archlens/crates/adapters/tree-sitter/tests/rust_analyzer_tests.rs

use archlens_domain::{
    CodeElementKind, FilePath, Language, RelationshipKind, SourceFile, ports::SourceAnalyzer,
};
use archlens_tree_sitter::TreeSitterAnalyzer;

fn analyze_rust(source: &str, filename: &str) -> archlens_domain::AnalysisResult {
    let dir = tempfile::tempdir().unwrap();
    let file_path = dir.path().join(filename);
    std::fs::write(&file_path, source).unwrap();

    let analyzer = TreeSitterAnalyzer::new();
    let source_file = SourceFile::new(
        FilePath::new(file_path.to_str().unwrap()).unwrap(),
        Language::Rust,
    );
    analyzer.analyze_file(&source_file).unwrap()
}

#[test]
fn extracts_rust_struct() {
    let result = analyze_rust("pub struct Order {\n    id: u64,\n}", "order.rs");

    assert_eq!(result.elements().len(), 1);
    assert_eq!(result.elements()[0].name(), "Order");
    assert_eq!(result.elements()[0].kind(), CodeElementKind::Struct);
}

#[test]
fn extracts_rust_enum() {
    let result = analyze_rust(
        "pub enum Status {\n    Active,\n    Inactive,\n}",
        "status.rs",
    );

    assert_eq!(result.elements().len(), 1);
    assert_eq!(result.elements()[0].name(), "Status");
    assert_eq!(result.elements()[0].kind(), CodeElementKind::Enum);
}

#[test]
fn extracts_rust_trait() {
    let result = analyze_rust("pub trait Repository {\n    fn find(&self);\n}", "repo.rs");

    assert_eq!(result.elements().len(), 1);
    assert_eq!(result.elements()[0].name(), "Repository");
    assert_eq!(result.elements()[0].kind(), CodeElementKind::Trait);
}

#[test]
fn extracts_composition_from_struct_fields() {
    let source =
        "pub struct Order {\n    id: u64,\n}\npub struct OrderService {\n    order: Order,\n}";
    let result = analyze_rust(source, "service.rs");

    assert_eq!(result.elements().len(), 2);
    assert_eq!(result.relationships().len(), 1);
    assert_eq!(result.relationships()[0].source(), "OrderService");
    assert_eq!(result.relationships()[0].target(), "Order");
    assert_eq!(
        result.relationships()[0].kind(),
        RelationshipKind::Composition
    );
}

#[test]
fn extracts_inheritance_from_trait_impl() {
    let source = "pub trait Printable {}\npub struct Order {}\nimpl Printable for Order {}";
    let result = analyze_rust(source, "order.rs");

    let inheritance: Vec<_> = result
        .relationships()
        .iter()
        .filter(|r| r.kind() == RelationshipKind::Inheritance)
        .collect();

    assert_eq!(inheritance.len(), 1);
    assert_eq!(inheritance[0].source(), "Order");
    assert_eq!(inheritance[0].target(), "Printable");
}

#[test]
fn extracts_use_imports() {
    let source =
        "use crate::domain::Order;\nuse crate::ports::Repository;\n\npub struct Service {}";
    let result = analyze_rust(source, "service.rs");

    let imports: Vec<_> = result
        .relationships()
        .iter()
        .filter(|r| r.kind() == RelationshipKind::Import)
        .collect();

    assert!(imports.iter().any(|r| r.target() == "crate::domain::Order"));
    assert!(
        imports
            .iter()
            .any(|r| r.target() == "crate::ports::Repository")
    );
}

#[test]
fn filters_std_and_external_crate_imports() {
    let source =
        "use std::collections::HashMap;\nuse serde::Serialize;\nuse crate::models::Order;\n";
    let result = analyze_rust(source, "lib.rs");

    let imports: Vec<_> = result
        .relationships()
        .iter()
        .filter(|r| r.kind() == RelationshipKind::Import)
        .collect();

    assert_eq!(imports.len(), 1);
    assert_eq!(imports[0].target(), "crate::models::Order");
}

#[test]
fn extracts_mod_declarations() {
    let source = "mod models;\nmod services;\npub struct App {}";
    let result = analyze_rust(source, "lib.rs");

    let imports: Vec<_> = result
        .relationships()
        .iter()
        .filter(|r| r.kind() == RelationshipKind::Import)
        .collect();

    assert!(imports.iter().any(|r| r.target() == "crate::models"));
    assert!(imports.iter().any(|r| r.target() == "crate::services"));
}