PHP Quality Control & Assurance 5

Question 1

Which PHPUnit assertion should you use to verify a string contains a specific substring?

Accepted Answer

assertStringContainsString()

Answer

assertStringContainsString($needle, $haystack) is the correct PHPUnit 9+ assertion for substring checks.

Question 2

What is the purpose of the @covers annotation in PHPUnit?

Accepted Answer

Restrict coverage credit to only the specified class or method

Answer

@covers restricts which code is credited with coverage when a test runs, preventing false coverage from indirect calls.

Question 3

In Psalm (PHP static analyzer), what does the 'errorLevel' setting control?

Accepted Answer

How strictly Psalm reports type errors and issues

Answer

Psalm's errorLevel (1–8) determines which categories of issues are reported, with 1 being strictest.

Question 4

What is 'test isolation' and why is it important in PHP unit testing?

Accepted Answer

Ensuring each test does not depend on or affect other tests

Answer

Test isolation means each test sets up and tears down its own state so failures are independent and reproducible.

Question 5

Which HTTP status code range should an integration test typically assert for a successful PHP API response?

Accepted Answer

200–299

Answer

2xx status codes indicate success; integration tests assert these to confirm the API handled the request correctly.

PHP - PHP Programming Language Practice Test