I’m following a tutorial for a messaging app using flutter & it’s connecting to rethinkdb. I’m trying to follow along with the latest packages and versions. I’m on a section where the author is using mockito for testing. I’m getting an error. I’m a beginner so the error is likely to be something very simple that I’m missing.
Here is the code snippet that is giving me an error:
test('should perform database update on messages', () async {
//arrange
final localMessage = LocalMessage('1234', message, ReceiptStatus.sent);
when(database.update('messages', localMessage.toMap(),
where: anyNamed('where'), whereArgs: anyNamed('whereArgs')))
.thenAnswer((_) async => 1);
//act
await sut.updateMessage(localMessage);
//assert
verify(database.update('messages', localMessage.toMap(),
where: anyNamed('where'),
whereArgs: anyNamed('whereArgs'),
conflictAlgorithm: ConflictAlgorithm.replace))
.called(1);
});
The error:
MissingStubError: 'update'
No stub was found which matches the arguments of this method call:
update('messages', {chat_id: 1234, id: 4444, from: 111, to: 222, timestamp: 2021-04-01 00:00:00.000, contents: hey, receipt: sent}, {where: id = ?, whereArgs: [4444], conflictAlgorithm: ConflictAlgorithm.replace})
Add a stub for this method using Mockito's 'when' API, or generate the MockDatabase mock with a MockSpec with 'returnNullOnMissingStub: true' (see https://pub.dev/documentation/mockito/latest/annotations/MockSpec-class.html).
I’m confused by the last sentence, because it looks like there already is a ‘when’ being used. I want to try ‘returnNullOnMissingStub: true’, but what is the best place to add that in my code, and is it the right solution or is something else better?
I’m also confused because in the rest of the test file, I successfully use database.insert and database.query, so it seems strange to me that database.update wouldn’t be working?
Here is the whole test file:
import 'package:chat/chat.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/annotations.dart';
import 'package:mockito/mockito.dart';
import 'package:rethink_chat/data/datasources/sqflite_datasource.dart';
import 'package:rethink_chat/models/chat.dart';
import 'package:rethink_chat/models/local_message.dart';
import 'package:sqflite/sqlite_api.dart';
import 'sqflite_datasource_test.mocks.dart';
//class MockSqfliteDatabase extends Mock implements Database {}
@GenerateMocks([Database])
//class MockBatch extends Mock implements Batch {}
@GenerateMocks([Batch])
void main() {
late SqfliteDatasource sut;
late MockDatabase database; // late MockSqfliteDatabase database;
late MockBatch batch;
setUp(() {
database = MockDatabase(); // database = MockSqfliteDatabase();
batch = MockBatch();
sut = SqfliteDatasource(database);
});
final message = Message.fromJson({
'from': '111',
'to': '222',
'contents': 'hey',
'timestamp': DateTime.parse("2021-04-01"),
'id': '4444',
});
test('should perform insert of chat to the database', () async {
//arrange
final chat = Chat('1234');
when(database.insert('chats', chat.toMap(),
conflictAlgorithm: ConflictAlgorithm.replace))
.thenAnswer((_) async => 1);
//act
await sut.addChat(chat);
//assert
verify(database.insert('chats', chat.toMap(),
conflictAlgorithm: ConflictAlgorithm.replace))
.called(1);
});
test('should perform insert of message to the database', () async {
//arrange
final localMessage = LocalMessage('1234', message, ReceiptStatus.sent);
when(database.insert('messages', localMessage.toMap(),
conflictAlgorithm: ConflictAlgorithm.replace))
.thenAnswer((_) async => 1);
//act
await sut.addMessage(localMessage);
//assert
verify(database.insert('messages', localMessage.toMap(),
conflictAlgorithm: ConflictAlgorithm.replace))
.called(1);
});
test('should perform a database query and return message', () async {
//arrange
final messagesMap = [
{
'chat_id': '111',
'id': '4444',
'from': '111',
'to': '222',
'contents': 'hey',
'receipt': 'sent',
'timestamp': DateTime.parse("2021-04-01"),
}
];
when(database.query(
'messages',
where: anyNamed('where'),
whereArgs: anyNamed('whereArgs'),
)).thenAnswer((_) async => messagesMap);
//act
var messages = await sut.findMessages('111');
//assert
expect(messages.length, 1);
expect(messages.first.chatId, '111');
verify(database.query(
'messages',
where: anyNamed('where'),
whereArgs: anyNamed('whereArgs'),
)).called(1);
});
test('should perform database update on messages', () async {
//arrange
final localMessage = LocalMessage('1234', message, ReceiptStatus.sent);
when(database.update('messages', localMessage.toMap(),
where: anyNamed('where'), whereArgs: anyNamed('whereArgs')))
.thenAnswer((_) async => 1);
//act
await sut.updateMessage(localMessage);
//assert
verify(database.update('messages', localMessage.toMap(),
where: anyNamed('where'),
whereArgs: anyNamed('whereArgs'),
conflictAlgorithm: ConflictAlgorithm.replace))
.called(1);
});
}
In sqflite_datasource_test.mocks.dart, I can see that there is a code for update so once again, I’m not sure why it isn’t working.
// Mocks generated by Mockito 5.2.0 from annotations
// in rethink_chat/test/data/sqflite_datasource_test.dart.
// Do not manually edit this file.
import 'dart:async' as _i3;
import 'package:mockito/mockito.dart' as _i1;
import 'package:sqflite_common/sql.dart' as _i4;
import 'package:sqflite_common/sqlite_api.dart' as _i2;
// ignore_for_file: type=lint
// ignore_for_file: avoid_redundant_argument_values
// ignore_for_file: avoid_setters_without_getters
// ignore_for_file: comment_references
// ignore_for_file: implementation_imports
// ignore_for_file: invalid_use_of_visible_for_testing_member
// ignore_for_file: prefer_const_constructors
// ignore_for_file: unnecessary_parenthesis
// ignore_for_file: camel_case_types
class _FakeBatch_0 extends _i1.Fake implements _i2.Batch {}
/// A class which mocks [Database].
///
/// See the documentation for Mockito's code generation for more information.
class MockDatabase extends _i1.Mock implements _i2.Database {
MockDatabase() {
_i1.throwOnMissingStub(this);
}
@override
String get path =>
(super.noSuchMethod(Invocation.getter(#path), returnValue: '') as String);
@override
bool get isOpen =>
(super.noSuchMethod(Invocation.getter(#isOpen), returnValue: false)
as bool);
@override
_i3.Future<void> close() => (super.noSuchMethod(Invocation.method(#close, []),
returnValue: Future<void>.value(),
returnValueForMissingStub: Future<void>.value()) as _i3.Future<void>);
@override
_i3.Future<T> transaction<T>(_i3.Future<T> Function(_i2.Transaction)? action,
{bool? exclusive}) =>
(super.noSuchMethod(
Invocation.method(#transaction, [action], {#exclusive: exclusive}),
returnValue: Future<T>.value(null)) as _i3.Future<T>);
@override
_i3.Future<int> getVersion() =>
(super.noSuchMethod(Invocation.method(#getVersion, []),
returnValue: Future<int>.value(0)) as _i3.Future<int>);
@override
_i3.Future<void> setVersion(int? version) =>
(super.noSuchMethod(Invocation.method(#setVersion, [version]),
returnValue: Future<void>.value(),
returnValueForMissingStub: Future<void>.value()) as _i3.Future<void>);
@override
_i3.Future<T> devInvokeMethod<T>(String? method, [dynamic arguments]) =>
(super.noSuchMethod(
Invocation.method(#devInvokeMethod, [method, arguments]),
returnValue: Future<T>.value(null)) as _i3.Future<T>);
@override
_i3.Future<T> devInvokeSqlMethod<T>(String? method, String? sql,
[List<Object?>? arguments]) =>
(super.noSuchMethod(
Invocation.method(#devInvokeSqlMethod, [method, sql, arguments]),
returnValue: Future<T>.value(null)) as _i3.Future<T>);
@override
_i3.Future<void> execute(String? sql, [List<Object?>? arguments]) =>
(super.noSuchMethod(Invocation.method(#execute, [sql, arguments]),
returnValue: Future<void>.value(),
returnValueForMissingStub: Future<void>.value()) as _i3.Future<void>);
@override
_i3.Future<int> rawInsert(String? sql, [List<Object?>? arguments]) =>
(super.noSuchMethod(Invocation.method(#rawInsert, [sql, arguments]),
returnValue: Future<int>.value(0)) as _i3.Future<int>);
@override
_i3.Future<int> insert(String? table, Map<String, Object?>? values,
{String? nullColumnHack, _i4.ConflictAlgorithm? conflictAlgorithm}) =>
(super.noSuchMethod(
Invocation.method(#insert, [
table,
values
], {
#nullColumnHack: nullColumnHack,
#conflictAlgorithm: conflictAlgorithm
}),
returnValue: Future<int>.value(0)) as _i3.Future<int>);
@override
_i3.Future<List<Map<String, Object?>>> query(String? table,
{bool? distinct,
List<String>? columns,
String? where,
List<Object?>? whereArgs,
String? groupBy,
String? having,
String? orderBy,
int? limit,
int? offset}) =>
(super.noSuchMethod(
Invocation.method(#query, [
table
], {
#distinct: distinct,
#columns: columns,
#where: where,
#whereArgs: whereArgs,
#groupBy: groupBy,
#having: having,
#orderBy: orderBy,
#limit: limit,
#offset: offset
}),
returnValue: Future<List<Map<String, Object?>>>.value(
<Map<String, Object?>>[]))
as _i3.Future<List<Map<String, Object?>>>);
@override
_i3.Future<List<Map<String, Object?>>> rawQuery(String? sql,
[List<Object?>? arguments]) =>
(super.noSuchMethod(Invocation.method(#rawQuery, [sql, arguments]),
returnValue: Future<List<Map<String, Object?>>>.value(
<Map<String, Object?>>[]))
as _i3.Future<List<Map<String, Object?>>>);
@override
_i3.Future<int> rawUpdate(String? sql, [List<Object?>? arguments]) =>
(super.noSuchMethod(Invocation.method(#rawUpdate, [sql, arguments]),
returnValue: Future<int>.value(0)) as _i3.Future<int>);
@override
_i3.Future<int> update(String? table, Map<String, Object?>? values,
{String? where,
List<Object?>? whereArgs,
_i4.ConflictAlgorithm? conflictAlgorithm}) =>
(super.noSuchMethod(
Invocation.method(#update, [
table,
values
], {
#where: where,
#whereArgs: whereArgs,
#conflictAlgorithm: conflictAlgorithm
}),
returnValue: Future<int>.value(0)) as _i3.Future<int>);
@override
_i3.Future<int> rawDelete(String? sql, [List<Object?>? arguments]) =>
(super.noSuchMethod(Invocation.method(#rawDelete, [sql, arguments]),
returnValue: Future<int>.value(0)) as _i3.Future<int>);
@override
_i3.Future<int> delete(String? table,
{String? where, List<Object?>? whereArgs}) =>
(super.noSuchMethod(
Invocation.method(
#delete, [table], {#where: where, #whereArgs: whereArgs}),
returnValue: Future<int>.value(0)) as _i3.Future<int>);
@override
_i2.Batch batch() => (super.noSuchMethod(Invocation.method(#batch, []),
returnValue: _FakeBatch_0()) as _i2.Batch);
}
/// A class which mocks [Batch].
///
/// See the documentation for Mockito's code generation for more information.
class MockBatch extends _i1.Mock implements _i2.Batch {
MockBatch() {
_i1.throwOnMissingStub(this);
}
@override
_i3.Future<List<Object?>> commit(
{bool? exclusive, bool? noResult, bool? continueOnError}) =>
(super.noSuchMethod(
Invocation.method(#commit, [], {
#exclusive: exclusive,
#noResult: noResult,
#continueOnError: continueOnError
}),
returnValue: Future<List<Object?>>.value(<Object?>[]))
as _i3.Future<List<Object?>>);
@override
void rawInsert(String? sql, [List<Object?>? arguments]) =>
super.noSuchMethod(Invocation.method(#rawInsert, [sql, arguments]),
returnValueForMissingStub: null);
@override
void insert(String? table, Map<String, Object?>? values,
{String? nullColumnHack, _i4.ConflictAlgorithm? conflictAlgorithm}) =>
super.noSuchMethod(
Invocation.method(#insert, [
table,
values
], {
#nullColumnHack: nullColumnHack,
#conflictAlgorithm: conflictAlgorithm
}),
returnValueForMissingStub: null);
@override
void rawUpdate(String? sql, [List<Object?>? arguments]) =>
super.noSuchMethod(Invocation.method(#rawUpdate, [sql, arguments]),
returnValueForMissingStub: null);
@override
void update(String? table, Map<String, Object?>? values,
{String? where,
List<Object?>? whereArgs,
_i4.ConflictAlgorithm? conflictAlgorithm}) =>
super.noSuchMethod(
Invocation.method(#update, [
table,
values
], {
#where: where,
#whereArgs: whereArgs,
#conflictAlgorithm: conflictAlgorithm
}),
returnValueForMissingStub: null);
@override
void rawDelete(String? sql, [List<Object?>? arguments]) =>
super.noSuchMethod(Invocation.method(#rawDelete, [sql, arguments]),
returnValueForMissingStub: null);
@override
void delete(String? table, {String? where, List<Object?>? whereArgs}) =>
super.noSuchMethod(
Invocation.method(
#delete, [table], {#where: where, #whereArgs: whereArgs}),
returnValueForMissingStub: null);
@override
void execute(String? sql, [List<Object?>? arguments]) =>
super.noSuchMethod(Invocation.method(#execute, [sql, arguments]),
returnValueForMissingStub: null);
@override
void query(String? table,
{bool? distinct,
List<String>? columns,
String? where,
List<Object?>? whereArgs,
String? groupBy,
String? having,
String? orderBy,
int? limit,
int? offset}) =>
super.noSuchMethod(
Invocation.method(#query, [
table
], {
#distinct: distinct,
#columns: columns,
#where: where,
#whereArgs: whereArgs,
#groupBy: groupBy,
#having: having,
#orderBy: orderBy,
#limit: limit,
#offset: offset
}),
returnValueForMissingStub: null);
@override
void rawQuery(String? sql, [List<Object?>? arguments]) =>
super.noSuchMethod(Invocation.method(#rawQuery, [sql, arguments]),
returnValueForMissingStub: null);
}
If you’d like to see any other files, please let me know and I’ll edit the post to include them. Please let me know what you think. Like I said, I’m a beginner so hopefully this issue is something simple.