fission-test 0.8.0

Headless and runtime testing helpers for Fission applications
Documentation 
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use anyhow::Result;
use fission_core::ui::{TextInput, Widget};
use fission_core::{InputEvent, LayoutPoint};
use fission_ir::Role;
use fission_test::{detect_ir_cycle, TestHarness};

#[derive(Debug, Default, Clone)]
struct GlobalState {
    _text: String,
    checked: bool,
}
impl fission_core::action::GlobalState for GlobalState {}

#[test]
fn text_input_focus_has_no_ir_cycles() -> Result<()> {
    #[derive(Clone)]
    struct Root;
    impl From<Root> for Widget {
        fn from(_component: Root) -> Self {
            let (_ctx, _view) = fission_core::build::current::<GlobalState>();
            TextInput {
                value: String::new(),
                placeholder: Some("type".into()),
                width: Some(200.0),
                height: Some(40.0),
                ..Default::default()
            }
            .into()
        }
    }
    let mut h = TestHarness::new(GlobalState::default()).with_root_widget(Root);
    h.pump()?;

    // Find TextInput semantics node rect center
    let ir = h.last_ir.as_ref().unwrap();
    let mut text_node = None;
    for (id, node) in &ir.nodes {
        if let fission_ir::Op::Semantics(s) = &node.op {
            if s.role == Role::TextInput {
                text_node = Some(*id);
                break;
            }
        }
    }
    let id = text_node.expect("TextInput semantics not found");
    let rect = h.last_snapshot.as_ref().unwrap().get_node_rect(id).unwrap();
    let center = LayoutPoint::new(
        rect.x() + rect.width() / 2.0,
        rect.y() + rect.height() / 2.0,
    );

    h.send_event(InputEvent::Pointer(
        fission_core::event::PointerEvent::Down {
            point: center,
            button: fission_core::event::PointerButton::Primary,
            modifiers: 0,
        },
    ))?;
    h.pump()?;

    let ir2 = h.last_ir.as_ref().unwrap();
    assert!(
        detect_ir_cycle(ir2).is_none(),
        "IR contains cycle after focusing TextInput"
    );
    Ok(())
}

#[test]
fn checkbox_toggle_has_no_ir_cycles() -> Result<()> {
    use fission_core::Widget;
    use fission_widgets::Checkbox;

    use fission_core::event::{PointerButton, PointerEvent};

    #[fission_macros::fission_reducer(Toggle)]
    fn on_toggle(state: &mut GlobalState) {
        state.checked = !state.checked;
    }

    #[derive(Clone)]
    struct Root;
    impl From<Root> for Widget {
        fn from(_component: Root) -> Self {
            let (ctx, view) = fission_core::build::current::<GlobalState>();
            Checkbox {
                checked: view.state().checked,
                on_toggle: Some(fission_core::with_reducer!(ctx, Toggle, on_toggle)),
                label: Some("check".into()),
                ..Default::default()
            }
            .into()
        }
    }
    let mut h = TestHarness::new(GlobalState::default()).with_root_widget(Root);
    h.pump()?;

    // Locate checkbox semantics and click it (down + up)
    let ir = h.last_ir.as_ref().unwrap();
    let mut cb_node = None;
    for (id, node) in &ir.nodes {
        if let fission_ir::Op::Semantics(s) = &node.op {
            if s.role == Role::Checkbox {
                cb_node = Some(*id);
                break;
            }
        }
    }
    let id = cb_node.expect("Checkbox semantics not found");
    let rect = h.last_snapshot.as_ref().unwrap().get_node_rect(id).unwrap();
    let center = LayoutPoint::new(
        rect.x() + rect.width() / 2.0,
        rect.y() + rect.height() / 2.0,
    );

    h.send_event(fission_core::InputEvent::Pointer(PointerEvent::Down {
        point: center,
        button: PointerButton::Primary,
        modifiers: 0,
    }))?;
    h.pump()?;
    h.send_event(fission_core::InputEvent::Pointer(PointerEvent::Up {
        point: center,
        button: PointerButton::Primary,
        modifiers: 0,
    }))?;
    h.pump()?;

    let ir2 = h.last_ir.as_ref().unwrap();
    if let Some(cycle) = fission_test::detect_ir_cycle(ir2) {
        panic!("IR cycle after checkbox toggle: {:?}", cycle);
    }
    Ok(())
}