test/must_pub_get_test.dart - pub - Git at Google

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. 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:io';

 import 'package:path/path.dart' as p;
 import 'package:test/test.dart';

 import 'package:pub/src/exit_codes.dart' as exit_codes;
 import 'package:pub/src/io.dart';

 import 'descriptor.dart' as d;
 import 'test_pub.dart';

 void main() {
   setUp(() async {
     await servePackages((builder) {
       builder.serve('foo', '1.0.0');
       builder.serve('foo', '2.0.0');
     });

     await d.dir(appPath, [
       d.appPubspec(),
       d.dir('web', []),
       d.dir('bin', [d.file('script.dart', "main() => print('hello!');")])
     ]).create();

     await pubGet();
   });

   group('requires the user to run pub get first if', () {
     group("there's no lockfile", () {
       setUp(() {
         deleteEntry(p.join(d.sandbox, 'myapp/pubspec.lock'));
       });

       _requiresPubGet(
           'No pubspec.lock file found, please run "pub get" first.');
     });

     group("there's no .packages", () {
       setUp(() {
         deleteEntry(p.join(d.sandbox, 'myapp/.packages'));
       });

       _requiresPubGet('No .packages file found, please run "pub get" first.');
     });

     group("there's no package_config.json", () {
       setUp(() {
         deleteEntry(p.join(d.sandbox, 'myapp/.dart_tool/package_config.json'));
       });

       _requiresPubGet(
           'No .dart_tool/package_config.json file found, please run "pub get".');
     });

     group('the pubspec has a new dependency', () {
       setUp(() async {
         await d.dir('foo', [d.libPubspec('foo', '1.0.0')]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'foo': {'path': '../foo'}
           })
         ]).create();

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.yaml');
       });

       _requiresPubGet('The pubspec.yaml file has changed since the '
           'pubspec.lock file was generated, please run "pub get" again.');
     });

     group('the lockfile has a dependency from the wrong source', () {
       setUp(() async {
         await d.dir(appPath, [
           d.appPubspec({'foo': '1.0.0'})
         ]).create();

         await pubGet();

         await createLockFile(appPath, sandbox: ['foo']);

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.yaml');
       });

       _requiresPubGet('The pubspec.yaml file has changed since the '
           'pubspec.lock file was generated, please run "pub get" again.');
     });

     group('the lockfile has a dependency from an unknown source', () {
       setUp(() async {
         await d.dir(appPath, [
           d.appPubspec({'foo': '1.0.0'})
         ]).create();

         await pubGet();

         await d.dir(appPath, [
           d.file(
               'pubspec.lock',
               yaml({
                 'packages': {
                   'foo': {
                     'description': 'foo',
                     'version': '1.0.0',
                     'source': 'sdk'
                   }
                 }
               }))
         ]).create();

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.yaml');
       });

       _requiresPubGet('The pubspec.yaml file has changed since the '
           'pubspec.lock file was generated, please run "pub get" again.');
     });

     group('the lockfile has a dependency with the wrong description', () {
       setUp(() async {
         await d.dir('bar', [d.libPubspec('foo', '1.0.0')]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'foo': {'path': '../bar'}
           })
         ]).create();

         await pubGet();

         await createLockFile(appPath, sandbox: ['foo']);

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.yaml');
       });

       _requiresPubGet('The pubspec.yaml file has changed since the '
           'pubspec.lock file was generated, please run "pub get" again.');
     });

     group('the pubspec has an incompatible version of a dependency', () {
       setUp(() async {
         await d.dir(appPath, [
           d.appPubspec({'foo': '1.0.0'})
         ]).create();

         await pubGet();

         await d.dir(appPath, [
           d.appPubspec({'foo': '2.0.0'})
         ]).create();

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.yaml');
       });

       _requiresPubGet('The pubspec.yaml file has changed since the '
           'pubspec.lock file was generated, please run "pub get" again.');
     });

     group(
         'the lockfile is pointing to an unavailable package with a newer '
         'pubspec', () {
       setUp(() async {
         await d.dir(appPath, [
           d.appPubspec({'foo': '1.0.0'})
         ]).create();

         await pubGet();

         deleteEntry(p.join(d.sandbox, cachePath));

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.yaml');
       });

       _requiresPubGet('The pubspec.yaml file has changed since the '
           'pubspec.lock file was generated, please run "pub get" again.');
     });

     group(
         'the lockfile is pointing to an unavailable package with an older '
         '.packages', () {
       setUp(() async {
         await d.dir(appPath, [
           d.appPubspec({'foo': '1.0.0'})
         ]).create();

         await pubGet();

         deleteEntry(p.join(d.sandbox, cachePath));

         // Ensure that the lockfile looks newer than the .packages file.
         await _touch('pubspec.lock');
       });

       _requiresPubGet('The pubspec.lock file has changed since the .packages '
           'file was generated, please run "pub get" again.');
     });

     group("the lockfile has a package that the .packages file doesn't", () {
       setUp(() async {
         await d.dir('foo', [d.libPubspec('foo', '1.0.0')]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'foo': {'path': '../foo'}
           })
         ]).create();

         await pubGet();

         await createPackagesFile(appPath);

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.lock');
       });

       _requiresPubGet('The pubspec.lock file has changed since the .packages '
           'file was generated, please run "pub get" again.');
     });

     group('the .packages file has a package with a non-file URI', () {
       setUp(() async {
         await d.dir('foo', [d.libPubspec('foo', '1.0.0')]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'foo': {'path': '../foo'}
           })
         ]).create();

         await pubGet();

         await d.dir(appPath, [
           d.file('.packages', '''
 myapp:lib
 foo:http://example.com/
 ''')
         ]).create();

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.lock');
       });

       _requiresPubGet('The pubspec.lock file has changed since the .packages '
           'file was generated, please run "pub get" again.');
     });

     group('the .packages file points to the wrong place', () {
       setUp(() async {
         await d.dir('bar', [d.libPubspec('foo', '1.0.0')]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'foo': {'path': '../bar'}
           })
         ]).create();

         await pubGet();

         await createPackagesFile(appPath, sandbox: ['foo']);

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.lock');
       });

       _requiresPubGet('The pubspec.lock file has changed since the .packages '
           'file was generated, please run "pub get" again.');
     });

     group('the package_config.json file points to the wrong place', () {
       setUp(() async {
         await d.dir('bar', [d.libPubspec('foo', '1.0.0')]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'foo': {'path': '../bar'}
           })
         ]).create();

         await pubGet();

         await d.dir(appPath, [
           d.packageConfigFile([
             d.packageConfigEntry(
               name: 'foo',
               path: '../foo', // this is the wrong path
             ),
             d.packageConfigEntry(
               name: 'myapp',
               path: '.',
             ),
           ]),
         ]).create();

         // Ensure that the pubspec looks newer than the lockfile.
         await _touch('pubspec.lock');
       });

       _requiresPubGet('The pubspec.lock file has changed since the '
           '.dart_tool/package_config.json file was generated, '
           'please run "pub get" again.');
     });

     group("the lock file's SDK constraint doesn't match the current SDK", () {
       setUp(() async {
         // Avoid using a path dependency because it triggers the full validation
         // logic. We want to be sure SDK-validation works without that logic.
         globalPackageServer.add((builder) {
           builder.serve('foo', '3.0.0', pubspec: {
             'environment': {'sdk': '>=1.0.0 <2.0.0'}
           });
         });

         await d.dir(appPath, [
           d.pubspec({
             'name': 'myapp',
             'dependencies': {'foo': '3.0.0'},
             'environment': {
               'sdk': '>=1.0.0 <2.0.0',
             },
           }),
         ]).create();

         await pubGet(environment: {'_PUB_TEST_SDK_VERSION': '1.2.3+4'});
       });

       _requiresPubGet("Dart 0.1.2+3 is incompatible with your dependencies' "
           'SDK constraints. Please run \"pub get\" again.');
     });

     test(
         "the lock file's Flutter SDK constraint doesn't match the "
         'current Flutter SDK', () async {
       // Avoid using a path dependency because it triggers the full validation
       // logic. We want to be sure SDK-validation works without that logic.
       globalPackageServer.add((builder) {
         builder.serve('foo', '3.0.0', pubspec: {
           'environment': {'flutter': '>=1.0.0 <2.0.0'}
         });
       });

       await d.dir('flutter', [d.file('version', '1.2.3')]).create();

       await d.dir(appPath, [
         d.appPubspec({'foo': '3.0.0'})
       ]).create();

       await pubGet(environment: {'FLUTTER_ROOT': p.join(d.sandbox, 'flutter')});

       await d.dir('flutter', [d.file('version', '2.4.6')]).create();

       // Run pub manually here because otherwise we don't have access to
       // d.sandbox.
       await runPub(
           args: ['run', 'script'],
           environment: {'FLUTTER_ROOT': p.join(d.sandbox, 'flutter')},
           error: "Flutter 2.4.6 is incompatible with your dependencies' SDK "
               'constraints. Please run "pub get" again.',
           exitCode: exit_codes.DATA);
     });

     group("a path dependency's dependency doesn't match the lockfile", () {
       setUp(() async {
         await d.dir('bar', [
           d.libPubspec('bar', '1.0.0', deps: {'foo': '1.0.0'})
         ]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'bar': {'path': '../bar'}
           })
         ]).create();

         await pubGet();

         // Update bar's pubspec without touching the app's.
         await d.dir('bar', [
           d.libPubspec('bar', '1.0.0', deps: {'foo': '2.0.0'})
         ]).create();
       });

       _requiresPubGet('${p.join('..', 'bar', 'pubspec.yaml')} has changed '
           'since the pubspec.lock file was generated, please run "pub get" '
           'again.');
     });

     group(
         "a path dependency's language version doesn't match the package_config.json",
         () {
       setUp(() async {
         await d.dir('bar', [
           d.libPubspec(
             'bar',
             '1.0.0',
             deps: {'foo': '1.0.0'},
             // Creates language version requirement 0.0
             sdk: '>= 0.0.1 <=0.9.9', // tests runs with '0.1.2+3'
           ),
         ]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'bar': {'path': '../bar'}
           })
         ]).create();

         await pubGet();

         // Update bar's pubspec without touching the app's.
         await d.dir('bar', [
           d.libPubspec(
             'bar',
             '1.0.0',
             deps: {'foo': '1.0.0'},
             // Creates language version requirement 0.1
             sdk: '>= 0.1.0 <=0.9.9', // tests runs with '0.1.2+3'
           ),
         ]).create();
       });

       _requiresPubGet('${p.join('..', 'bar', 'pubspec.yaml')} has changed '
           'since the pubspec.lock file was generated, please run "pub get" '
           'again.');
     });
   });

   group("doesn't require the user to run pub get first if", () {
     group(
         'the pubspec is older than the lockfile which is older than the '
         'packages file, even if the contents are wrong', () {
       setUp(() async {
         await d.dir(appPath, [
           d.appPubspec({'foo': '1.0.0'})
         ]).create();
         // Ensure we get a new mtime (mtime is only reported with 1s precision)
         await _touch('pubspec.yaml');

         await _touch('pubspec.lock');
         await _touch('.packages');
         await _touch('.dart_tool/package_config.json');
       });

       _runsSuccessfully(runDeps: false);
     });

     group("the pubspec is newer than the lockfile, but they're up-to-date", () {
       setUp(() async {
         await d.dir(appPath, [
           d.appPubspec({'foo': '1.0.0'})
         ]).create();

         await pubGet();

         await _touch('pubspec.yaml');
       });

       _runsSuccessfully();
     });

     // Regression test for #1416
     group('a path dependency has a dependency on the root package', () {
       setUp(() async {
         await d.dir('foo', [
           d.libPubspec('foo', '1.0.0', deps: {'myapp': 'any'})
         ]).create();

         await d.dir(appPath, [
           d.appPubspec({
             'foo': {'path': '../foo'}
           })
         ]).create();

         await pubGet();

         await _touch('pubspec.lock');
       });

       _runsSuccessfully();
     });

     group(
         "the lockfile is newer than .packages and package_config.json, but they're up-to-date",
         () {
       setUp(() async {
         await d.dir(appPath, [
           d.appPubspec({'foo': '1.0.0'})
         ]).create();

         await pubGet();

         await _touch('pubspec.lock');
       });

       _runsSuccessfully();
     });

     group("an overridden dependency's SDK constraint is unmatched", () {
       setUp(() async {
         globalPackageServer.add((builder) {
           builder.serve('bar', '1.0.0', pubspec: {
             'environment': {'sdk': '0.0.0-fake'}
           });
         });

         await d.dir(appPath, [
           d.pubspec({
             'name': 'myapp',
             'dependency_overrides': {'bar': '1.0.0'}
           })
         ]).create();

         await pubGet();

         await _touch('pubspec.lock');
       });

       _runsSuccessfully();
     });

     test('the lock file has a Flutter SDK but Flutter is unavailable',
         () async {
       // Avoid using a path dependency because it triggers the full validation
       // logic. We want to be sure SDK-validation works without that logic.
       globalPackageServer.add((builder) {
         builder.serve('foo', '3.0.0', pubspec: {
           'environment': {'flutter': '>=1.0.0 <2.0.0'}
         });
       });

       await d.dir('flutter', [d.file('version', '1.2.3')]).create();

       await d.dir(appPath, [
         d.appPubspec({'foo': '3.0.0'})
       ]).create();

       await pubGet(environment: {'FLUTTER_ROOT': p.join(d.sandbox, 'flutter')});

       await d.dir('flutter', [d.file('version', '2.4.6')]).create();

       // Run pub manually here because otherwise we don't have access to
       // d.sandbox.
       await runPub(args: ['run', 'bin/script.dart']);
     });
   });
 }

 /// Runs every command that care about the world being up-to-date, and asserts
 /// that it prints [message] as part of its error.
 void _requiresPubGet(String message) {
   for (var command in ['run', 'deps']) {
     test('for pub $command', () {
       var args = [command];
       if (command == 'run') args.add('script');

       return runPub(
           args: args, error: contains(message), exitCode: exit_codes.DATA);
     });
   }
 }

 /// Ensures that pub doesn't require "pub get" for the current package.
 ///
 /// If [runDeps] is false, `pub deps` isn't included in the test. This is
 /// sometimes not desirable, since it uses slightly stronger checks for pubspec
 /// and lockfile consistency.
 void _runsSuccessfully({bool runDeps = true}) {
   var commands = ['run'];
   if (runDeps) commands.add('deps');

   for (var command in commands) {
     test('for pub $command', () async {
       var args = [command];
       if (command == 'run') args.add('bin/script.dart');

       await runPub(args: args);

       // If pub determines that everything is up-to-date, it should set the
       // mtimes to indicate that.
       var pubspecModified =
           File(p.join(d.sandbox, 'myapp/pubspec.yaml')).lastModifiedSync();
       var lockFileModified =
           File(p.join(d.sandbox, 'myapp/pubspec.lock')).lastModifiedSync();
       var packagesModified =
           File(p.join(d.sandbox, 'myapp/.packages')).lastModifiedSync();
       var packageConfigModified =
           File(p.join(d.sandbox, 'myapp/.dart_tool/package_config.json'))
               .lastModifiedSync();

       expect(!pubspecModified.isAfter(lockFileModified), isTrue);
       expect(!lockFileModified.isAfter(packagesModified), isTrue);
       expect(!lockFileModified.isAfter(packageConfigModified), isTrue);
     });
   }
 }

 /// Schedules a non-semantic modification to [path].
 Future _touch(String path) async {
   // Delay a bit to make sure the modification times are noticeably different.
   // 1s seems to be the finest granularity that dart:io reports.
   await Future.delayed(Duration(seconds: 1));

   path = p.join(d.sandbox, 'myapp', path);
   touch(path);
 }
	// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
	// for details. 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:io';

	import 'package:path/path.dart' as p;
	import 'package:test/test.dart';

	import 'package:pub/src/exit_codes.dart' as exit_codes;
	import 'package:pub/src/io.dart';

	import 'descriptor.dart' as d;
	import 'test_pub.dart';

	void main() {
	setUp(() async {
	await servePackages((builder) {
	builder.serve('foo', '1.0.0');
	builder.serve('foo', '2.0.0');
	});

	await d.dir(appPath, [
	d.appPubspec(),
	d.dir('web', []),
	d.dir('bin', [d.file('script.dart', "main() => print('hello!');")])
	]).create();

	await pubGet();
	});

	group('requires the user to run pub get first if', () {
	group("there's no lockfile", () {
	setUp(() {
	deleteEntry(p.join(d.sandbox, 'myapp/pubspec.lock'));
	});

	_requiresPubGet(
	'No pubspec.lock file found, please run "pub get" first.');
	});

	group("there's no .packages", () {
	setUp(() {
	deleteEntry(p.join(d.sandbox, 'myapp/.packages'));
	});

	_requiresPubGet('No .packages file found, please run "pub get" first.');
	});

	group("there's no package_config.json", () {
	setUp(() {
	deleteEntry(p.join(d.sandbox, 'myapp/.dart_tool/package_config.json'));
	});

	_requiresPubGet(
	'No .dart_tool/package_config.json file found, please run "pub get".');
	});

	group('the pubspec has a new dependency', () {
	setUp(() async {
	await d.dir('foo', [d.libPubspec('foo', '1.0.0')]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'foo': {'path': '../foo'}
	})
	]).create();

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.yaml');
	});

	_requiresPubGet('The pubspec.yaml file has changed since the '
	'pubspec.lock file was generated, please run "pub get" again.');
	});

	group('the lockfile has a dependency from the wrong source', () {
	setUp(() async {
	await d.dir(appPath, [
	d.appPubspec({'foo': '1.0.0'})
	]).create();

	await pubGet();

	await createLockFile(appPath, sandbox: ['foo']);

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.yaml');
	});

	_requiresPubGet('The pubspec.yaml file has changed since the '
	'pubspec.lock file was generated, please run "pub get" again.');
	});

	group('the lockfile has a dependency from an unknown source', () {
	setUp(() async {
	await d.dir(appPath, [
	d.appPubspec({'foo': '1.0.0'})
	]).create();

	await pubGet();

	await d.dir(appPath, [
	d.file(
	'pubspec.lock',
	yaml({
	'packages': {
	'foo': {
	'description': 'foo',
	'version': '1.0.0',
	'source': 'sdk'
	}
	}
	}))
	]).create();

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.yaml');
	});

	_requiresPubGet('The pubspec.yaml file has changed since the '
	'pubspec.lock file was generated, please run "pub get" again.');
	});

	group('the lockfile has a dependency with the wrong description', () {
	setUp(() async {
	await d.dir('bar', [d.libPubspec('foo', '1.0.0')]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'foo': {'path': '../bar'}
	})
	]).create();

	await pubGet();

	await createLockFile(appPath, sandbox: ['foo']);

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.yaml');
	});

	_requiresPubGet('The pubspec.yaml file has changed since the '
	'pubspec.lock file was generated, please run "pub get" again.');
	});

	group('the pubspec has an incompatible version of a dependency', () {
	setUp(() async {
	await d.dir(appPath, [
	d.appPubspec({'foo': '1.0.0'})
	]).create();

	await pubGet();

	await d.dir(appPath, [
	d.appPubspec({'foo': '2.0.0'})
	]).create();

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.yaml');
	});

	_requiresPubGet('The pubspec.yaml file has changed since the '
	'pubspec.lock file was generated, please run "pub get" again.');
	});

	group(
	'the lockfile is pointing to an unavailable package with a newer '
	'pubspec', () {
	setUp(() async {
	await d.dir(appPath, [
	d.appPubspec({'foo': '1.0.0'})
	]).create();

	await pubGet();

	deleteEntry(p.join(d.sandbox, cachePath));

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.yaml');
	});

	_requiresPubGet('The pubspec.yaml file has changed since the '
	'pubspec.lock file was generated, please run "pub get" again.');
	});

	group(
	'the lockfile is pointing to an unavailable package with an older '
	'.packages', () {
	setUp(() async {
	await d.dir(appPath, [
	d.appPubspec({'foo': '1.0.0'})
	]).create();

	await pubGet();

	deleteEntry(p.join(d.sandbox, cachePath));

	// Ensure that the lockfile looks newer than the .packages file.
	await _touch('pubspec.lock');
	});

	_requiresPubGet('The pubspec.lock file has changed since the .packages '
	'file was generated, please run "pub get" again.');
	});

	group("the lockfile has a package that the .packages file doesn't", () {
	setUp(() async {
	await d.dir('foo', [d.libPubspec('foo', '1.0.0')]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'foo': {'path': '../foo'}
	})
	]).create();

	await pubGet();

	await createPackagesFile(appPath);

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.lock');
	});

	_requiresPubGet('The pubspec.lock file has changed since the .packages '
	'file was generated, please run "pub get" again.');
	});

	group('the .packages file has a package with a non-file URI', () {
	setUp(() async {
	await d.dir('foo', [d.libPubspec('foo', '1.0.0')]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'foo': {'path': '../foo'}
	})
	]).create();

	await pubGet();

	await d.dir(appPath, [
	d.file('.packages', '''
	myapp:lib
	foo:http://example.com/
	''')
	]).create();

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.lock');
	});

	_requiresPubGet('The pubspec.lock file has changed since the .packages '
	'file was generated, please run "pub get" again.');
	});

	group('the .packages file points to the wrong place', () {
	setUp(() async {
	await d.dir('bar', [d.libPubspec('foo', '1.0.0')]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'foo': {'path': '../bar'}
	})
	]).create();

	await pubGet();

	await createPackagesFile(appPath, sandbox: ['foo']);

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.lock');
	});

	_requiresPubGet('The pubspec.lock file has changed since the .packages '
	'file was generated, please run "pub get" again.');
	});

	group('the package_config.json file points to the wrong place', () {
	setUp(() async {
	await d.dir('bar', [d.libPubspec('foo', '1.0.0')]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'foo': {'path': '../bar'}
	})
	]).create();

	await pubGet();

	await d.dir(appPath, [
	d.packageConfigFile([
	d.packageConfigEntry(
	name: 'foo',
	path: '../foo', // this is the wrong path
	),
	d.packageConfigEntry(
	name: 'myapp',
	path: '.',
	),
	]),
	]).create();

	// Ensure that the pubspec looks newer than the lockfile.
	await _touch('pubspec.lock');
	});

	_requiresPubGet('The pubspec.lock file has changed since the '
	'.dart_tool/package_config.json file was generated, '
	'please run "pub get" again.');
	});

	group("the lock file's SDK constraint doesn't match the current SDK", () {
	setUp(() async {
	// Avoid using a path dependency because it triggers the full validation
	// logic. We want to be sure SDK-validation works without that logic.
	globalPackageServer.add((builder) {
	builder.serve('foo', '3.0.0', pubspec: {
	'environment': {'sdk': '>=1.0.0 <2.0.0'}
	});
	});

	await d.dir(appPath, [
	d.pubspec({
	'name': 'myapp',
	'dependencies': {'foo': '3.0.0'},
	'environment': {
	'sdk': '>=1.0.0 <2.0.0',
	},
	}),
	]).create();

	await pubGet(environment: {'_PUB_TEST_SDK_VERSION': '1.2.3+4'});
	});

	_requiresPubGet("Dart 0.1.2+3 is incompatible with your dependencies' "
	'SDK constraints. Please run \"pub get\" again.');
	});

	test(
	"the lock file's Flutter SDK constraint doesn't match the "
	'current Flutter SDK', () async {
	// Avoid using a path dependency because it triggers the full validation
	// logic. We want to be sure SDK-validation works without that logic.
	globalPackageServer.add((builder) {
	builder.serve('foo', '3.0.0', pubspec: {
	'environment': {'flutter': '>=1.0.0 <2.0.0'}
	});
	});

	await d.dir('flutter', [d.file('version', '1.2.3')]).create();

	await d.dir(appPath, [
	d.appPubspec({'foo': '3.0.0'})
	]).create();

	await pubGet(environment: {'FLUTTER_ROOT': p.join(d.sandbox, 'flutter')});

	await d.dir('flutter', [d.file('version', '2.4.6')]).create();

	// Run pub manually here because otherwise we don't have access to
	// d.sandbox.
	await runPub(
	args: ['run', 'script'],
	environment: {'FLUTTER_ROOT': p.join(d.sandbox, 'flutter')},
	error: "Flutter 2.4.6 is incompatible with your dependencies' SDK "
	'constraints. Please run "pub get" again.',
	exitCode: exit_codes.DATA);
	});

	group("a path dependency's dependency doesn't match the lockfile", () {
	setUp(() async {
	await d.dir('bar', [
	d.libPubspec('bar', '1.0.0', deps: {'foo': '1.0.0'})
	]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'bar': {'path': '../bar'}
	})
	]).create();

	await pubGet();

	// Update bar's pubspec without touching the app's.
	await d.dir('bar', [
	d.libPubspec('bar', '1.0.0', deps: {'foo': '2.0.0'})
	]).create();
	});

	_requiresPubGet('${p.join('..', 'bar', 'pubspec.yaml')} has changed '
	'since the pubspec.lock file was generated, please run "pub get" '
	'again.');
	});

	group(
	"a path dependency's language version doesn't match the package_config.json",
	() {
	setUp(() async {
	await d.dir('bar', [
	d.libPubspec(
	'bar',
	'1.0.0',
	deps: {'foo': '1.0.0'},
	// Creates language version requirement 0.0
	sdk: '>= 0.0.1 <=0.9.9', // tests runs with '0.1.2+3'
	),
	]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'bar': {'path': '../bar'}
	})
	]).create();

	await pubGet();

	// Update bar's pubspec without touching the app's.
	await d.dir('bar', [
	d.libPubspec(
	'bar',
	'1.0.0',
	deps: {'foo': '1.0.0'},
	// Creates language version requirement 0.1
	sdk: '>= 0.1.0 <=0.9.9', // tests runs with '0.1.2+3'
	),
	]).create();
	});

	_requiresPubGet('${p.join('..', 'bar', 'pubspec.yaml')} has changed '
	'since the pubspec.lock file was generated, please run "pub get" '
	'again.');
	});
	});

	group("doesn't require the user to run pub get first if", () {
	group(
	'the pubspec is older than the lockfile which is older than the '
	'packages file, even if the contents are wrong', () {
	setUp(() async {
	await d.dir(appPath, [
	d.appPubspec({'foo': '1.0.0'})
	]).create();
	// Ensure we get a new mtime (mtime is only reported with 1s precision)
	await _touch('pubspec.yaml');

	await _touch('pubspec.lock');
	await _touch('.packages');
	await _touch('.dart_tool/package_config.json');
	});

	_runsSuccessfully(runDeps: false);
	});

	group("the pubspec is newer than the lockfile, but they're up-to-date", () {
	setUp(() async {
	await d.dir(appPath, [
	d.appPubspec({'foo': '1.0.0'})
	]).create();

	await pubGet();

	await _touch('pubspec.yaml');
	});

	_runsSuccessfully();
	});

	// Regression test for #1416
	group('a path dependency has a dependency on the root package', () {
	setUp(() async {
	await d.dir('foo', [
	d.libPubspec('foo', '1.0.0', deps: {'myapp': 'any'})
	]).create();

	await d.dir(appPath, [
	d.appPubspec({
	'foo': {'path': '../foo'}
	})
	]).create();

	await pubGet();

	await _touch('pubspec.lock');
	});

	_runsSuccessfully();
	});

	group(
	"the lockfile is newer than .packages and package_config.json, but they're up-to-date",
	() {
	setUp(() async {
	await d.dir(appPath, [
	d.appPubspec({'foo': '1.0.0'})
	]).create();

	await pubGet();

	await _touch('pubspec.lock');
	});

	_runsSuccessfully();
	});

	group("an overridden dependency's SDK constraint is unmatched", () {
	setUp(() async {
	globalPackageServer.add((builder) {
	builder.serve('bar', '1.0.0', pubspec: {
	'environment': {'sdk': '0.0.0-fake'}
	});
	});

	await d.dir(appPath, [
	d.pubspec({
	'name': 'myapp',
	'dependency_overrides': {'bar': '1.0.0'}
	})
	]).create();

	await pubGet();

	await _touch('pubspec.lock');
	});

	_runsSuccessfully();
	});

	test('the lock file has a Flutter SDK but Flutter is unavailable',
	() async {
	// Avoid using a path dependency because it triggers the full validation
	// logic. We want to be sure SDK-validation works without that logic.
	globalPackageServer.add((builder) {
	builder.serve('foo', '3.0.0', pubspec: {
	'environment': {'flutter': '>=1.0.0 <2.0.0'}
	});
	});

	await d.dir('flutter', [d.file('version', '1.2.3')]).create();

	await d.dir(appPath, [
	d.appPubspec({'foo': '3.0.0'})
	]).create();

	await pubGet(environment: {'FLUTTER_ROOT': p.join(d.sandbox, 'flutter')});

	await d.dir('flutter', [d.file('version', '2.4.6')]).create();

	// Run pub manually here because otherwise we don't have access to
	// d.sandbox.
	await runPub(args: ['run', 'bin/script.dart']);
	});
	});
	}

	/// Runs every command that care about the world being up-to-date, and asserts
	/// that it prints [message] as part of its error.
	void _requiresPubGet(String message) {
	for (var command in ['run', 'deps']) {
	test('for pub $command', () {
	var args = [command];
	if (command == 'run') args.add('script');

	return runPub(
	args: args, error: contains(message), exitCode: exit_codes.DATA);
	});
	}
	}

	/// Ensures that pub doesn't require "pub get" for the current package.
	///
	/// If [runDeps] is false, `pub deps` isn't included in the test. This is
	/// sometimes not desirable, since it uses slightly stronger checks for pubspec
	/// and lockfile consistency.
	void _runsSuccessfully({bool runDeps = true}) {
	var commands = ['run'];
	if (runDeps) commands.add('deps');

	for (var command in commands) {
	test('for pub $command', () async {
	var args = [command];
	if (command == 'run') args.add('bin/script.dart');

	await runPub(args: args);

	// If pub determines that everything is up-to-date, it should set the
	// mtimes to indicate that.
	var pubspecModified =
	File(p.join(d.sandbox, 'myapp/pubspec.yaml')).lastModifiedSync();
	var lockFileModified =
	File(p.join(d.sandbox, 'myapp/pubspec.lock')).lastModifiedSync();
	var packagesModified =
	File(p.join(d.sandbox, 'myapp/.packages')).lastModifiedSync();
	var packageConfigModified =
	File(p.join(d.sandbox, 'myapp/.dart_tool/package_config.json'))
	.lastModifiedSync();

	expect(!pubspecModified.isAfter(lockFileModified), isTrue);
	expect(!lockFileModified.isAfter(packagesModified), isTrue);
	expect(!lockFileModified.isAfter(packageConfigModified), isTrue);
	});
	}
	}

	/// Schedules a non-semantic modification to [path].
	Future _touch(String path) async {
	// Delay a bit to make sure the modification times are noticeably different.
	// 1s seems to be the finest granularity that dart:io reports.
	await Future.delayed(Duration(seconds: 1));

	path = p.join(d.sandbox, 'myapp', path);
	touch(path);
	}