# Julia Testing Tools Guide

**Version:** 1.0.0
**Date:** 2024-04-14
**Purpose:** Equivalent tools to Rust's Clippy, Rustfmt, and Cargo Audit for Julia

## Julia Equivalent Tools

### 1. JuliaFormatter.jl (✅ Equivalent to rustfmt)

**Purpose:** Code formatting and style enforcement

**Installation:**
```julia
using Pkg
Pkg.add("JuliaFormatter")
```

**Usage:**
```julia
using JuliaFormatter
# Format a single file
format("src/myfile.jl")
# Format entire project
format(".")
# Check formatting without changing files
format("."; overwrite=false)
```

**CI Integration:**
```yaml
- name: Check Julia formatting
  run: julia --project=docs -e '
    using JuliaFormatter
    JuliaFormatter.format("."; verbose=true, overwrite=false)
  '
```

### 2. JET.jl (✅ Equivalent to clippy)

**Purpose:** Static analysis and linting

**Installation:**
```julia
using Pkg
Pkg.add("JET")
```

**Usage:**
```julia
using JET
# Analyze current package
report_package(".")
# Test package with JET
JET.test_package(path=".")
```

**CI Integration:**
```yaml
- name: Julia static analysis
  run: julia --project=docs -e '
    using JET
    JET.test_package(path=".")
  '
```

### 3. Aqua.jl (✅ Equivalent to cargo audit)

**Purpose:** Package security and quality assurance

**Installation:**
```julia
using Pkg
Pkg.add("Aqua")
```

**Usage:**
```julia
using Aqua
# Run all tests
Aqua.test_all(MyPackage)
# Test dependencies
Aqua.test_ambiguities(MyPackage)
Aqua.test_deps_compat(MyPackage)
Aqua.test_project_extras(MyPackage)
```

**CI Integration:**
```yaml
- name: Julia package audit
  run: julia --project=docs -e '
    using Aqua
    Aqua.test_all(deps=true)
  '
```

### 4. BenchmarkTools.jl (✅ Equivalent to cargo bench)

**Purpose:** Performance benchmarking

**Installation:**
```julia
using Pkg
Pkg.add("BenchmarkTools")
```

**Usage:**
```julia
using BenchmarkTools
# Simple benchmark
@benchmark my_function(args)
# Benchmark group
@benchmarkable my_function(args)
```

### 5. Coverage.jl (✅ Test coverage)

**Purpose:** Code coverage analysis

**Installation:**
```julia
using Pkg
Pkg.add("Coverage")
```

**Usage:**
```julia
using Coverage
# Generate coverage reports
process_folder(".")
# Generate LCOV report
LCOV.writefolder("coverage")
```

## Recommended Julia CI/CD Pipeline

```yaml
name: Julia CI
on: [push, pull_request]

jobs:
  format:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: julia-actions/setup-julia@v2
        with:
          version: '1.10'
      - name: Install JuliaFormatter
        run: julia --project=docs -e 'using Pkg; Pkg.add("JuliaFormatter")'
      - name: Check formatting
        run: julia --project=docs -e '
          using JuliaFormatter
          JuliaFormatter.format("."; verbose=true, overwrite=false)
        '
  
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: julia-actions/setup-julia@v2
        with:
          version: '1.10'
      - name: Install JET
        run: julia --project=docs -e 'using Pkg; Pkg.add("JET")'
      - name: Static analysis
        run: julia --project=docs -e '
          using JET
          JET.test_package(path=".")
        '
  
  security:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: julia-actions/setup-julia@v2
        with:
          version: '1.10'
      - name: Install Aqua
        run: julia --project=docs -e 'using Pkg; Pkg.add("Aqua")'
      - name: Package audit
        run: julia --project=docs -e '
          using Aqua
          Aqua.test_all(deps=true)
        '
  
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: julia-actions/setup-julia@v2
        with:
          version: '1.10'
      - name: Run tests
        run: julia --project=. -e 'using Pkg; Pkg.test()'
      - name: Coverage
        run: julia --project=docs -e '
          using Coverage
          using Pkg; Pkg.test(coverage=true)
        '
```

## Migration Guide

### From Rust to Julia

| Rust Concept | Julia Equivalent |
|--------------|------------------|
| `cargo fmt` | `JuliaFormatter.format(".")` |
| `cargo clippy` | `JET.test_package(".")` |
| `cargo audit` | `Aqua.test_all()` |
| `cargo test` | `Pkg.test()` |
| `cargo bench` | `BenchmarkTools.@benchmark` |
| `Cargo.toml` | `Project.toml` |
| `cargo doc` | `Documenter.jl` |

## Best Practices

1. **Project structure**: Use standard Julia package structure
2. **Dependency management**: Pin versions in `Project.toml`
3. **Testing**: Maintain >80% code coverage
4. **Documentation**: Use `Documenter.jl` for comprehensive docs
5. **CI/CD**: Use `julia-actions/setup-julia` GitHub action

## Resources

- [JuliaFormatter.jl Documentation](https://github.com/domluna/JuliaFormatter.jl)
- [JET.jl Documentation](https://github.com/aviatesk/JET.jl)
- [Aqua.jl Documentation](https://github.com/JuliaTesting/Aqua.jl)
- [Julia CI/CD Guide](https://julialang.github.io/Pkg.jl/v1/ci/)

**Maintainers:** @hyperpolymath/julia-team
**Last Updated:** 2024-04-14