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[flutter_tools] throw error when argResults is null (#103827)

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Aman Verma 2022-05-18 01:07:08 +05:30 committed by GitHub
parent 9651f1d717
commit 8fbf89b9f2
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 17 additions and 19 deletions
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8
packages/flutter_tools/lib/src/runner/flutter_command.dart
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@ -1524,20 +1524,20 @@ abstract class FlutterCommand extends Command<void> {
/// Gets the parsed command-line option named [name] as a `bool?`.
bool? boolArg(String name) {
if (argResults == null || !argParser.options.containsKey(name)) {
if (!argParser.options.containsKey(name)) {
return null;
}
return argResults?[name] as bool?;
return argResults![name] as bool;
}
/// Gets the parsed command-line option named [name] as a `String`.
String? stringArgDeprecated(String name) => argResults?[name] as String?;
String? stringArg(String name) {
if (argResults == null || !argParser.options.containsKey(name)) {
if (!argParser.options.containsKey(name)) {
return null;
}
return argResults?[name] as String?;
return argResults![name] as String;
}
/// Gets the parsed command-line option named [name] as an `int`.

28
packages/flutter_tools/test/general.shard/args_test.dart
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@ -15,19 +15,6 @@ import '../src/context.dart';
import '../src/testbed.dart';
import 'runner/utils.dart';
class CommandDummy extends FlutterCommand{
@override
String get description => 'description';
@override
String get name => 'test';
@override
Future<FlutterCommandResult> runCommand() async {
return FlutterCommandResult.success();
}
}
void main() {
test('Help for command line arguments is consistently styled and complete', () => Testbed().run(() {
final FlutterCommandRunner runner = FlutterCommandRunner(verboseHelp: true);
@ -47,6 +34,9 @@ void main() {
final FlutterCommandRunner runner = FlutterCommandRunner(verboseHelp: true);
command.argParser.addFlag('key');
command.argParser.addFlag('key-false');
// argResults will be null at this point, if attempt to read them is made,
// exception `Null check operator used on a null value` would be thrown.
expect(() => command.boolArg('key'), throwsA(const TypeMatcher<TypeError>()));
runner.addCommand(command);
await runner.run(<String>['dummy', '--key']);
@ -62,11 +52,19 @@ void main() {
});
testUsingContext('String? safe argResults', () async {
final CommandDummy command = CommandDummy();
final DummyFlutterCommand command = DummyFlutterCommand(
commandFunction: () async {
return const FlutterCommandResult(ExitStatus.success);
}
);
final FlutterCommandRunner runner = FlutterCommandRunner(verboseHelp: true);
command.argParser.addOption('key');
// argResults will be null at this point, if attempt to read them is made,
// exception `Null check operator used on a null value` would be thrown
expect(() => command.stringArg('key'), throwsA(const TypeMatcher<TypeError>()));
runner.addCommand(command);
await runner.run(<String>['test', '--key=value']);
await runner.run(<String>['dummy', '--key=value']);
expect(command.stringArg('key'), 'value');
expect(command.stringArg('empty'), null);