nexrad-render 1.0.0-rc.4

Rendering functions for NEXRAD weather radar data visualization.
Documentation 
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//! Tests for RenderOptions.

use nexrad_render::{Interpolation, RenderOptions};

#[test]
fn test_render_options_new() {
    let options = RenderOptions::new(800, 600);

    assert_eq!(options.size(), (800, 600));
    // Default background should be black (opaque)
    assert_eq!(options.background(), Some([0, 0, 0, 255]));
}

#[test]
fn test_render_options_transparent() {
    let options = RenderOptions::new(800, 600).transparent();

    assert_eq!(options.size(), (800, 600));
    assert_eq!(options.background(), None);
}

#[test]
fn test_render_options_with_background() {
    let options = RenderOptions::new(800, 600).with_background([255, 255, 255, 255]);

    assert_eq!(options.size(), (800, 600));
    assert_eq!(options.background(), Some([255, 255, 255, 255]));
}

#[test]
fn test_render_options_chain() {
    // Test that builder methods can be chained
    let options = RenderOptions::new(1000, 1000)
        .transparent()
        .with_background([128, 128, 128, 255]);

    assert_eq!(options.size(), (1000, 1000));
    // Last call wins
    assert_eq!(options.background(), Some([128, 128, 128, 255]));
}

#[test]
fn test_render_options_clone() {
    let options = RenderOptions::new(800, 600).transparent();
    let cloned = options.clone();

    assert_eq!(options.size(), cloned.size());
    assert_eq!(options.background(), cloned.background());
}

#[test]
fn test_render_options_debug() {
    let options = RenderOptions::new(800, 600);
    let debug_str = format!("{:?}", options);

    assert!(!debug_str.is_empty());
    assert!(debug_str.contains("RenderOptions"));
}

#[test]
fn test_render_options_default_is_nearest() {
    let options = RenderOptions::new(800, 600);
    assert_eq!(options.interpolation(), Interpolation::Nearest);
}

#[test]
fn test_render_options_bilinear() {
    let options = RenderOptions::new(800, 600).bilinear();
    assert_eq!(options.interpolation(), Interpolation::Bilinear);
}

#[test]
fn test_render_options_with_interpolation() {
    let options = RenderOptions::new(800, 600).with_interpolation(Interpolation::Bilinear);
    assert_eq!(options.interpolation(), Interpolation::Bilinear);

    let options = RenderOptions::new(800, 600).with_interpolation(Interpolation::Nearest);
    assert_eq!(options.interpolation(), Interpolation::Nearest);
}