nextest-rs/nextest

Features

• High Performance Task Execution - Executes tests using a high-performance execution model to maximize speed and reliability.
• Rust Test Process Isolation - Runs Rust test suites with high parallelism and strict process isolation to improve reliability.
• Test Execution Recording and Replay - Captures test execution data into archives to replay runs locally or analyze performance traces.
• Test Result Persistence - Stores execution results on disk to enable replaying runs or selectively rerunning tests.
• Test Execution Archives - Captures test execution metadata and outputs into archives for later replay and analysis.
• Test Concurrency Management - Controls the number of concurrent threads used for the test suite and individual tests to balance resources.
• CI Test Distribution - Distributes test loads across multiple workers and exports results in a standardized XML format.
• Process Isolation - Executes each test in a dedicated process to prevent global state interference and memory corruption.
• Test Execution Replays - Records execution data and replays previous runs to facilitate efficient failure analysis.
• Retry Policies - Reruns failed tests using fixed or exponential backoff strategies to handle intermittent failures.
• Flaky Task Retry Managers - Identifies unstable tests through stress loops and automated retry policies to ensure build quality.
• Resource Slot Scheduling - Assigns unique integer slot numbers to concurrent tests to prevent resource collisions, such as network port conflicts.
• System Call Tracing - Logs and filters low-level interactions between the test process and the operating system using a system call tracer.
• Event Stream Recording - Captures all test execution events and metadata into a serialized archive for later analysis or replay.
• Non-Deterministic Failure Detection - Identifies non-deterministic test failures through stress loops and automated retries.
• Test Isolation - Executes each test in a separate process to prevent shared state interference and isolate crashes.
• Flaky Test Analyzers - Identifies unstable tests by running them in stress loops to verify consistent behavior.
• Test Execution Timeouts - Enforces time limits on tests and benchmarks to terminate processes that exceed defined windows.
• Test Retry Strategies - Automatically reruns failed tests multiple times to identify and mark flaky test cases.
• Parallel Test Execution - Runs individual tests in separate processes to isolate failures and reduce total execution time.
• Concurrency Limiters - Restricts the number of simultaneous resource-intensive tests using weights to prevent system exhaustion.
• Parallelism Tuning - Sets the number of simultaneous tests using CPU counts or fixed integers to balance resource usage.
• Test-Level Debugging - Allows launching specific tests under a debugger or system call tracer to isolate and analyze failures.
• Test Suite Partitioning - Splits a test suite into multiple buckets using slicing or hashing to execute tests in parallel.
• Test Stress Loops - Identifies unstable tests by running them in repeated stress loops to detect intermittent failures.
• Test Selection Patterns - Identifies tests or packages using equality, substrings, regular expressions, or glob patterns.
• Rust Test Execution Engines - Provides a high-performance execution engine for Rust tests with process isolation.
• Test Discovery Mechanisms - Provides automated processes for identifying and queuing all discoverable tests within a workspace.
• Test Execution Filtering - Provides mechanisms to select specific tests for execution based on names, groups, packages, or target platforms.
• Complex Filter Composition - Combines selection criteria using intersection, union, and negation to isolate specific test sets.
• Test Execution Recording - Captures statuses, durations, and outputs into a cache for later analysis or failure reproduction.
• Test Selection DSLs - Uses a domain specific language with boolean logic and regex to select specific test subsets.
• Test Execution Management - Manages test parallelism, retries, timeouts, complex filtering, and resource slotting.
• Machine-Readable Test Results - Produces test execution data in JSON format to facilitate integration with analysis scripts.
• Target-Specific Build Settings - Adjusts configuration values based on the build target platform to optimize behavior across different operating systems.
• Test Performance Profiling - Analyzes test execution times to identify and flag slow tests that may indicate performance regressions.
• Test Dependency Analysis - Identifies sets of tests using predicates based on package names and dependency relationships.
• Platform-Aware - Applies conditional settings and overrides based on the host or target operating system and architecture.
• Test Execution Wrappers - Executes test binaries via wrapper scripts to support cross-compilation and specific target environments.
• Fail-Fast - Stops the test suite after a specific number of failures to provide immediate feedback.
• Platform-Based Execution Overrides - Overrides retries or timeouts based on the host or target platform using configuration expressions.
• Platform-Specific Config Overrides - Applies specific configuration values based on the operating system to ensure optimal behavior across environments.
• CI Test Orchestrators - Partitions test suites across multiple workers and exports results in standardized JUnit XML and JSON formats.
• Execution Profiles - Groups configuration options into named profiles for applying different settings in local versus CI environments.
• Test Run Replays - Reproduces results or analyzes failures by executing a specific set of tests from a prior run.
• Serial Output Streaming - Passes test output directly to the terminal in serial order to prevent interleaved text from concurrent tests.
• Undefined Behavior Detection - Runs tests through a specialized interpreter to detect illegal operations and memory errors.
• Execution Replay - Reproduces previously captured test executions to inspect results using different reporting options.
• Test Execution Prioritization - Assigns numeric weights to tests to determine their specific order of execution within the suite.
• Environment Setup Scripts - Executes custom scripts before tests based on platform requirements or filters to prepare the environment.
• Project Configuration - Sets project-wide rules for retries and timeouts in a shared configuration file for version-controlled consistency.
• Test Resource Slots - Assigns unique integer identifiers to concurrent tests to prevent collisions when using shared resources like ports.
• Execution Progress Tracking - Displays real-time test progress via progress bars and counters during execution.
• Execution Tracing - Provides probes for dynamic tracing to monitor test attempts and measure execution timing in real time.
• Test Configuration - Assigns specific behaviors, such as automatic retries or serial execution, to individual tests.
• Test Execution Overrides - Customizes timeouts, retries, and priority for specific tests based on name filters or platforms.
• Immediate Failure Termination - Halts the execution of new tests immediately after the first failure occurs.
• Flaky Test Metadata Reporting - Tags tests that required retries to pass and includes this flakiness status in execution reports.
• Flaky Test Outcome Policies - Determines if tests that eventually pass after an initial failure are recorded as successful or failed.
• Test Result Reporters - Generates test results in JUnit XML format for integration with external reporting tools.
• Test Coverage Collections - Collects execution data during test runs by integrating with coverage tools and reporting services.
• Execution Standardizations - Provides a shared configuration file to standardize rules for retries, timeouts, and test groups across the project.
• Test Grouping Utilities - Organizes tests into custom groups to manage shared resource usage and ensure mutual exclusion.
• Failed Test Rerunning - Tracks and executes only the specific test cases that failed in a previous run across iterations.
• Hanging Test Cancellations - Terminates unresponsive tests by sending system signals to the process to ensure reliable cleanup.
• Interpreter-Based Testing - Uses specialized interpreters to execute tests for the purpose of detecting memory errors and undefined behavior.
• Live Test Status Querying - Provides an interactive way to inspect process IDs, duration, and captured output of tests while they are running.
• Subprocess Leak Detection - Detects and marks tests as failures if they leave orphaned child processes after completion.
• Test and Benchmark Execution - Measures code execution speed by running benchmarks across multiple measurement harnesses.
• Test Execution Pipelines - Manages a lifecycle of setup scripts, test execution, and teardown with scoped environment variable injection.
• Test Process Leak Detection - Flags tests that fail to clean up child processes upon completion.
• Test Setup Scripts - Executes scripts to initialize databases, services, or fixtures before tests begin with specific scoping.
• Execution Prioritization - Allows assigning priority values to tests to ensure critical cases are executed first.
• Cross-Platform Test Execution - Enables running test suites across different operating systems and architectures using platform-specific overrides.
• टेस्टिंग फ्रेमवर्क्स - High-performance parallel test runner with advanced filtering.

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