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import { ItemSelection } from '$lib/Selection';
import { expect, test } from 'vitest';
interface TestItem {
id: number;
selectable: boolean;
}
const items: TestItem[] = [
{ id: 1, selectable: true },
{ id: 2, selectable: true },
{ id: 3, selectable: false },
{ id: 4, selectable: true }
];
const all = items.map((i) => i.id);
const selectable = items.filter((i) => i.selectable).map((i) => i.id);
const setup = () => {
const selection = new ItemSelection<TestItem>();
selection.view = items;
return selection;
};
test('selects a single item', () => {
let selection = setup();
selection = selection.update(0, false);
expect(selection.ids).toStrictEqual([items[0].id]);
});
test('selects a single item (with empty shift select)', () => {
let selection = setup();
selection = selection.update(0, true);
expect(selection.ids).toStrictEqual([items[0].id]);
});
test('selects multiple items (forwards)', () => {
let selection = setup();
selection = selection.update(0, false);
selection = selection.update(2, true);
expect(selection.ids.toSorted((a, b) => a - b)).toStrictEqual(all.slice(0, 3));
});
test('selects multiple items (backwards)', () => {
let selection = setup();
selection = selection.update(2, false);
selection = selection.update(0, true);
expect(selection.ids.toSorted((a, b) => a - b)).toStrictEqual(all.slice(0, 3));
});
test('selects multiple items (only selectables)', () => {
let selection = setup();
selection.selectable = (i) => i.selectable;
selection = selection.update(0, false);
selection = selection.update(3, true);
expect(selection.ids).toStrictEqual(selectable);
});
test('selects all', () => {
const selection = setup().all();
expect(selection.ids).toStrictEqual(all);
});
test('selects all selectables', () => {
let selection = setup();
selection.selectable = (i) => i.selectable;
selection = selection.all();
expect(selection.ids).toStrictEqual(selectable);
});
test('deselects all', () => {
let selection = setup().all();
selection = selection.none();
expect(selection.ids).empty;
});
test('deselects a single item', () => {
let selection = setup().all();
selection = selection.update(0, false);
expect(selection.ids).toStrictEqual(all.slice(1));
});
test('deselects multiple items', () => {
let selection = setup();
selection = selection.update(0, false);
selection = selection.update(2, true);
selection = selection.update(2, true);
expect(selection.ids).empty;
});
test('retains selection', () => {
let selection = setup();
selection = selection.all();
selection.view = items.slice(0, 2);
expect(selection.ids).toStrictEqual(all.slice(0, 2));
selection.view = items;
expect(selection.ids).toStrictEqual(all);
});
test('is inactive by default', () => {
const selection = setup();
expect(selection.active).toBe(false);
});
test('is inactive after clearing', () => {
let selection = setup();
selection.active = true;
selection = selection.clear();
expect(selection.active).false;
});
test('can be toggled', () => {
let selection = setup();
selection = selection.toggle();
expect(selection.active).toBe(true);
selection = selection.all();
selection = selection.toggle();
expect(selection.active).toBe(false);
expect(selection.ids).empty;
});
test('can be cleared', () => {
let selection = setup();
selection = selection.all();
selection = selection.clear();
expect(selection.ids).empty;
});
test('reports selected items', () => {
let selection = setup();
selection = selection.update(0, false);
selection = selection.update(2, false);
expect(selection.contains(all[0])).toBeTruthy();
expect(selection.contains(all[1])).toBeFalsy();
expect(selection.contains(all[2])).toBeTruthy();
expect(selection.contains(all[3])).toBeFalsy();
});
test('reports size', () => {
const selection = setup().all();
expect(selection.size).toBe(all.length);
});
test('reports size of visible items', () => {
const selection = setup().all();
selection.view = items.slice(0, 2);
expect(selection.size).toBe(2);
selection.view = items;
expect(selection.size).toBe(all.length);
});
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