dampen-cli 0.3.2

Developer CLI for Dampen UI framework
Documentation
//! Integration tests for production build code generation
//!
//! These tests verify that build.rs correctly generates static Rust code
//! from .dampen files.

use std::fs;
use std::path::PathBuf;

#[test]
fn test_build_rs_template_exists() {
    // Verify the build.rs template exists and is valid
    let template_path =
        PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("templates/build.rs.template");

    assert!(template_path.exists(), "build.rs template should exist");

    let content = fs::read_to_string(&template_path).expect("Should be able to read template");

    // Verify template has essential components
    assert!(
        content.contains("fn main()"),
        "Template should have main function"
    );
    assert!(content.contains("OUT_DIR"), "Template should use OUT_DIR");
    assert!(
        content.contains(".dampen"),
        "Template should reference .dampen files"
    );
}

#[test]
fn test_build_rs_finds_dampen_files() {
    // This test will verify that build.rs can find .dampen files
    // For now, this is a placeholder

    // TODO: Implement actual build.rs logic and test it
    assert!(true, "Placeholder - will implement with actual build.rs");
}

#[test]
fn test_build_rs_generates_code() {
    // This test will verify that build.rs generates valid Rust code
    // For now, this is a placeholder

    // Expected behavior:
    // 1. Parse .dampen files
    // 2. Generate ui_generated.rs with Message enum and Application impl
    // 3. Code should compile successfully

    // TODO: Implement actual code generation and test it
    assert!(true, "Placeholder - will implement with code generation");
}

#[test]
fn test_build_rs_validates_handlers() {
    // This test will verify that build.rs validates handler references
    // For now, this is a placeholder

    // Expected behavior:
    // 1. Detect handler references in XML
    // 2. Verify all referenced handlers exist
    // 3. Report helpful error messages for missing handlers

    // TODO: Implement handler validation and test it
    assert!(true, "Placeholder - will implement with validation");
}

#[test]
fn test_build_rs_detects_circular_dependencies() {
    // This test will verify that build.rs detects circular handler dependencies
    // For now, this is a placeholder

    // Expected behavior:
    // 1. Build handler call graph
    // 2. Detect cycles using DFS
    // 3. Report helpful error messages showing the cycle

    // TODO: Implement cycle detection and test it
    assert!(true, "Placeholder - will implement with cycle detection");
}

#[test]
fn test_build_rs_rerun_on_changes() {
    // Verify that build.rs properly declares rerun-if-changed
    let template_path =
        PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("templates/build.rs.template");

    let content = fs::read_to_string(&template_path).expect("Should be able to read template");

    // Should declare rerun triggers
    assert!(
        content.contains("cargo:rerun-if-changed"),
        "Template should declare rerun triggers"
    );
}