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

sdk/lib/_internal/pub_generated/test/dependency_computer/cycle_test.dart

Index: sdk/lib/_internal/pub_generated/test/dependency_computer/cycle_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/dependency_computer/cycle_test.dart b/sdk/lib/_internal/pub_generated/test/dependency_computer/cycle_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..bfe4cb2402eaae919ef579ad8a7d2dccfeabfde9
--- /dev/null
+++ b/sdk/lib/_internal/pub_generated/test/dependency_computer/cycle_test.dart
@@ -0,0 +1,266 @@
+// Copyright (c) 2014, 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.
+
+library pub_tests;
+
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+import 'utils.dart';
+
+void main() {
+  initConfig();
+
+  integration(
+      "allows a package dependency cycle that's unrelated to " "transformers",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "transformers": ["myapp/first", "myapp/second"]
+      }),
+          d.dir(
+              'lib',
+              [
+                  d.file("first.dart", transformer()),
+                  d.file("second.dart", transformer())])]).create();
+
+    d.dir("foo", [d.libPubspec("foo", "1.0.0", deps: {
+        "bar": {
+          "path": "../bar"
+        }
+      })]).create();
+
+    d.dir("bar", [d.libPubspec("bar", "1.0.0", deps: {
+        "baz": {
+          "path": "../baz"
+        }
+      })]).create();
+
+    d.dir("baz", [d.libPubspec("baz", "1.0.0", deps: {
+        "foo": {
+          "path": "../foo"
+        }
+      })]).create();
+
+    expectDependencies({
+      'myapp/first': [],
+      'myapp/second': ['myapp/first']
+    });
+  });
+
+  integration(
+      "disallows a package dependency cycle that may be related to " "transformers",
+      () {
+    // Two layers of myapp transformers are necessary here because otherwise pub
+    // will figure out that the transformer doesn't import "foo" and thus
+    // doesn't transitively import itself. Import loops are tested below.
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "transformers": ["myapp/first", "myapp/second"]
+      }),
+          d.dir(
+              'lib',
+              [
+                  d.file("first.dart", transformer()),
+                  d.file("second.dart", transformer())])]).create();
+
+    d.dir("foo", [d.libPubspec("foo", "1.0.0", deps: {
+        "bar": {
+          "path": "../bar"
+        }
+      })]).create();
+
+    d.dir("bar", [d.libPubspec("bar", "1.0.0", deps: {
+        "myapp": {
+          "path": "../myapp"
+        }
+      })]).create();
+
+    expectCycleException(
+        [
+            "myapp is transformed by myapp/second",
+            "myapp depends on foo",
+            "foo depends on bar",
+            "bar depends on myapp",
+            "myapp is transformed by myapp/first"]);
+  });
+
+  integration("disallows a transformation dependency cycle", () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "transformers": ["foo"]
+      }), d.dir('lib', [d.file("myapp.dart", transformer())])]).create();
+
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "dependencies": {
+          "bar": {
+            "path": "../bar"
+          }
+        },
+        "transformers": ["bar"]
+      }), d.dir('lib', [d.file("foo.dart", transformer())])]).create();
+
+    d.dir("bar", [d.pubspec({
+        "name": "bar",
+        "dependencies": {
+          "myapp": {
+            "path": "../myapp"
+          }
+        },
+        "transformers": ["myapp"]
+      }), d.dir('lib', [d.file("bar.dart", transformer())])]).create();
+
+    expectCycleException(
+        [
+            "bar is transformed by myapp",
+            "myapp is transformed by foo",
+            "foo is transformed by bar"]);
+  });
+
+  integration(
+      "allows a cross-package import cycle that's unrelated to " "transformers",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "transformers": ["myapp"]
+      }),
+          d.dir(
+              'lib',
+              [d.file("myapp.dart", transformer(['package:foo/foo.dart']))])]).create();
+
+    d.dir("foo", [d.libPubspec("foo", "1.0.0", deps: {
+        "bar": {
+          "path": "../bar"
+        }
+      }),
+          d.dir('lib', [d.file("foo.dart", "import 'package:bar/bar.dart';")])]).create();
+
+    d.dir("bar", [d.libPubspec("bar", "1.0.0", deps: {
+        "baz": {
+          "path": "../baz"
+        }
+      }),
+          d.dir('lib', [d.file("bar.dart", "import 'package:baz/baz.dart';")])]).create();
+
+    d.dir("baz", [d.libPubspec("baz", "1.0.0", deps: {
+        "foo": {
+          "path": "../foo"
+        }
+      }),
+          d.dir('lib', [d.file("baz.dart", "import 'package:foo/foo.dart';")])]).create();
+
+    expectDependencies({
+      'myapp': []
+    });
+  });
+
+  integration(
+      "disallows a cross-package import cycle that's related to " "transformers",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "transformers": ["myapp"]
+      }),
+          d.dir(
+              'lib',
+              [d.file("myapp.dart", transformer(['package:foo/foo.dart']))])]).create();
+
+    d.dir("foo", [d.libPubspec("foo", "1.0.0", deps: {
+        "bar": {
+          "path": "../bar"
+        }
+      }),
+          d.dir('lib', [d.file("foo.dart", "import 'package:bar/bar.dart';")])]).create();
+
+    d.dir("bar", [d.libPubspec("bar", "1.0.0", deps: {
+        "myapp": {
+          "path": "../myapp"
+        }
+      }),
+          d.dir(
+              'lib',
+              [d.file("bar.dart", "import 'package:myapp/myapp.dart';")])]).create();
+
+    expectCycleException(
+        [
+            "myapp is transformed by myapp",
+            "myapp depends on foo",
+            "foo depends on bar",
+            "bar depends on myapp"]);
+  });
+
+  integration(
+      "allows a single-package import cycle that's unrelated to " "transformers",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "transformers": ["myapp"]
+      }),
+          d.dir(
+              'lib',
+              [
+                  d.file("myapp.dart", transformer(['foo.dart'])),
+                  d.file("foo.dart", "import 'bar.dart';"),
+                  d.file("bar.dart", "import 'baz.dart';"),
+                  d.file("baz.dart", "import 'foo.dart';")])]).create();
+
+    expectDependencies({
+      'myapp': []
+    });
+  });
+
+  integration(
+      "allows a single-package import cycle that's related to " "transformers",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "transformers": ["myapp"]
+      }),
+          d.dir(
+              'lib',
+              [
+                  d.file("myapp.dart", transformer(['foo.dart'])),
+                  d.file("foo.dart", "import 'bar.dart';"),
+                  d.file("bar.dart", "import 'myapp.dart';"),])]).create();
+
+    expectDependencies({
+      'myapp': []
+    });
+  });
+}