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Rust Testing Quiz

Rust
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Master comprehensive testing strategies in Rust including unit tests, integration tests, documentation tests, and testing best practices

40 Questions
~80 minutes
1

Question 1

What is the basic structure of a Rust test?

A
#[test] fn test_name() { assert_eq!(expected, actual); }
B
test fn test_name() { ... }
C
fn test_name() #[test] { ... }
D
No specific structure
2

Question 2

Where should unit tests be placed?

A
In the same file as the code being tested, in a tests module
B
In separate test files
C
Anywhere in the codebase
D
Only in main.rs
3

Question 3

What does assert_eq!(a, b) do?

A
Panics if a != b, shows both values in error
B
Returns boolean
C
Prints values
D
assert_eq doesn't exist
4

Question 4

What is the difference between assert! and assert_eq!?

A
assert! takes one boolean, assert_eq! compares two values with better error messages
B
They are identical
C
assert_eq! is deprecated
D
No difference
5

Question 5

What does #[should_panic] do?

A
Test passes if function panics, useful for testing error conditions
B
Makes test panic
C
Ignores panics
D
should_panic doesn't exist
6

Question 6

What is integration testing in Rust?

A
Tests in tests/ directory that test public API as external users would
B
Tests inside lib.rs
C
Unit tests
D
No integration tests
7

Question 7

What are documentation tests?

A
Code examples in /// comments that are automatically tested
B
Tests in documentation
C
Manual documentation
D
Documentation tests don't exist
8

Question 8

How do you hide code from documentation tests?

A
Use # before lines to hide them from test execution
B
Use // to hide
C
Cannot hide code
D
Use #[doc(hidden)]
9

Question 9

What is the Result<(), Box<dyn Error>> pattern in tests?

A
Allows using ? operator in tests for cleaner error handling
B
Makes tests return results
C
Required for all tests
D
Not used in tests
10

Question 10

What does #[ignore] do?

A
Skips test unless run with --ignored flag
B
Deletes test
C
Makes test faster
D
ignore doesn't exist
11

Question 11

What is test organization best practice?

A
Arrange, Act, Assert pattern with descriptive test names
B
Random organization
C
No organization needed
D
Only one test per file
12

Question 12

What is a test fixture?

A
Setup code that runs before each test, like creating test data
B
Test framework
C
Test result
D
Test fixtures don't exist
13

Question 13

How do you test private functions?

A
Test through public interface, or make functions pub(crate) for testing
B
Cannot test private functions
C
Make all functions public
D
Use reflection
14

Question 14

What is mocking in Rust tests?

A
Replacing dependencies with test doubles using traits or conditional compilation
B
Making fun of code
C
Not possible in Rust
D
Built-in mocking
15

Question 15

What is property-based testing?

A
Testing with randomly generated inputs to find edge cases
B
Testing properties
C
Manual testing
D
Property-based testing doesn't exist
16

Question 16

What is fuzz testing?

A
Automated testing with malformed inputs to find crashes
B
Testing with random data
C
Performance testing
D
Fuzz testing doesn't exist
17

Question 17

What does cargo test --release do?

A
Runs tests with release optimizations, faster but may miss some debug checks
B
Makes tests release quality
C
Ignores tests
D
No such flag
18

Question 18

What is test-driven development (TDD)?

A
Writing tests first, then implementing code to pass tests
B
Testing after development
C
No testing
D
TDD doesn't exist
19

Question 19

What is code coverage?

A
Percentage of code lines executed during tests
B
Code quality metric
C
Test count
D
Code coverage doesn't exist
20

Question 20

What is continuous integration (CI) testing?

A
Automated testing on every code change in shared repository
B
Manual testing
C
One-time testing
D
CI doesn't exist
21

Question 21

What is benchmarking in Rust?

A
Measuring code performance using criterion or #[bench]
B
Testing correctness
C
Code coverage
D
Benchmarking doesn't exist
22

Question 22

What is the difference between black-box and white-box testing?

A
Black-box tests public interface without knowing internals, white-box uses internal knowledge
B
They are identical
C
Black-box is better
D
No difference
23

Question 23

What is test isolation?

A
Tests don't depend on each other or shared state
B
Tests run alone
C
Tests are isolated
D
Test isolation doesn't exist
24

Question 24

What is a flaky test?

A
Test that sometimes passes, sometimes fails due to race conditions or external dependencies
B
Fast test
C
Broken test
D
Flaky tests don't exist
25

Question 25

What is test double?

A
Generic term for mocks, stubs, fakes, spies used in testing
B
Two tests
C
Test framework
D
Test doubles don't exist
26

Question 26

What is a stub?

A
Test double that returns predetermined responses
B
Broken test
C
Test framework
D
Stubs don't exist
27

Question 27

What is a mock?

A
Test double that verifies interactions and can return different responses
B
Makes fun of code
C
Test framework
D
Mocks don't exist
28

Question 28

What is snapshot testing?

A
Comparing output against previously saved 'snapshots'
B
Taking screenshots
C
Performance testing
D
Snapshot testing doesn't exist
29

Question 29

What is contract testing?

A
Testing that APIs meet their contracts between services
B
Legal testing
C
API testing
D
Contract testing doesn't exist
30

Question 30

What is mutation testing?

A
Modifying code slightly to see if tests catch the changes
B
Changing tests
C
Performance testing
D
Mutation testing doesn't exist
31

Question 31

What is the testing pyramid?

A
Many unit tests, fewer integration tests, few end-to-end tests
B
Equal number of all test types
C
Only end-to-end tests
D
Testing pyramid doesn't exist
32

Question 32

What is end-to-end testing?

A
Testing complete user workflows through UI or API
B
Testing individual functions
C
Unit testing
D
End-to-end testing doesn't exist
33

Question 33

What is acceptance testing?

A
Testing that software meets business requirements
B
Code testing
C
Performance testing
D
Acceptance testing doesn't exist
34

Question 34

What is regression testing?

A
Re-running tests to ensure new changes don't break existing functionality
B
Testing regressions
C
Performance testing
D
Regression testing doesn't exist
35

Question 35

What is exploratory testing?

A
Manual testing without predefined script, discovering issues through exploration
B
Automated testing
C
Unit testing
D
Exploratory testing doesn't exist
36

Question 36

What is the main function in integration tests?

A
Each test file can have its own main function for setup
B
No main function needed
C
Must use lib.rs main
D
Main function not allowed
37

Question 37

What is doctest?

A
Running code examples from documentation as tests
B
Testing documentation
C
Manual testing
D
Doctest doesn't exist
38

Question 38

What is test parallelism in Rust?

A
Tests run in parallel by default for speed
B
Tests run sequentially
C
No parallelism
D
Parallelism doesn't exist
39

Question 39

What is test output capture?

A
By default, passing tests capture output, failing tests show it
B
All output is shown
C
No output capture
D
Output capture doesn't exist
40

Question 40

In a complex Rust project with multiple crates, async code, external dependencies, and performance requirements, what testing strategy would you implement?

A
Unit tests for pure functions, integration tests for APIs, async tests with tokio::test, mocks for external deps, benchmarks for performance
B
Only unit tests
C
Only integration tests
D
No testing strategy needed

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QUIZZES IN Rust

1

Cargo and Project Setup

80

40 comprehensive questions on Rust's package manager Cargo, covering project initialization, building, running, project structure, and dependency management — with 15 code examples demonstrating practical Cargo usage.

2

Variables and Mutability

40

40 comprehensive questions on Rust's variable system, covering let bindings, mut keyword, shadowing, type inference, and constants — with 12 code examples demonstrating practical variable usage patterns.

3

Data Types

45

45 comprehensive questions on Rust's type system, covering scalar types, compound types, type conversions, numeric operations, and string types — with 15 code examples demonstrating practical type usage patterns.

4

Control Flow

45

45 comprehensive questions on Rust's control flow constructs, covering if expressions, loops, and control flow keywords — with 15 code examples demonstrating practical control flow usage.

5

Functions

40

40 questions covering function parameters, return values, expressions, diverging functions, and function scope in Rust.

6

Ownership

45

45 in-depth questions covering Rust's ownership system, move semantics, copy types, resource cleanup through Drop trait, precise drop timing, and ownership transfer patterns — with 12 code examples to solidify understanding.

7

Borrowing

45

45 in-depth questions covering Rust's borrowing system, immutable and mutable references, aliasing rules, reference scopes, and borrow checker validation — with 13 code examples to solidify understanding.

8

Lifetimes

40

40 in-depth questions covering Rust's lifetime system, lifetime annotations, elision rules, function signatures with lifetimes, struct references, and common lifetime errors — with 11 code examples to solidify understanding.

9

Strings

40

40 comprehensive questions on Rust's string types, covering String vs &str, UTF-8 behavior, slicing, mutating strings, and conversions — with 11 code examples demonstrating practical string handling patterns.

10

Collections

40

40 comprehensive questions on Rust's collection types, covering Vec, HashMap, VecDeque, iteration patterns, and capacity management — with 11 code examples demonstrating practical collection usage.

11

Slices

40

40 comprehensive questions on Rust's slice types, covering borrowed views, indexing, mutable slices, ranges, and slice methods — with 11 code examples demonstrating practical slice usage patterns.

12

Pattern Matching

40

40 comprehensive questions on Rust's pattern matching system, covering match expressions, destructuring, guards, wildcards, and enum matching — with 11 code examples demonstrating practical pattern matching techniques.

13

Enums

40

40 comprehensive questions on Rust's enum system, covering simple variants, data-carrying variants, enum matching, methods on enums, and Option/Result patterns — with 11 code examples demonstrating practical enum usage.

14

Struct

40

40 comprehensive questions on Rust's struct system, covering named fields, tuple structs, methods, associated functions, and field ownership — with 11 code examples demonstrating practical struct usage.

15

Modules

40

40 comprehensive questions on Rust's module system, covering module creation, visibility, imports, paths, and the use keyword — with 11 code examples demonstrating practical module organization patterns.

16

Traits

40

40 comprehensive questions on Rust's trait system, covering trait definitions, implementations, bounds, associated types, and trait objects — with 11 code examples demonstrating practical trait usage patterns.

17

Generic

40

40 comprehensive questions on Rust's generic programming system, covering generic functions, structs, enums, impl blocks, and monomorphization — with 11 code examples demonstrating practical generic usage patterns.

18

Iterators

40

Master Rust's powerful iterator system for efficient data processing and transformation

19

Closures

40

Master Rust's closure system for capturing environment variables and creating flexible function-like constructs

20

Error Handling

40

Master Rust's robust error handling system with Result, Option, and the ? operator for reliable code

21

File and I/O Operations

40

Master Rust's file system operations and I/O handling for robust data persistence and streaming

22

Smart Pointers

40

Master Rust's smart pointer types for automatic memory management and safe heap allocation

23

Concurrency

40

Master Rust's concurrency model with threads, channels, and synchronization primitives for safe parallel programming

24

Async Programming

40

Master asynchronous programming in Rust with futures, async/await, and concurrent execution patterns

25

Memory Management

40

Deep dive into Rust's ownership system, borrowing rules, and advanced memory management patterns for safe and efficient code

26

Macros

40

Master Rust's metaprogramming system with declarative and procedural macros for code generation and compile-time programming

27

Attributes

40

Master Rust's attribute system for conditional compilation, testing, documentation, and code generation

28

Testing

40

Master comprehensive testing strategies in Rust including unit tests, integration tests, documentation tests, and testing best practices

29

Crate Architecture

40

Master the design and organization of Rust crates including module systems, workspace management, dependency handling, and publishing strategies

30

Performance and Optimization

40

Master advanced performance techniques in Rust including profiling, benchmarking, memory optimization, and compiler optimizations