Rust CLI Troubleshooting: Tests, Doctests, and Documentation

cargo test

# Build and run the full test suite.

cargo test parse_args

# Filter tests by name substring.

cargo test -- --nocapture

# Print stdout/stderr from tests.

cargo test -- --test-threads=1

# Use one test thread to reduce races.

cargo test parse_args_handles_help -- --exact

# Use the exact test name through the test harness.

cargo test -p my-cli

# Limit the run to a selected member.

cargo doc

# Generate local docs for the package and dependencies.

cargo doc --open

# Generate documentation and launch it in a browser.

cargo test --doc

# Focus on failures in documentation examples.

cargo clean

# Remove target output before a fresh doc build.

/// ```
/// # use std::path::Path;
/// let path = Path::new("Cargo.toml");
/// assert!(path.exists());
/// ```

# Keep examples readable while still compiling.