CPP Unit Testing & Code Quality 3

Question 1

When using Catch2, which keyword block defines a subsection within a test case that shares outer setup but has independent state?

Accepted Answer

SECTION

Answer

In Catch2, SECTION blocks re-run the enclosing TEST_CASE setup independently for each section, giving each its own clean state.

Question 2

What is a 'stub' in unit testing terminology?

Accepted Answer

A replacement for a dependency that returns canned responses without verifying calls

Answer

A stub replaces a real dependency and provides hardcoded return values to control the system under test's behavior, without asserting how it was called.

Question 3

In Google Mock, which macro sets an expectation that a method is called at least once?

Accepted Answer

EXPECT_CALL(...).Times(AtLeast(1))

Answer

EXPECT_CALL with .Times(AtLeast(1)) from the testing::AtLeast matcher asserts the mocked method is invoked one or more times.

Question 4

What does the cppcheck static analysis tool primarily report?

Accepted Answer

Bugs, undefined behavior, and dangerous coding patterns without requiring compilation

Answer

cppcheck performs static analysis on C++ source without compiling it, detecting bugs like null pointer dereferences, out-of-bounds access, and resource leaks.

Question 5

Which principle states that a unit test should test only one logical concept per test case?

Accepted Answer

Single Responsibility Principle for tests

Answer

Applying the Single Responsibility Principle to tests means each test case validates exactly one behavior, making failures immediately pinpoint the broken logic.

(CPP) C++ Programming Professional Certificate Practice Test

(CPP) C++ Programming Professional Certificate Practice Test

CPP Unit Testing & Code Quality 3