Test utilities for Astrelis engine.

This crate provides testing infrastructure for the Astrelis game engine, including mock GPU contexts and render trait abstractions.

Overview

The main components are:

• RenderContext - Trait abstracting GPU operations
• MockRenderContext - Mock implementation for testing (requires mock feature)
• GPU wrapper types (GpuBuffer, GpuTexture, etc.) - Can be real or mock

Example

use astrelis_test_utils::{MockRenderContext, RenderContext};
use wgpu::*;

// Create a mock context for testing
let mock = MockRenderContext::new();

// Use it like a real GPU context
let buffer = mock.create_buffer(&BufferDescriptor {
    label: Some("test_buffer"),
    size: 1024,
    usage: BufferUsages::VERTEX,
    mapped_at_creation: false,
});

// Verify operations in tests
assert_eq!(mock.count_buffer_creates(), 1);
assert!(buffer.is_mock());

Design Philosophy

This crate follows several key design principles:

1. No Lifetimes

All GPU wrapper types are owned and use reference counting internally. This eliminates lifetime parameters from propagating through the codebase.

2. Interior Mutability

Mock implementations use Mutex for interior mutability, allowing &self methods to record calls.

3. Object Safety

The RenderContext trait is object-safe (dyn RenderContext), allowing for polymorphic usage with both real and mock contexts.