blob: 498213a6f7b0a307467ecdfe8df43ac9176734dd [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:async';
import 'dart:convert';
import 'dart:io' as io show IOSink, Stdout, StdoutException;
import 'package:flutter_migrate/src/base/io.dart';
import 'package:flutter_migrate/src/base/logger.dart';
import 'package:test/fake.dart';
/// An IOSink that completes a future with the first line written to it.
class CompleterIOSink extends MemoryIOSink {
CompleterIOSink({
this.throwOnAdd = false,
});
final bool throwOnAdd;
final Completer<List<int>> _completer = Completer<List<int>>();
Future<List<int>> get future => _completer.future;
@override
void add(List<int> data) {
if (!_completer.isCompleted) {
// When throwOnAdd is true, complete with empty so any expected output
// doesn't appear.
_completer.complete(throwOnAdd ? <int>[] : data);
}
if (throwOnAdd) {
throw Exception('CompleterIOSink Error');
}
super.add(data);
}
}
/// An IOSink that collects whatever is written to it.
class MemoryIOSink implements IOSink {
@override
Encoding encoding = utf8;
final List<List<int>> writes = <List<int>>[];
@override
void add(List<int> data) {
writes.add(data);
}
@override
Future<void> addStream(Stream<List<int>> stream) {
final Completer<void> completer = Completer<void>();
late StreamSubscription<List<int>> sub;
sub = stream.listen(
(List<int> data) {
try {
add(data);
// Catches all exceptions to propagate them to the completer.
} catch (err, stack) {
// ignore: avoid_catches_without_on_clauses
sub.cancel();
completer.completeError(err, stack);
}
},
onError: completer.completeError,
onDone: completer.complete,
cancelOnError: true,
);
return completer.future;
}
@override
void writeCharCode(int charCode) {
add(<int>[charCode]);
}
@override
void write(Object? obj) {
add(encoding.encode('$obj'));
}
@override
void writeln([Object? obj = '']) {
add(encoding.encode('$obj\n'));
}
@override
void writeAll(Iterable<dynamic> objects, [String separator = '']) {
bool addSeparator = false;
for (final dynamic object in objects) {
if (addSeparator) {
write(separator);
}
write(object);
addSeparator = true;
}
}
@override
void addError(dynamic error, [StackTrace? stackTrace]) {
throw UnimplementedError();
}
@override
Future<void> get done => close();
@override
Future<void> close() async {}
@override
Future<void> flush() async {}
void clear() {
writes.clear();
}
String getAndClear() {
final String result =
utf8.decode(writes.expand((List<int> l) => l).toList());
clear();
return result;
}
}
class MemoryStdout extends MemoryIOSink implements io.Stdout {
@override
bool get hasTerminal => _hasTerminal;
set hasTerminal(bool value) {
_hasTerminal = value;
}
bool _hasTerminal = true;
@override
io.IOSink get nonBlocking => this;
@override
bool get supportsAnsiEscapes => _supportsAnsiEscapes;
set supportsAnsiEscapes(bool value) {
_supportsAnsiEscapes = value;
}
bool _supportsAnsiEscapes = true;
@override
int get terminalColumns {
if (_terminalColumns != null) {
return _terminalColumns!;
}
throw const io.StdoutException('unspecified mock value');
}
set terminalColumns(int value) => _terminalColumns = value;
int? _terminalColumns;
@override
int get terminalLines {
if (_terminalLines != null) {
return _terminalLines!;
}
throw const io.StdoutException('unspecified mock value');
}
set terminalLines(int value) => _terminalLines = value;
int? _terminalLines;
}
/// A Stdio that collects stdout and supports simulated stdin.
class FakeStdio extends Stdio {
final MemoryStdout _stdout = MemoryStdout()..terminalColumns = 80;
final MemoryIOSink _stderr = MemoryIOSink();
final FakeStdin _stdin = FakeStdin();
@override
MemoryStdout get stdout => _stdout;
@override
MemoryIOSink get stderr => _stderr;
@override
Stream<List<int>> get stdin => _stdin;
void simulateStdin(String line) {
_stdin.controller.add(utf8.encode('$line\n'));
}
@override
bool hasTerminal = true;
List<String> get writtenToStdout =>
_stdout.writes.map<String>(_stdout.encoding.decode).toList();
List<String> get writtenToStderr =>
_stderr.writes.map<String>(_stderr.encoding.decode).toList();
}
class FakeStdin extends Fake implements Stdin {
final StreamController<List<int>> controller = StreamController<List<int>>();
@override
bool echoMode = true;
@override
bool hasTerminal = true;
@override
bool echoNewlineMode = true;
@override
bool lineMode = true;
@override
Stream<S> transform<S>(StreamTransformer<List<int>, S> transformer) {
return controller.stream.transform(transformer);
}
@override
StreamSubscription<List<int>> listen(
void Function(List<int> event)? onData, {
Function? onError,
void Function()? onDone,
bool? cancelOnError,
}) {
return controller.stream.listen(
onData,
onError: onError,
onDone: onDone,
cancelOnError: cancelOnError,
);
}
}
class FakeStopwatch implements Stopwatch {
@override
bool get isRunning => _isRunning;
bool _isRunning = false;
@override
void start() => _isRunning = true;
@override
void stop() => _isRunning = false;
@override
Duration elapsed = Duration.zero;
@override
int get elapsedMicroseconds => elapsed.inMicroseconds;
@override
int get elapsedMilliseconds => elapsed.inMilliseconds;
@override
int get elapsedTicks => elapsed.inMilliseconds;
@override
int get frequency => 1000;
@override
void reset() {
_isRunning = false;
elapsed = Duration.zero;
}
@override
String toString() => 'FakeStopwatch $elapsed $isRunning';
}
class FakeStopwatchFactory implements StopwatchFactory {
FakeStopwatchFactory(
{Stopwatch? stopwatch, Map<String, Stopwatch>? stopwatches})
: stopwatches = <String, Stopwatch>{
if (stopwatches != null) ...stopwatches,
if (stopwatch != null) '': stopwatch,
};
Map<String, Stopwatch> stopwatches;
@override
Stopwatch createStopwatch([String name = '']) {
return stopwatches[name] ?? FakeStopwatch();
}
}