Revert "Revert "Use native async/await support in pub.""

sdk/lib/_internal/pub_generated/test/transformer/cache_test.dart

-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.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.
-
-library pub_tests;
-
-import 'package:scheduled_test/scheduled_stream.dart';
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-import '../serve/utils.dart';
-
-const REPLACE_FROM_LIBRARY_TRANSFORMER = """
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-import 'package:bar/bar.dart';
-
-class ReplaceTransformer extends Transformer {
-  ReplaceTransformer.asPlugin();
-
-  String get allowedExtensions => '.dart';
-
-  Future apply(Transform transform) {
-    return transform.primaryInput.readAsString().then((contents) {
-      transform.addOutput(new Asset.fromString(
-          transform.primaryInput.id,
-          contents.replaceAll("Hello", replacement)));
-    });
-  }
-}
-""";
-
-// TODO(nweiz): Currently scheduled_test.setUp doesn't play well with test_pub,
-// since it only assigns the sandbox directory once the main test body has
-// run. Fix this and move this to a real setUp call.
-void setUp() {
-  servePackages((builder) {
-    builder.serveRepoPackage('barback');
-
-    builder.serve("foo", "1.2.3", deps: {
-      'barback': 'any'
-    },
-        contents: [
-            d.dir(
-                "lib",
-                [d.file("transformer.dart", replaceTransformer("Hello", "Goodbye"))])]);
-
-    builder.serve("bar", "1.2.3", deps: {
-      'barback': 'any'
-    },
-        contents: [
-            d.dir(
-                "lib",
-                [d.file("transformer.dart", replaceTransformer("Goodbye", "See ya"))])]);
-
-    builder.serve("baz", "1.2.3");
-  });
-
-  d.dir(appPath, [d.pubspec({
-      "name": "myapp",
-      "dependencies": {
-        "foo": "1.2.3",
-        "bar": "1.2.3"
-      },
-      "transformers": ["foo"]
-    }),
-        d.dir("bin", [d.file("myapp.dart", "main() => print('Hello!');")])]).create();
-
-  pubGet();
-}
-
-main() {
-  initConfig();
-
-  integration("caches a transformer snapshot", () {
-    setUp();
-
-    var process = pubRun(args: ['myapp']);
-    process.stdout.expect("Goodbye!");
-    process.shouldExit();
-
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                ".pub/transformers",
-                [
-                    d.file("manifest.txt", "0.1.2+3\nfoo"),
-                    d.matcherFile("transformers.snapshot", isNot(isEmpty))])]).validate();
-
-    // Run the executable again to make sure loading the transformer from the
-    // cache works.
-    process = pubRun(args: ['myapp']);
-    process.stdout.expect("Goodbye!");
-    process.shouldExit();
-  });
-
-  integration("recaches if the SDK version is out-of-date", () {
-    setUp();
-
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                ".pub/transformers",
-                [// The version 0.0.1 is different than the test version 0.1.2+3.
-        d.file("manifest.txt", "0.0.1\nfoo"),
-            d.file("transformers.snapshot", "junk")])]).create();
-
-    var process = pubRun(args: ['myapp']);
-    process.stdout.expect("Goodbye!");
-    process.shouldExit();
-
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                ".pub/transformers",
-                [
-                    d.file("manifest.txt", "0.1.2+3\nfoo"),
-                    d.matcherFile("transformers.snapshot", isNot(isEmpty))])]).validate();
-  });
-
-  integration("recaches if the transformers change", () {
-    setUp();
-
-    var process = pubRun(args: ['myapp']);
-    process.stdout.expect("Goodbye!");
-    process.shouldExit();
-
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                ".pub/transformers",
-                [
-                    d.file("manifest.txt", "0.1.2+3\nfoo"),
-                    d.matcherFile("transformers.snapshot", isNot(isEmpty))])]).validate();
-
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": "1.2.3",
-          "bar": "1.2.3"
-        },
-        "transformers": ["foo", "bar"]
-      }),
-          d.dir("bin", [d.file("myapp.dart", "main() => print('Hello!');")])]).create();
-
-    process = pubRun(args: ['myapp']);
-    process.stdout.expect("See ya!");
-    process.shouldExit();
-
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                ".pub/transformers",
-                [
-                    d.file("manifest.txt", "0.1.2+3\nbar,foo"),
-                    d.matcherFile("transformers.snapshot", isNot(isEmpty))])]).validate();
-  });
-
-  integration("recaches if the transformer version changes", () {
-    setUp();
-
-    var process = pubRun(args: ['myapp']);
-    process.stdout.expect("Goodbye!");
-    process.shouldExit();
-
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                ".pub/transformers",
-                [
-                    d.file("manifest.txt", "0.1.2+3\nfoo"),
-                    d.matcherFile("transformers.snapshot", isNot(isEmpty))])]).validate();
-
-    servePackages((builder) {
-      builder.serve("foo", "2.0.0", deps: {
-        'barback': 'any'
-      },
-          contents: [
-              d.dir(
-                  "lib",
-                  [d.file("transformer.dart", replaceTransformer("Hello", "New"))])]);
-    });
-
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": "any"
-        },
-        "transformers": ["foo"]
-      })]).create();
-
-    pubUpgrade();
-
-    process = pubRun(args: ['myapp']);
-    process.stdout.expect("New!");
-    process.shouldExit();
-
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                ".pub/transformers",
-                [
-                    d.file("manifest.txt", "0.1.2+3\nfoo"),
-                    d.matcherFile("transformers.snapshot", isNot(isEmpty))])]).validate();
-  });
-
-  integration("recaches if a transitive dependency version changes", () {
-    servePackages((builder) {
-      builder.serveRepoPackage('barback');
-
-      builder.serve("foo", "1.2.3", deps: {
-        'barback': 'any',
-        'bar': 'any'
-      },
-          contents: [
-              d.dir("lib", [d.file("transformer.dart", REPLACE_FROM_LIBRARY_TRANSFORMER)])]);
-
-      builder.serve(
-          "bar",
-          "1.2.3",
-          contents: [
-              d.dir("lib", [d.file("bar.dart", "final replacement = 'Goodbye';")])]);
-    });
-
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": "1.2.3"
-        },
-        "transformers": ["foo"]
-      }),
-          d.dir("bin", [d.file("myapp.dart", "main() => print('Hello!');")])]).create();
-
-    pubGet();
-
-    var process = pubRun(args: ['myapp']);
-    process.stdout.expect("Goodbye!");
-    process.shouldExit();
-
-    servePackages((builder) {
-      builder.serve(
-          "bar",
-          "2.0.0",
-          contents: [
-              d.dir("lib", [d.file("bar.dart", "final replacement = 'See ya';")])]);
-    });
-
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": "any"
-        },
-        "transformers": ["foo"]
-      })]).create();
-
-    pubUpgrade();
-
-    process = pubRun(args: ['myapp']);
-    process.stdout.expect("See ya!");
-    process.shouldExit();
-  });
-
-  // Issue 21298.
-  integration("doesn't recache when a transformer is removed", () {
-    setUp();
-
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": "1.2.3",
-          "bar": "1.2.3"
-        },
-        "transformers": ["foo", "bar"]
-      }),
-          d.dir("bin", [d.file("myapp.dart", "main() => print('Hello!');")])]).create();
-
-    var process = pubRun(args: ['myapp']);
-    process.stdout.expect("See ya!");
-    process.shouldExit();
-
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": "1.2.3",
-          // Add a new dependency to trigger another "pub get". This works
-          // around issue 20498.
-          "baz": "1.2.3"
-        },
-        "transformers": ["foo"]
-      }),
-          d.dir("bin", [d.file("myapp.dart", "main() => print('Hello!');")])]).create();
-
-    process = pubRun(args: ['myapp']);
-    process.stdout.expect(
-        "Your pubspec has changed, so we need to update your lockfile:");
-    process.stdout.expect(consumeThrough("Goodbye!"));
-    process.shouldExit();
-
-    // "bar" should still be in the manifest, since there's no reason to
-    // recompile the cache.
-    d.dir(
-        appPath,
-        [
-            d.dir(
-                ".pub/transformers",
-                [
-                    d.file("manifest.txt", "0.1.2+3\nbar,foo"),
-                    d.matcherFile("transformers.snapshot", isNot(isEmpty))])]).validate();
-  });
-}
-
-String replaceTransformer(String input, String output) {
-  return """
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-
-class ReplaceTransformer extends Transformer {
-  ReplaceTransformer.asPlugin();
-
-  String get allowedExtensions => '.dart';
-
-  Future apply(Transform transform) {
-    return transform.primaryInput.readAsString().then((contents) {
-      transform.addOutput(new Asset.fromString(
-          transform.primaryInput.id,
-          contents.replaceAll("$input", "$output")));
-    });
-  }
-}
-""";
-}