126 lines
3.4 KiB
Dart
126 lines
3.4 KiB
Dart
import 'package:drift/drift.dart' hide isNotNull, isNull;
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import 'package:drift_offline_first/drift_offline_first.dart';
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import 'package:test/test.dart';
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import '../utils/crdt_context.dart';
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import '../utils/database.dart';
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import '../utils/tables.dart';
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void main() {
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late OfflineSyncCrdt crdt;
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late CrdtDatabase crdtDb;
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late String nodeId;
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group('Given CRDT for an empty database and a pending changeset', () {
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late Iterable<CrdtDataEntry> changeset;
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setUp(() async {
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(crdt, crdtDb, nodeId) = database.crdtContext;
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final todo = TodoEntry(
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id: const RowId(1),
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content: 'test',
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targetDate: DateTime.now(),
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);
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changeset = todo.toCrdtDataEntry(nodeId);
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});
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test(
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'when merging a changeset '
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'then the changeset is saved to the database.', () async {
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await crdt.merge(changeset);
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expect(await crdtDb.managers.crdtDataTable.get(), changeset);
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});
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});
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group(
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'Given CRDT for a database with data and a pending changeset with conflicting data and older HLC',
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() {
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late Iterable<CrdtDataEntry> firstChangeset;
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late Iterable<CrdtDataEntry> lateOldChangeset;
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setUp(() async {
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(crdt, crdtDb, nodeId) = database.crdtContext;
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final todo = TodoEntry(
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id: const RowId(1),
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content: 'test',
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targetDate: DateTime.now(),
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);
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firstChangeset = todo.toCrdtDataEntry(nodeId);
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await crdt.merge(firstChangeset);
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lateOldChangeset = todo.toCrdtDataEntry(nodeId, hlc: Hlc.zero(nodeId));
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});
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test(
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'when merging a changeset with older HLC '
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'then no changes are saved to the database.', () async {
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await crdt.merge(lateOldChangeset);
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expect(await crdtDb.managers.crdtDataTable.get(), firstChangeset);
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});
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});
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group(
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'Given CRDT for a database with data and a pending changeset with conflicting data and some entries with newer HLC',
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() {
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late Iterable<CrdtDataEntry> firstChangeset;
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late Iterable<CrdtDataEntry> newerChangeset;
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setUp(() async {
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(crdt, crdtDb, nodeId) = database.crdtContext;
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final todo = TodoEntry(
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id: const RowId(1),
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content: 'test',
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targetDate: DateTime.now(),
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);
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firstChangeset = todo.toCrdtDataEntry(nodeId);
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await crdt.merge(firstChangeset);
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newerChangeset =
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todo.toCrdtDataEntry(nodeId).where((e) => e.columnName == 'content');
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});
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test(
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'when merging a changeset with some entries with newer HLC '
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'then the entries with newer HLC are saved to the database.', () async {
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await crdt.merge(newerChangeset);
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final expectedResultingChangeset = [
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for (final e in firstChangeset)
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if (e.columnName == 'content') newerChangeset.first else e,
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];
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expect(await crdtDb.managers.crdtDataTable.get(), expectedResultingChangeset);
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});
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});
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}
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extension on TodoEntry {
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Iterable<CrdtDataEntry> toCrdtDataEntry(String nodeId, {Hlc? hlc}) {
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final hlcTimestamp = hlc ?? Hlc.now(nodeId);
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return database.todosTable.$columns.map(
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(c) => CrdtDataEntry(
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userId: 'test',
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tblName: 'todos',
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columnName: c.$name,
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rowId: id.toString(),
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rawValue: (toJson()[c.$name] as Object?)?.toDriftAny(),
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hlcTimestamp: hlcTimestamp,
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),
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);
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}
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}
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extension on Object {
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DriftAny? toDriftAny() {
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return DriftAny(this);
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}
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}
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