Testing Frameworks in TuskLang with Rust

🧪 Testing Foundation

Testing frameworks with TuskLang and Rust provide comprehensive tools for building reliable applications. This guide covers unit testing, integration testing, property-based testing, and advanced testing strategies.

🏗️ Testing Architecture

Testing Stack

[testing_architecture]
unit_testing: true
integration_testing: true
property_testing: true
mocking: true
[testing_components]
tokio_test: "async_testing"
mockall: "mocking_framework"
proptest: "property_testing"
criterion: "benchmarking"

Testing Configuration

[testing_configuration]
enable_unit_tests: true
enable_integration_tests: true
enable_property_tests: true
enable_benchmarks: true
[testing_implementation]
use tokio_test;
use mockall::{automock, predicate::*};
use proptest::prelude::*;
use criterion::{black_box, criterion_group, criterion_main, Criterion};
// Test manager
pub struct TestManager {
    config: TestConfig,
    test_results: Arc<RwLock<Vec<TestResult>>>,
    coverage_data: Arc<RwLock<CoverageData>>,
}
#[derive(Debug, Clone)]
pub struct TestConfig {
    pub parallel_tests: bool,
    pub test_timeout: Duration,
    pub enable_coverage: bool,
    pub coverage_threshold: f64,
    pub enable_fuzzing: bool,
    pub fuzz_iterations: u32,
}
#[derive(Debug, Clone)]
pub struct TestResult {
    pub test_name: String,
    pub test_type: TestType,
    pub status: TestStatus,
    pub duration: Duration,
    pub error_message: Option<String>,
    pub coverage_percentage: Option<f64>,
}
#[derive(Debug, Clone)]
pub enum TestType {
    Unit,
    Integration,
    Property,
    Benchmark,
    Fuzz,
}
#[derive(Debug, Clone)]
pub enum TestStatus {
    Passed,
    Failed,
    Skipped,
    Timeout,
}
#[derive(Debug, Clone)]
pub struct CoverageData {
    pub total_lines: u64,
    pub covered_lines: u64,
    pub total_functions: u64,
    pub covered_functions: u64,
    pub total_branches: u64,
    pub covered_branches: u64,
}
impl TestManager {
    pub fn new(config: TestConfig) -> Self {
        Self {
            config,
            test_results: Arc::new(RwLock::new(Vec::new())),
            coverage_data: Arc::new(RwLock::new(CoverageData {
                total_lines: 0,
                covered_lines: 0,
                total_functions: 0,
                covered_functions: 0,
                total_branches: 0,
                covered_branches: 0,
            })),
        }
    }
    
    pub async fn run_all_tests(&self) -> TestSuiteResult {
        let start_time = Instant::now();
        let mut results = Vec::new();
        
        // Run unit tests
        results.extend(self.run_unit_tests().await);
        
        // Run integration tests
        results.extend(self.run_integration_tests().await);
        
        // Run property tests
        results.extend(self.run_property_tests().await);
        
        // Run benchmarks
        if self.config.enable_fuzzing {
            results.extend(self.run_fuzz_tests().await);
        }
        
        let total_duration = start_time.elapsed();
        let passed_tests = results.iter().filter(|r| matches!(r.status, TestStatus::Passed)).count();
        let failed_tests = results.iter().filter(|r| matches!(r.status, TestStatus::Failed)).count();
        
        // Store results
        {
            let mut test_results = self.test_results.write().await;
            test_results.extend(results.clone());
        }
        
        TestSuiteResult {
            total_tests: results.len(),
            passed_tests,
            failed_tests,
            total_duration,
            results,
        }
    }
    
    async fn run_unit_tests(&self) -> Vec<TestResult> {
        let mut results = Vec::new();
        
        // Example unit tests
        results.push(self.run_test("test_addition", TestType::Unit, || {
            assert_eq!(2 + 2, 4);
            Ok(())
        }).await);
        
        results.push(self.run_test("test_string_operations", TestType::Unit, || {
            let s = "hello".to_string();
            assert_eq!(s.len(), 5);
            assert_eq!(s.to_uppercase(), "HELLO");
            Ok(())
        }).await);
        
        results
    }
    
    async fn run_integration_tests(&self) -> Vec<TestResult> {
        let mut results = Vec::new();
        
        // Example integration tests
        results.push(self.run_test("test_database_connection", TestType::Integration, || {
            // Simulate database connection test
            tokio::time::sleep(Duration::from_millis(100)).await;
            Ok(())
        }).await);
        
        results.push(self.run_test("test_api_endpoint", TestType::Integration, || {
            // Simulate API endpoint test
            tokio::time::sleep(Duration::from_millis(200)).await;
            Ok(())
        }).await);
        
        results
    }
    
    async fn run_property_tests(&self) -> Vec<TestResult> {
        let mut results = Vec::new();
        
        // Example property tests
        results.push(self.run_property_test("test_addition_commutative", || {
            proptest!(|(a: i32, b: i32)| {
                assert_eq!(a + b, b + a);
            });
            Ok(())
        }).await);
        
        results.push(self.run_property_test("test_string_reverse", || {
            proptest!(|(s: String)| {
                let reversed = s.chars().rev().collect::<String>();
                let double_reversed = reversed.chars().rev().collect::<String>();
                assert_eq!(s, double_reversed);
            });
            Ok(())
        }).await);
        
        results
    }
    
    async fn run_fuzz_tests(&self) -> Vec<TestResult> {
        let mut results = Vec::new();
        
        // Example fuzz tests
        for i in 0..self.config.fuzz_iterations {
            results.push(self.run_test(&format!("fuzz_test_{}", i), TestType::Fuzz, || {
                let input = rand::random::<u64>();
                // Test with random input
                assert!(input >= 0);
                Ok(())
            }).await);
        }
        
        results
    }
    
    async fn run_test<F, Fut>(&self, name: &str, test_type: TestType, test_fn: F) -> TestResult
    where
        F: FnOnce() -> Fut,
        Fut: Future<Output = Result<(), String>>,
    {
        let start_time = Instant::now();
        
        let result = tokio::time::timeout(self.config.test_timeout, test_fn()).await;
        
        let duration = start_time.elapsed();
        let (status, error_message) = match result {
            Ok(Ok(())) => (TestStatus::Passed, None),
            Ok(Err(e)) => (TestStatus::Failed, Some(e)),
            Err(_) => (TestStatus::Timeout, Some("Test timed out".to_string())),
        };
        
        TestResult {
            test_name: name.to_string(),
            test_type,
            status,
            duration,
            error_message,
            coverage_percentage: None, // Would be calculated in real implementation
        }
    }
    
    async fn run_property_test<F>(&self, name: &str, test_fn: F) -> TestResult
    where
        F: FnOnce() -> Result<(), String>,
    {
        let start_time = Instant::now();
        
        let result = test_fn();
        
        let duration = start_time.elapsed();
        let (status, error_message) = match result {
            Ok(()) => (TestStatus::Passed, None),
            Err(e) => (TestStatus::Failed, Some(e)),
        };
        
        TestResult {
            test_name: name.to_string(),
            test_type: TestType::Property,
            status,
            duration,
            error_message,
            coverage_percentage: None,
        }
    }
    
    pub async fn get_test_results(&self) -> Vec<TestResult> {
        self.test_results.read().await.clone()
    }
    
    pub async fn get_coverage_data(&self) -> CoverageData {
        self.coverage_data.read().await.clone()
    }
}
#[derive(Debug)]
pub struct TestSuiteResult {
    pub total_tests: usize,
    pub passed_tests: usize,
    pub failed_tests: usize,
    pub total_duration: Duration,
    pub results: Vec<TestResult>,
}

🧪 Unit Testing

Advanced Unit Testing

[unit_testing]
test_organization: true
test_fixtures: true
test_utilities: true
[unit_implementation]
use std::sync::Arc;
// Test utilities
pub struct TestUtils;
impl TestUtils {
    pub fn assert_approx_eq(a: f64, b: f64, epsilon: f64) {
        assert!((a - b).abs() < epsilon, "{} and {} are not approximately equal", a, b);
    }
    
    pub fn assert_vec_eq<T: PartialEq + std::fmt::Debug>(a: &[T], b: &[T]) {
        assert_eq!(a.len(), b.len(), "Vector lengths differ");
        for (i, (a_val, b_val)) in a.iter().zip(b.iter()).enumerate() {
            assert_eq!(a_val, b_val, "Values at index {} differ: {:?} != {:?}", i, a_val, b_val);
        }
    }
    
    pub fn assert_result_ok<T, E: std::fmt::Debug>(result: Result<T, E>) -> T {
        match result {
            Ok(value) => value,
            Err(e) => panic!("Expected Ok, got Err: {:?}", e),
        }
    }
    
    pub fn assert_result_err<T: std::fmt::Debug, E: std::fmt::Debug>(result: Result<T, E>) -> E {
        match result {
            Ok(value) => panic!("Expected Err, got Ok: {:?}", value),
            Err(e) => e,
        }
    }
}
// Test fixtures
pub struct TestFixture {
    pub data: Vec<i32>,
    pub config: TestConfig,
}
impl TestFixture {
    pub fn new() -> Self {
        Self {
            data: vec![1, 2, 3, 4, 5],
            config: TestConfig {
                parallel_tests: false,
                test_timeout: Duration::from_secs(30),
                enable_coverage: false,
                coverage_threshold: 80.0,
                enable_fuzzing: false,
                fuzz_iterations: 1000,
            },
        }
    }
    
    pub fn with_data(mut self, data: Vec<i32>) -> Self {
        self.data = data;
        self
    }
    
    pub fn with_config(mut self, config: TestConfig) -> Self {
        self.config = config;
        self
    }
    
    pub fn setup(&mut self) {
        // Setup test environment
        println!("Setting up test fixture with {} items", self.data.len());
    }
    
    pub fn teardown(&mut self) {
        // Cleanup test environment
        println!("Tearing down test fixture");
    }
}
// Example functions to test
pub struct Calculator;
impl Calculator {
    pub fn add(a: i32, b: i32) -> i32 {
        a + b
    }
    
    pub fn subtract(a: i32, b: i32) -> i32 {
        a - b
    }
    
    pub fn multiply(a: i32, b: i32) -> i32 {
        a * b
    }
    
    pub fn divide(a: i32, b: i32) -> Result<i32, String> {
        if b == 0 {
            Err("Division by zero".to_string())
        } else {
            Ok(a / b)
        }
    }
    
    pub fn power(base: i32, exponent: u32) -> i32 {
        base.pow(exponent)
    }
}
// Unit tests
#[cfg(test)]
mod unit_tests {
    use super::*;
    
    #[test]
    fn test_calculator_add() {
        assert_eq!(Calculator::add(2, 3), 5);
        assert_eq!(Calculator::add(-1, 1), 0);
        assert_eq!(Calculator::add(0, 0), 0);
    }
    
    #[test]
    fn test_calculator_subtract() {
        assert_eq!(Calculator::subtract(5, 3), 2);
        assert_eq!(Calculator::subtract(1, 1), 0);
        assert_eq!(Calculator::subtract(0, 5), -5);
    }
    
    #[test]
    fn test_calculator_multiply() {
        assert_eq!(Calculator::multiply(2, 3), 6);
        assert_eq!(Calculator::multiply(-2, 3), -6);
        assert_eq!(Calculator::multiply(0, 5), 0);
    }
    
    #[test]
    fn test_calculator_divide() {
        assert_eq!(Calculator::divide(6, 2), Ok(3));
        assert_eq!(Calculator::divide(5, 2), Ok(2));
        assert_eq!(Calculator::divide(0, 5), Ok(0));
        
        // Test division by zero
        assert!(Calculator::divide(5, 0).is_err());
    }
    
    #[test]
    fn test_calculator_power() {
        assert_eq!(Calculator::power(2, 3), 8);
        assert_eq!(Calculator::power(5, 0), 1);
        assert_eq!(Calculator::power(0, 5), 0);
    }
    
    #[test]
    fn test_utils_assert_approx_eq() {
        TestUtils::assert_approx_eq(3.14159, 3.14159, 0.00001);
        TestUtils::assert_approx_eq(1.0, 1.0000001, 0.001);
    }
    
    #[test]
    fn test_utils_assert_vec_eq() {
        let a = vec![1, 2, 3];
        let b = vec![1, 2, 3];
        TestUtils::assert_vec_eq(&a, &b);
    }
    
    #[test]
    fn test_utils_assert_result_ok() {
        let result: Result<i32, String> = Ok(42);
        let value = TestUtils::assert_result_ok(result);
        assert_eq!(value, 42);
    }
    
    #[test]
    #[should_panic(expected = "Expected Ok, got Err")]
    fn test_utils_assert_result_ok_panics() {
        let result: Result<i32, String> = Err("error".to_string());
        TestUtils::assert_result_ok(result);
    }
    
    #[test]
    fn test_utils_assert_result_err() {
        let result: Result<i32, String> = Err("error".to_string());
        let error = TestUtils::assert_result_err(result);
        assert_eq!(error, "error");
    }
    
    #[test]
    #[should_panic(expected = "Expected Err, got Ok")]
    fn test_utils_assert_result_err_panics() {
        let result: Result<i32, String> = Ok(42);
        TestUtils::assert_result_err(result);
    }
}

🔗 Integration Testing

Advanced Integration Testing

[integration_testing]
test_services: true
test_databases: true
test_apis: true
[integration_implementation]
use tokio::net::TcpListener;
use hyper::{Body, Request, Response, Server};
use hyper::service::{make_service_fn, service_fn};
// Integration test utilities
pub struct IntegrationTestUtils;
impl IntegrationTestUtils {
    pub async fn start_test_server() -> String {
        let addr = ([127, 0, 0, 1], 0).into();
        let listener = TcpListener::bind(addr).await.unwrap();
        let addr = listener.local_addr().unwrap();
        
        let make_svc = make_service_fn(|_conn| async {
            Ok::<_, hyper::Error>(service_fn(|req: Request<Body>| async {
                let response = match req.uri().path() {
                    "/health" => Response::new(Body::from("OK")),
                    "/api/test" => Response::new(Body::from(r#"{"status":"success"}"#)),
                    _ => Response::builder()
                        .status(404)
                        .body(Body::from("Not Found"))
                        .unwrap(),
                };
                Ok::<_, hyper::Error>(response)
            }))
        });
        
        let server = Server::from_tcp(listener).unwrap().serve(make_svc);
        
        tokio::spawn(async move {
            server.await.unwrap();
        });
        
        format!("http://{}", addr)
    }
    
    pub async fn wait_for_server(url: &str) -> Result<(), Box<dyn std::error::Error>> {
        let client = reqwest::Client::new();
        let mut attempts = 0;
        let max_attempts = 10;
        
        while attempts < max_attempts {
            match client.get(&format!("{}/health", url)).send().await {
                Ok(response) => {
                    if response.status().is_success() {
                        return Ok(());
                    }
                }
                Err(_) => {}
            }
            
            tokio::time::sleep(Duration::from_millis(100)).await;
            attempts += 1;
        }
        
        Err("Server failed to start".into())
    }
    
    pub async fn cleanup_test_data() {
        // Cleanup test data
        println!("Cleaning up test data");
    }
}
// Mock database for integration tests
pub struct MockDatabase {
    data: Arc<RwLock<HashMap<String, String>>>,
}
impl MockDatabase {
    pub fn new() -> Self {
        Self {
            data: Arc::new(RwLock::new(HashMap::new())),
        }
    }
    
    pub async fn insert(&self, key: String, value: String) -> Result<(), String> {
        let mut data = self.data.write().await;
        data.insert(key, value);
        Ok(())
    }
    
    pub async fn get(&self, key: &str) -> Result<Option<String>, String> {
        let data = self.data.read().await;
        Ok(data.get(key).cloned())
    }
    
    pub async fn delete(&self, key: &str) -> Result<(), String> {
        let mut data = self.data.write().await;
        data.remove(key);
        Ok(())
    }
    
    pub async fn clear(&self) {
        let mut data = self.data.write().await;
        data.clear();
    }
}
// Integration tests
#[cfg(test)]
mod integration_tests {
    use super::*;
    
    #[tokio::test]
    async fn test_server_health_endpoint() {
        let server_url = IntegrationTestUtils::start_test_server().await;
        IntegrationTestUtils::wait_for_server(&server_url).await.unwrap();
        
        let client = reqwest::Client::new();
        let response = client.get(&format!("{}/health", server_url))
            .send()
            .await
            .unwrap();
        
        assert!(response.status().is_success());
        assert_eq!(response.text().await.unwrap(), "OK");
    }
    
    #[tokio::test]
    async fn test_api_endpoint() {
        let server_url = IntegrationTestUtils::start_test_server().await;
        IntegrationTestUtils::wait_for_server(&server_url).await.unwrap();
        
        let client = reqwest::Client::new();
        let response = client.get(&format!("{}/api/test", server_url))
            .send()
            .await
            .unwrap();
        
        assert!(response.status().is_success());
        let body: serde_json::Value = response.json().await.unwrap();
        assert_eq!(body["status"], "success");
    }
    
    #[tokio::test]
    async fn test_database_operations() {
        let db = MockDatabase::new();
        
        // Test insert
        db.insert("key1".to_string(), "value1".to_string()).await.unwrap();
        
        // Test get
        let value = db.get("key1").await.unwrap();
        assert_eq!(value, Some("value1".to_string()));
        
        // Test delete
        db.delete("key1").await.unwrap();
        let value = db.get("key1").await.unwrap();
        assert_eq!(value, None);
        
        // Cleanup
        db.clear().await;
    }
    
    #[tokio::test]
    async fn test_calculator_integration() {
        // Test calculator with database storage
        let db = MockDatabase::new();
        
        let result = Calculator::add(5, 3);
        db.insert("last_result".to_string(), result.to_string()).await.unwrap();
        
        let stored_result = db.get("last_result").await.unwrap();
        assert_eq!(stored_result, Some("8".to_string()));
        
        db.clear().await;
    }
}

🔍 Property-Based Testing

Advanced Property Testing

[property_testing]
proptest_framework: true
custom_strategies: true
shrinking: true
[property_implementation]
use proptest::prelude::*;
use proptest::test_runner::TestCaseError;
// Property test utilities
pub struct PropertyTestUtils;
impl PropertyTestUtils {
    pub fn test_addition_properties() {
        proptest!(|(a: i32, b: i32)| {
            // Commutative property
            assert_eq!(Calculator::add(a, b), Calculator::add(b, a));
            
            // Associative property
            let c = 42i32;
            assert_eq!(
                Calculator::add(Calculator::add(a, b), c),
                Calculator::add(a, Calculator::add(b, c))
            );
            
            // Identity property
            assert_eq!(Calculator::add(a, 0), a);
        });
    }
    
    pub fn test_multiplication_properties() {
        proptest!(|(a: i32, b: i32)| {
            // Commutative property
            assert_eq!(Calculator::multiply(a, b), Calculator::multiply(b, a));
            
            // Associative property
            let c = 42i32;
            assert_eq!(
                Calculator::multiply(Calculator::multiply(a, b), c),
                Calculator::multiply(a, Calculator::multiply(b, c))
            );
            
            // Identity property
            assert_eq!(Calculator::multiply(a, 1), a);
            
            // Zero property
            assert_eq!(Calculator::multiply(a, 0), 0);
        });
    }
    
    pub fn test_string_properties() {
        proptest!(|(s: String)| {
            // Reverse twice should be identity
            let reversed = s.chars().rev().collect::<String>();
            let double_reversed = reversed.chars().rev().collect::<String>();
            assert_eq!(s, double_reversed);
            
            // Length should be preserved
            assert_eq!(s.len(), reversed.len());
            
            // Empty string properties
            if s.is_empty() {
                assert_eq!(reversed, "");
            }
        });
    }
    
    pub fn test_vector_properties() {
        proptest!(|(v: Vec<i32>)| {
            // Reverse twice should be identity
            let mut reversed = v.clone();
            reversed.reverse();
            let mut double_reversed = reversed.clone();
            double_reversed.reverse();
            assert_eq!(v, double_reversed);
            
            // Length should be preserved
            assert_eq!(v.len(), reversed.len());
            
            // Sum should be preserved
            let original_sum: i32 = v.iter().sum();
            let reversed_sum: i32 = reversed.iter().sum();
            assert_eq!(original_sum, reversed_sum);
        });
    }
}
// Custom strategies
pub fn custom_string_strategy() -> impl Strategy<Value = String> {
    prop::collection::vec(prop::char::any(), 0..100)
        .prop_map(|chars| chars.into_iter().collect())
}
pub fn custom_number_strategy() -> impl Strategy<Value = i32> {
    prop::num::i32::ANY
        .prop_filter("Non-zero numbers", |&x| x != 0)
}
// Property tests
#[cfg(test)]
mod property_tests {
    use super::*;
    
    proptest! {
        #[test]
        fn test_addition_commutative(a: i32, b: i32) {
            assert_eq!(Calculator::add(a, b), Calculator::add(b, a));
        }
        
        #[test]
        fn test_addition_associative(a: i32, b: i32) {
            let c = 42i32;
            assert_eq!(
                Calculator::add(Calculator::add(a, b), c),
                Calculator::add(a, Calculator::add(b, c))
            );
        }
        
        #[test]
        fn test_multiplication_commutative(a: i32, b: i32) {
            assert_eq!(Calculator::multiply(a, b), Calculator::multiply(b, a));
        }
        
        #[test]
        fn test_multiplication_zero(a: i32) {
            assert_eq!(Calculator::multiply(a, 0), 0);
        }
        
        #[test]
        fn test_division_by_non_zero(a: i32, b in custom_number_strategy()) {
            let result = Calculator::divide(a, b);
            assert!(result.is_ok());
        }
        
        #[test]
        fn test_string_reverse_identity(s in custom_string_strategy()) {
            let reversed = s.chars().rev().collect::<String>();
            let double_reversed = reversed.chars().rev().collect::<String>();
            assert_eq!(s, double_reversed);
        }
        
        #[test]
        fn test_vector_reverse_identity(v: Vec<i32>) {
            let mut reversed = v.clone();
            reversed.reverse();
            let mut double_reversed = reversed.clone();
            double_reversed.reverse();
            assert_eq!(v, double_reversed);
        }
    }
}

🎯 Best Practices

1. Test Organization

- Organize tests by functionality and type - Use descriptive test names and clear assertions - Implement test fixtures for common setup - Use test utilities for common operations

2. Test Coverage

- Aim for high test coverage (80%+) - Test edge cases and error conditions - Use property-based testing for complex logic - Implement integration tests for critical paths

3. Test Performance

- Keep tests fast and independent - Use mocking for external dependencies - Implement parallel test execution - Use benchmarks for performance-critical code

4. Test Maintenance

- Keep tests up to date with code changes - Use test data factories for complex objects - Implement test utilities for common patterns - Document test requirements and assumptions

5. TuskLang Integration

- Use TuskLang configuration for test parameters - Implement test reporting with TuskLang - Configure test environments through TuskLang - Use TuskLang for test data management

Testing frameworks with TuskLang and Rust provide comprehensive tools for building reliable applications with robust testing strategies and coverage analysis.