dioxus/packages/core/tests/vdom_rebuild.rs

#![allow(unused, non_upper_case_globals)]

//! Rebuilding tests
//! ----------------
//!
//! This tests module ensures that the initial build of the virtualdom is correct.
//! This does not include dynamic tests or the diffing algorithm itself.
//!
//! It does prove that mounting works properly and the correct edit streams are generated.
//!
//! Don't have a good way to validate, everything is done manually ATM

use dioxus::prelude::*;
use dioxus::DomEdit;
use dioxus_core as dioxus;
use dioxus_core_macro::*;
use dioxus_html as dioxus_elements;
use DomEdit::*;

#[test]
fn app_runs() {
    static App: Component = |cx| rsx!(cx, div{"hello"} );

    let mut vdom = VirtualDom::new(App);
    let edits = vdom.rebuild();
}

#[test]
fn fragments_work() {
    static App: Component = |cx| {
        cx.render(rsx!(
            div{"hello"}
            div{"goodbye"}
        ))
    };
    let mut vdom = VirtualDom::new(App);
    let edits = vdom.rebuild();
    // should result in a final "appendchildren n=2"
    dbg!(edits);
}

#[test]
fn lists_work() {
    static App: Component = |cx| {
        cx.render(rsx!(
            h1 {"hello"}
            (0..6).map(|f| rsx!(span{ "{f}" }))
        ))
    };
    let mut vdom = VirtualDom::new(App);
    let edits = vdom.rebuild();
    dbg!(edits);
}

#[test]
fn conditional_rendering() {
    static App: Component = |cx| {
        cx.render(rsx!(
            h1 {"hello"}
            {true.then(|| rsx!(span{ "a" }))}
            {false.then(|| rsx!(span{ "b" }))}
        ))
    };
    let mut vdom = VirtualDom::new(App);

    let mutations = vdom.rebuild();
    assert_eq!(
        mutations.edits,
        [
            CreateElement { root: 1, tag: "h1" },
            CreateTextNode { root: 2, text: "hello" },
            AppendChildren { many: 1 },
            CreateElement { root: 3, tag: "span" },
            CreateTextNode { root: 4, text: "a" },
            AppendChildren { many: 1 },
            CreatePlaceholder { root: 5 },
            AppendChildren { many: 3 },
        ]
    )
}

#[test]
fn child_components() {
    static App: Component = |cx| {
        cx.render(rsx!(
            {true.then(|| rsx!(Child { }))}
            {false.then(|| rsx!(Child { }))}
        ))
    };
    static Child: Component = |cx| {
        cx.render(rsx!(
            h1 {"hello"}
            h1 {"goodbye"}
        ))
    };
    let mut vdom = VirtualDom::new(App);
    let edits = vdom.rebuild();
    dbg!(edits);
}