Integration testing in Testing Fundamentals - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to call the integration test function.

Testing Fundamentals

def test_integration():
    result = [1]()
    assert result == 'success'

Drag options to blanks, or click blank then click option'

Arun_integration_test

Bmock_test

Cunit_test

Dintegration_test

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a unit test function instead of integration test.

The function integration_test() is the correct call for integration testing.

2fill in blank

medium

Complete the code to check if the integration test passed.

Testing Fundamentals

def check_result(output):
    if output [1] 'success':
        return True
    return False

Drag options to blanks, or click blank then click option'

A==

B!=

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '==' causes wrong test results.

We use == to check if the output equals 'success'.

3fill in blank

hard

Fix the error in the integration test assertion.

Testing Fundamentals

def test_integration():
    output = integration_test()
    assert output [1] 'success'

Drag options to blanks, or click blank then click option'

A=

B==

C!=

D=>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' instead of '==' in assert causes syntax error.

The assertion requires the equality operator ==, not assignment =.

4fill in blank

hard

Fill both blanks to create a dictionary of test results where keys are test names and values are their statuses.

Testing Fundamentals

test_results = {"login": [1], "payment": [2]

Drag options to blanks, or click blank then click option'

A'passed'

B'failed'

C'success'

D'error'

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up test names and statuses.

The login test passed, so its value is 'passed'. The payment test failed, so its value is 'failed'.

5fill in blank

hard

Fill both blanks to create a filtered dictionary of tests that passed.

Testing Fundamentals

passed_tests = {k: v for k, v in test_results.items() if v {BLANK_2}} {{BLANK_2}}

Drag options to blanks, or click blank then click option'

A:

B==

C'passed'

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong operators or missing quotes around 'passed'.

The dictionary comprehension uses ':' to map keys to values, and filters where value equals 'passed'.

Practice

1. What is the main purpose of integration testing in software development?

easy

A. To test the software's performance under load

B. To test individual functions or methods in isolation

C. To verify the final system meets user requirements

D. To check if different modules work together correctly

Solution

1. Step 1: Understand integration testing scope

   Integration testing focuses on testing combined parts or modules of software to ensure they work together.

2. Step 2: Differentiate from other testing types

   Unit testing checks individual parts, system testing checks the whole system, and performance testing checks speed/load.

3. Final Answer:

   To check if different modules work together correctly -> Option D

4. Quick Check:

   Integration testing = module interaction check [OK]

Hint: Integration testing checks module connections, not single parts [OK]

Common Mistakes:

• Confusing integration testing with unit testing
• Thinking integration testing is the final system test
• Mixing integration testing with performance testing

2. Which of the following is the correct sequence of testing phases including integration testing?

easy

A. Integration testing -> Unit testing -> System testing

B. Unit testing -> Integration testing -> System testing

C. System testing -> Integration testing -> Unit testing

D. System testing -> Unit testing -> Integration testing

Solution

1. Step 1: Recall testing order

   Unit testing is done first on individual parts, then integration testing checks combined parts, finally system testing checks the whole system.

2. Step 2: Match sequence with options

   Only Unit testing -> Integration testing -> System testing correctly shows Unit testing -> Integration testing -> System testing.

3. Final Answer:

   Unit testing -> Integration testing -> System testing -> Option B

4. Quick Check:

   Testing order = Unit -> Integration -> System [OK]

Hint: Remember testing flows from small parts to whole system [OK]

Common Mistakes:

• Mixing up the order of testing phases
• Thinking integration testing comes after system testing
• Assuming unit testing is last

3. Consider two modules: ModuleA returns a number, and ModuleB doubles that number. Which integration test output is correct if ModuleA returns 5?

medium

A. 10

B. 5

C. 25

D. Error

Solution

1. Step 1: Understand module behavior

   ModuleA returns 5; ModuleB doubles input, so it should return 5 * 2 = 10.

2. Step 2: Determine integration output

   When ModuleB receives 5 from ModuleA, output is 10, so integration test should expect 10.

3. Final Answer:

   10 -> Option A

4. Quick Check:

   5 doubled = 10 [OK]

Hint: Multiply ModuleA output by 2 for ModuleB result [OK]

Common Mistakes:

• Confusing input and output values
• Multiplying instead of doubling
• Expecting original value without processing

4. You wrote an integration test for two modules, but the test fails with a null pointer error. What is the most likely cause?

medium

A. Modules are not properly connected or data is missing between them

B. Unit tests for each module passed successfully

C. The system testing phase was skipped

D. The test environment has too much memory

Solution

1. Step 1: Analyze null pointer error in integration

   Null pointer errors usually happen when one module expects data from another but receives nothing or null.

2. Step 2: Connect error to module interaction

   If modules are not properly connected or data is missing, integration test fails with null pointer.

3. Final Answer:

   Modules are not properly connected or data is missing between them -> Option A

4. Quick Check:

   Null pointer = missing data between modules [OK]

Hint: Null pointer in integration means missing connection/data [OK]

Common Mistakes:

• Assuming unit tests guarantee integration success
• Blaming system testing for integration errors
• Ignoring environment issues unrelated to null pointers

5. You have three modules: Auth, Profile, and Notifications. Auth sends user info to Profile, which then triggers Notifications. Which integration test scenario best checks the full flow?

hard

A. Test Auth alone for correct login

B. Test Profile updates without Auth

C. Test Auth sending data to Profile and Profile triggering Notifications

D. Test Notifications independently for message format

Solution

1. Step 1: Identify integration points

   The flow involves Auth sending data to Profile, then Profile triggering Notifications. Testing this chain checks integration.

2. Step 2: Choose scenario covering full module interaction

   Only Test Auth sending data to Profile and Profile triggering Notifications tests the full flow of data and triggers across all three modules together.

3. Final Answer:

   Test Auth sending data to Profile and Profile triggering Notifications -> Option C

4. Quick Check:

   Full flow test = Auth -> Profile -> Notifications [OK]

Hint: Test full chain of modules for integration [OK]

Common Mistakes:

• Testing modules in isolation only
• Skipping intermediate module triggers
• Ignoring data flow between modules