Handling complex test scenarios and edge cases

Handle complex test scenarios and edge cases by using proven test strategies. Ensure that your tests cover unexpected inputs, concurrency issues and boundary conditions.

Examples

// Example 1: Handling null inputs
public void testNullInput() {
    String input = null;
    try {
        processInput(input);
    } catch (NullPointerException e) {
        System.out.println("Handled null input: " + e.getMessage());
    }
}

// Example 2: Testing concurrency issues
public void testConcurrency() throws InterruptedException {
    Runnable task = () -> {
        try {
            System.out.println("Running task");
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    };
    Thread thread1 = new Thread(task);
    Thread thread2 = new Thread(task);
    thread1.start();
    thread2.start();
    thread1.join();
    thread2.join();
    System.out.println("Handled concurrency issues");
}

// Example 3: Checking boundary conditions
public void testBoundaryConditions() {
    int[] testValues = {Integer.MIN_VALUE, -1, 0, 1, Integer.MAX_VALUE};
    for (int value : testValues) {
        try {
            // processBoundaryValue(value);
            System.out.println("Processed value: " + value);
        } catch (Exception e) {
            System.out.println("Boundary condition error for value: " + value);
        }
    }
}

FAQ (interview questions and answers)

1. Why is it important to handle null inputs in test scenarios?
   To increase test complexity
   To prevent null pointer exceptions
   To ignore invalid inputs
   
2. What is a common issue when testing concurrency?
   Longer execution time
   Race conditions
   Larger memory usage
   
3. How do you handle boundary conditions in tests?
   By testing min and max values
   By ignoring edge cases
   By only testing typical values
   
4. Why are edge cases significant in testing?
   They reveal potential flaws
   They simplify testing
   They are uncommon
   
5. When should concurrency tests be performed?
   Only for large applications
   Never, concurrency is not an issue
   For any multi-threaded code
   

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