toBe(true);
expect(imageElement.naturalWidth).toBeGreaterThan(0);
});
Explanation: Images are a common element in UI. This test case checks if images are loaded correctly and appear on the page.
- Test Case: Test Responsive Design
test('Responsive Design', () => {
// Set the window size to a specific resolution
TestLib.setWindowSize(768, 1024);
// Assertion
// Add relevant assertions here to check if the UI components are correctly positioned for the specified resolution.
});
Explanation: With various screen sizes and devices, responsive design is crucial. This test ensures that the UI adapts correctly to different resolutions.
Conclusion:
Properly testing the UI is fundamental to delivering a seamless user experience and identifying potential issues in your software design. By incorporating these ten test cases into your UI testing strategy, you can significantly improve the quality and reliability of your application. Remember that a well-tested UI not only boosts user satisfaction but also builds trust and credibility for your brand. So, embrace the art of testing and ensure that your application stands strong in the face of real-world usage. Happy testing!