versatiles_container 3.7.0

A toolbox for converting, checking and serving map tiles in various formats.
Documentation 
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//! Shared test utilities and fixtures for the versatiles_container crate.
//!
//! This module provides common test helpers that can be reused across test modules.
//! It is only compiled when running tests.

use versatiles_image::{DynamicImage, ImageBuffer};

/// Creates a tiny 2x2 RGB test image with known pixel values.
///
/// Pixel layout:
/// - (0,0): red (255, 0, 0)
/// - (1,0): green (0, 255, 0)
/// - (0,1): blue (0, 0, 255)
/// - (1,1): misc (10, 20, 30)
#[must_use]
pub fn tiny_rgb_image() -> DynamicImage {
	let data = vec![
		255, 0, 0, // red
		0, 255, 0, // green
		0, 0, 255, // blue
		10, 20, 30, // misc
	];
	DynamicImage::ImageRgb8(ImageBuffer::from_vec(2, 2, data).expect("vec->img"))
}

#[cfg(test)]
mod tests {
	use super::*;
	use versatiles_image::GenericImageView;

	#[test]
	fn tiny_rgb_image_has_expected_dimensions() {
		let img = tiny_rgb_image();
		assert_eq!(img.dimensions(), (2, 2));
	}

	#[test]
	fn tiny_rgb_image_has_expected_pixels() {
		let img = tiny_rgb_image();
		let p00 = img.get_pixel(0, 0);
		let p10 = img.get_pixel(1, 0);
		let p01 = img.get_pixel(0, 1);
		let p11 = img.get_pixel(1, 1);

		assert_eq!(p00.0[0..3], [255, 0, 0]); // red
		assert_eq!(p10.0[0..3], [0, 255, 0]); // green
		assert_eq!(p01.0[0..3], [0, 0, 255]); // blue
		assert_eq!(p11.0[0..3], [10, 20, 30]); // misc
	}
}