Mobile-specific test cases in Testing Fundamentals - Test Execution Trace

Test Overview

This test checks if a mobile app's login screen works correctly on a smartphone. It verifies that the app opens, the login fields are visible, the user can enter credentials, and the login button works to access the home screen.

Test Code - Appium with unittest

Testing Fundamentals

import unittest
from appium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

class MobileLoginTest(unittest.TestCase):
    def setUp(self):
        desired_caps = {
            "platformName": "Android",
            "deviceName": "Android Emulator",
            "appPackage": "com.example.myapp",
            "appActivity": ".MainActivity",
            "automationName": "UiAutomator2"
        }
        self.driver = webdriver.Remote('http://localhost:4723/wd/hub', desired_caps)

    def test_login_functionality(self):
        wait = WebDriverWait(self.driver, 10)
        # Wait for username field
        username_field = wait.until(EC.presence_of_element_located((By.ID, "com.example.myapp:id/username")))
        self.assertTrue(username_field.is_displayed())
        username_field.send_keys("testuser")

        # Wait for password field
        password_field = wait.until(EC.presence_of_element_located((By.ID, "com.example.myapp:id/password")))
        self.assertTrue(password_field.is_displayed())
        password_field.send_keys("password123")

        # Wait for login button and click
        login_button = wait.until(EC.element_to_be_clickable((By.ID, "com.example.myapp:id/login_button")))
        login_button.click()

        # Verify home screen loaded by checking welcome message
        welcome_msg = wait.until(EC.presence_of_element_located((By.ID, "com.example.myapp:id/welcome_message")))
        self.assertIn("Welcome", welcome_msg.text)

    def tearDown(self):
        self.driver.quit()

if __name__ == '__main__':
    unittest.main()

Execution Trace - 9 Steps

Step	Action	System State	Assertion	Result
1	Test starts and Appium driver launches the Android app on emulator	Android emulator opens with the app's main activity visible	-	PASS
2	Waits for username input field to appear	Login screen shows username field	Check username field is displayed	PASS
3	Enters 'testuser' into username field	Username field contains 'testuser'	-	PASS
4	Waits for password input field to appear	Login screen shows password field	Check password field is displayed	PASS
5	Enters 'password123' into password field	Password field contains 'password123'	-	PASS
6	Waits for login button to be clickable	Login button is visible and enabled	Check login button is clickable	PASS
7	Clicks the login button	App navigates to home screen	-	PASS
8	Waits for welcome message on home screen	Home screen shows welcome message	Verify welcome message text contains 'Welcome'	PASS
9	Test ends and Appium driver quits	App closed, emulator ready for next test	-	PASS

Failure Scenario

Failing Condition: Login button is not found or not clickable within 10 seconds

Execution Trace Quiz - 3 Questions

What does the test verify after clicking the login button?

A The username field is cleared

B The home screen shows a welcome message

C The app closes automatically

D The password field becomes hidden

Key Result

Always wait explicitly for mobile app elements to appear or become clickable before interacting to avoid flaky tests caused by slow loading or animations.