cranpose-core 0.0.60

Core runtime for a Jetpack Compose inspired UI framework in Rust
Documentation 
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use super::*;

#[test]
fn record_node_reports_explicit_insert_and_reuse() {
    const GROUP_KEY: Key = 365;

    let mut harness = SlotHarness::new();

    harness.begin_pass(SlotPassMode::Compose);
    harness.session(|session| {
        begin_unkeyed(session, GROUP_KEY, None);
        let recorded = session.record_node_with_parent(11, 1, None);
        assert_eq!(
            recorded,
            NodeSlotUpdate::Inserted {
                id: 11,
                generation: 1,
            },
        );
        let result = session.finish_group_body();
        assert!(result.detached_children.is_empty());
        session.end_group();
    });
    harness.finish_pass();

    harness.begin_pass(SlotPassMode::Compose);
    harness.session(|session| {
        begin_unkeyed(session, GROUP_KEY, None);
        assert_eq!(session.current_node_record(), Some((11, 1)));
        let recorded = session.record_node_with_parent(11, 1, None);
        assert_eq!(
            recorded,
            NodeSlotUpdate::Reused {
                id: 11,
                generation: 1,
            },
        );
        let result = session.finish_group_body();
        assert!(result.detached_children.is_empty());
        session.end_group();
    });
    harness.finish_pass();

    assert_eq!(harness.table.group_node_record_at(0, 0).id, 11);
    assert_eq!(harness.table.group_node_record_at(0, 0).generation, 1);
}

#[test]
fn record_node_reports_explicit_id_replacement() {
    const GROUP_KEY: Key = 366;

    let mut harness = SlotHarness::new();

    harness.begin_pass(SlotPassMode::Compose);
    harness.session(|session| {
        begin_unkeyed(session, GROUP_KEY, None);
        let recorded = session.record_node_with_parent(11, 1, None);
        assert_eq!(
            recorded,
            NodeSlotUpdate::Inserted {
                id: 11,
                generation: 1,
            },
        );
        let result = session.finish_group_body();
        assert!(result.detached_children.is_empty());
        session.end_group();
    });
    harness.finish_pass();

    harness.begin_pass(SlotPassMode::Compose);
    harness.session(|session| {
        begin_unkeyed(session, GROUP_KEY, None);
        assert_eq!(session.current_node_record(), Some((11, 1)));
        let recorded = session.record_node_with_parent(12, 1, None);
        assert_eq!(
            recorded,
            NodeSlotUpdate::Replaced {
                old_id: 11,
                old_generation: 1,
                new_id: 12,
                new_generation: 1,
            },
            "replacing the node at the current cursor must report an explicit replacement",
        );
        let result = session.finish_group_body();
        assert!(result.detached_children.is_empty());
        session.end_group();
    });
    harness.finish_pass();

    assert_eq!(harness.table.group_node_record_at(0, 0).id, 12);
    assert_eq!(harness.table.group_node_record_at(0, 0).generation, 1);
}

#[test]
fn record_node_reports_explicit_generation_replacement() {
    const GROUP_KEY: Key = 367;

    let mut harness = SlotHarness::new();

    harness.begin_pass(SlotPassMode::Compose);
    harness.session(|session| {
        begin_unkeyed(session, GROUP_KEY, None);
        let recorded = session.record_node_with_parent(11, 1, None);
        assert_eq!(
            recorded,
            NodeSlotUpdate::Inserted {
                id: 11,
                generation: 1,
            },
        );
        let result = session.finish_group_body();
        assert!(result.detached_children.is_empty());
        session.end_group();
    });
    harness.finish_pass();

    harness.begin_pass(SlotPassMode::Compose);
    harness.session(|session| {
        begin_unkeyed(session, GROUP_KEY, None);
        assert_eq!(session.current_node_record(), Some((11, 1)));
        let recorded = session.record_node_with_parent(11, 2, None);
        assert_eq!(
            recorded,
            NodeSlotUpdate::Replaced {
                old_id: 11,
                old_generation: 1,
                new_id: 11,
                new_generation: 2,
            },
            "generation changes at the same node id must report explicit replacement",
        );
        let result = session.finish_group_body();
        assert!(result.detached_children.is_empty());
        session.end_group();
    });
    harness.finish_pass();

    assert_eq!(harness.table.group_node_record_at(0, 0).id, 11);
    assert_eq!(harness.table.group_node_record_at(0, 0).generation, 2);
}