add failing test for problem

This commit is contained in:
Bruno Windels 2020-03-21 13:57:41 +01:00
parent 0c51df220c
commit 4176af56ea

View File

@ -172,3 +172,67 @@ export default class TilesCollection extends BaseObservableList {
return this._tiles.length;
}
}
import ObservableArray from "../../../../observable/list/ObservableArray.js";
import UpdateAction from "./UpdateAction.js";
export function tests() {
class TestTile {
constructor(entry, update) {
this.entry = entry;
this.update = update;
}
tryIncludeEntry() {
return false;
}
compareEntry(b) {
return this.entry.n - b.n;
}
removeEntry() {
return true;
}
get upperEntry() {
return this.entry;
}
get lowerEntry() {
return this.entry;
}
updateNextSibling() {}
updatePreviousSibling() {}
updateEntry() {
return UpdateAction.Nothing;
}
}
return {
"don't emit update before add": assert => {
class UpdateOnSiblingTile extends TestTile {
updateNextSibling() {
// this happens with isContinuation
this.update(this, "next");
}
updatePreviousSibling() {
// this happens with isContinuation
this.update(this, "previous");
}
}
const entries = new ObservableArray([{n: 5}, {n: 10}]);
const tiles = new TilesCollection(entries, (e, u) => new UpdateOnSiblingTile(e, u));
let receivedAdd = false;
tiles.subscribe({
onAdd(idx, tile) {
assert(tile.entry.n, 7);
receivedAdd = true;
},
onUpdate(idx, tile) {
assert(tile.entry.n, 7);
assert(!receivedAdd, "receiving update before add");
}
});
entries.insert(1, {n: 7});
assert(receivedAdd);
},
}
}