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

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

Index: sdk/lib/_internal/pub_generated/test/dependency_computer/conservative_dependencies_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/dependency_computer/conservative_dependencies_test.dart b/sdk/lib/_internal/pub_generated/test/dependency_computer/conservative_dependencies_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..2e8cca00c0a9cab297fcb96eb4b83bb18c10a8b9
--- /dev/null
+++ b/sdk/lib/_internal/pub_generated/test/dependency_computer/conservative_dependencies_test.dart
@@ -0,0 +1,522 @@
+// 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 'package:scheduled_test/scheduled_test.dart';
+
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+import 'utils.dart';
+
+void main() {
+  initConfig();
+
+  integration(
+      "reports previous transformers as dependencies if the "
+          "transformer is transformed",
+      () {
+    // The root app just exists so that something is transformed by pkg and qux.
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "version": "1.0.0",
+        "dependencies": {
+          "pkg": {
+            "path": "../pkg"
+          },
+          "qux": {
+            "path": "../qux"
+          }
+        },
+        "transformers": ["pkg", "qux"]
+      })]).create();
+
+    d.dir("pkg", [d.pubspec({
+        "name": "pkg",
+        "version": "1.0.0",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          },
+          "bar": {
+            "path": "../bar"
+          },
+          "baz": {
+            "path": "../baz"
+          },
+        },
+        "transformers": [{
+            "foo": {
+              "\$include": "lib/pkg.dart"
+            }
+          }, {
+            "bar": {
+              "\$exclude": "lib/transformer.dart"
+            }
+          }, "baz"]
+      }),
+          d.dir(
+              "lib",
+              [d.file("pkg.dart", ""), d.file("transformer.dart", transformer())])]).create();
+
+    // Even though foo and bar don't modify pkg/lib/transformer.dart themselves,
+    // it may be modified to import a library that they modify or generate, so
+    // pkg will depend on them.
+    d.dir(
+        "foo",
+        [
+            d.libPubspec("foo", "1.0.0"),
+            d.dir("lib", [d.file("foo.dart", transformer())])]).create();
+
+    d.dir(
+        "bar",
+        [
+            d.libPubspec("bar", "1.0.0"),
+            d.dir("lib", [d.file("bar.dart", transformer())])]).create();
+
+    // baz transforms pkg/lib/transformer.dart, so pkg will obviously
+    // depend on it.
+    d.dir(
+        "baz",
+        [
+            d.libPubspec("baz", "1.0.0"),
+            d.dir("lib", [d.file("baz.dart", transformer())])]).create();
+
+    // qux doesn't transform anything in pkg, so pkg won't depend on it.
+    d.dir(
+        "qux",
+        [
+            d.libPubspec("qux", "1.0.0"),
+            d.dir("lib", [d.file("qux.dart", transformer())])]).create();
+
+    expectDependencies({
+      'pkg': ['foo', 'bar', 'baz'],
+      'foo': [],
+      'bar': [],
+      'baz': [],
+      'qux': []
+    });
+  });
+
+  integration(
+      "reports all transitive package dependencies' transformers as "
+          "dependencies if the transformer is transformed",
+      () {
+    // The root app just exists so that something is transformed by pkg and qux.
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "pkg": {
+            "path": "../pkg"
+          },
+          "qux": {
+            "path": "../qux"
+          }
+        },
+        "transformers": ["pkg"]
+      })]).create();
+
+    d.dir("pkg", [d.pubspec({
+        "name": "pkg",
+        "version": "1.0.0",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          },
+          "baz": {
+            "path": "../baz"
+          }
+        },
+        "transformers": ["baz"]
+      }), d.dir("lib", [d.file("pkg.dart", transformer())])]).create();
+
+    // pkg depends on foo. Even though it's not transformed by foo, its
+    // transformed transformer could import foo, so it has to depend on foo.
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "version": "1.0.0",
+        "dependencies": {
+          "bar": {
+            "path": "../bar"
+          }
+        },
+        "transformers": ["foo"]
+      }), d.dir("lib", [d.file("foo.dart", transformer())])]).create();
+
+    // foo depends on bar, and like pkg's dependency on foo, the transformed
+    // version of foo's transformer could import bar, so foo has to depend on
+    // bar.
+    d.dir("bar", [d.pubspec({
+        "name": "bar",
+        "version": "1.0.0",
+        "transformers": ["bar"]
+      }), d.dir("lib", [d.file("bar.dart", transformer())])]).create();
+
+    /// foo is transformed by baz.
+    d.dir(
+        "baz",
+        [
+            d.libPubspec("baz", "1.0.0"),
+            d.dir("lib", [d.file("baz.dart", transformer())])]).create();
+
+    /// qux is not part of pkg's transitive dependency tree, so pkg shouldn't
+    /// depend on it.
+    d.dir("qux", [d.pubspec({
+        "name": "qux",
+        "version": "1.0.0",
+        "transformers": ["qux"]
+      }), d.dir("lib", [d.file("qux.dart", transformer())])]).create();
+
+    expectDependencies({
+      'pkg': ['foo', 'bar', 'baz'],
+      'foo': [],
+      'bar': [],
+      'baz': [],
+      'qux': []
+    });
+  });
+
+  integration(
+      "reports previous transformers as dependencies if a "
+          "nonexistent local file is imported",
+      () {
+    // The root app just exists so that something is transformed by pkg and bar.
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "pkg": {
+            "path": "../pkg"
+          },
+          "bar": {
+            "path": "../bar"
+          }
+        },
+        "transformers": ["pkg", "bar"]
+      })]).create();
+
+    d.dir("pkg", [d.pubspec({
+        "name": "pkg",
+        "version": "1.0.0",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          },
+          "bar": {
+            "path": "../bar"
+          }
+        },
+        "transformers": [{
+            "foo": {
+              "\$include": "lib/pkg.dart"
+            }
+          }]
+      }),
+          d.dir(
+              "lib",
+              [
+                  d.file("pkg.dart", ""),
+                  d.file("transformer.dart", transformer(["nonexistent.dart"]))])]).create();
+
+    // Since pkg's transformer imports a nonexistent file, we assume that file
+    // was generated by foo's transformer. Thus pkg's transformer depends on
+    // foo's even though the latter doesn't transform the former.
+    d.dir(
+        "foo",
+        [
+            d.libPubspec("foo", "1.0.0"),
+            d.dir("lib", [d.file("foo.dart", transformer())])]).create();
+
+    /// qux is not part of pkg's transitive dependency tree, so pkg shouldn't
+    /// depend on it.
+    d.dir(
+        "bar",
+        [
+            d.libPubspec("bar", "1.0.0"),
+            d.dir("lib", [d.file("bar.dart", transformer())])]).create();
+
+    expectDependencies({
+      'pkg': ['foo'],
+      'foo': [],
+      'bar': []
+    });
+  });
+
+  integration(
+      "reports all that package's dependencies' transformers as "
+          "dependencies if a non-existent file is imported from another package",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          },
+          "qux": {
+            "path": "../qux"
+          }
+        },
+        "transformers": ["myapp"]
+      }),
+          d.dir(
+              "lib",
+              [
+                  d.file(
+                      "myapp.dart",
+                      transformer(["package:foo/nonexistent.dart"]))])]).create();
+
+    // myapp imported a nonexistent file from foo so myapp will depend on every
+    // transformer transitively reachable from foo, since the nonexistent file
+    // could be generated to import anything.
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "version": "1.0.0",
+        "dependencies": {
+          "bar": {
+            "path": "../bar"
+          },
+          "baz": {
+            "path": "../baz"
+          }
+        },
+        "transformers": ["foo"]
+      }), d.dir("lib", [d.file("foo.dart", transformer())])]).create();
+
+    // bar is a dependency of foo so myapp will depend on it.
+    d.dir("bar", [d.pubspec({
+        "name": "bar",
+        "version": "1.0.0",
+        "transformers": ["bar"]
+      }), d.dir("lib", [d.file("bar.dart", transformer())])]).create();
+
+    // baz is a dependency of foo so myapp will depend on it.
+    d.dir("baz", [d.pubspec({
+        "name": "baz",
+        "version": "1.0.0",
+        "transformers": ["baz"]
+      }), d.dir("lib", [d.file("baz.dart", transformer())])]).create();
+
+    // qux is not transitively reachable from foo so myapp won't depend on it.
+    d.dir("qux", [d.pubspec({
+        "name": "qux",
+        "version": "1.0.0",
+        "transformers": ["qux"]
+      }), d.dir("lib", [d.file("qux.dart", transformer())])]).create();
+
+    expectDependencies({
+      'myapp': ['foo', 'bar', 'baz'],
+      'foo': [],
+      'bar': [],
+      'baz': [],
+      'qux': []
+    });
+  });
+
+  integration(
+      "reports all that package's dependencies' transformers as "
+          "dependencies if a non-existent transformer is used from another package",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          },
+          "qux": {
+            "path": "../qux"
+          }
+        },
+        "transformers": ["myapp"]
+      }),
+          d.dir(
+              "lib",
+              [
+                  d.file(
+                      "myapp.dart",
+                      transformer(["package:foo/nonexistent.dart"]))])]).create();
+
+    // myapp imported a nonexistent file from foo so myapp will depend on every
+    // transformer transitively reachable from foo, since the nonexistent file
+    // could be generated to import anything.
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "version": "1.0.0",
+        "dependencies": {
+          "bar": {
+            "path": "../bar"
+          },
+          "baz": {
+            "path": "../baz"
+          }
+        },
+        "transformers": ["bar"]
+      })]).create();
+
+    // bar is a dependency of foo so myapp will depend on it.
+    d.dir(
+        "bar",
+        [
+            d.libPubspec("bar", "1.0.0"),
+            d.dir("lib", [d.file("bar.dart", transformer())])]).create();
+
+    // baz is a dependency of foo so myapp will depend on it.
+    d.dir("baz", [d.pubspec({
+        "name": "baz",
+        "version": "1.0.0",
+        "transformers": ["baz"]
+      }), d.dir("lib", [d.file("baz.dart", transformer())])]).create();
+
+    // qux is not transitively reachable from foo so myapp won't depend on it.
+    d.dir("qux", [d.pubspec({
+        "name": "qux",
+        "version": "1.0.0",
+        "transformers": ["qux"]
+      }), d.dir("lib", [d.file("qux.dart", transformer())])]).create();
+
+    expectDependencies({
+      'myapp': ['bar', 'baz'],
+      'bar': [],
+      'baz': [],
+      'qux': []
+    });
+  });
+
+  test("reports dependencies on transformers in past phases", () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "transformers": ["myapp/first", "myapp/second", "myapp/third"]
+      }),
+          d.dir(
+              "lib",
+              [
+                  d.file("first.dart", transformer()),
+                  d.file("second.dart", transformer()),
+                  d.file("third.dart", transformer())])]).create();
+
+    expectDependencies({
+      'myapp/first': [],
+      'myapp/second': ['myapp/first'],
+      'myapp/third': ['myapp/second', 'myapp/first']
+    });
+  });
+
+  integration(
+      "considers the entrypoint package's dev and override " "dependencies",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "dev_dependencies": {
+          "bar": {
+            "path": "../bar"
+          }
+        },
+        "dependency_overrides": {
+          "baz": {
+            "path": "../baz"
+          }
+        },
+        "transformers": ["foo", "myapp"]
+      }), d.dir("lib", [d.file("myapp.dart", transformer())])]).create();
+
+    // foo transforms myapp's transformer so it could import from bar or baz.
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "version": "1.0.0",
+        "transformers": ["foo"]
+      }), d.dir("lib", [d.file("foo.dart", transformer())])]).create();
+
+    // bar is a dev dependency that myapp could import from, so myapp should
+    // depend on it.
+    d.dir("bar", [d.pubspec({
+        "name": "bar",
+        "version": "1.0.0",
+        "transformers": ["bar"]
+      }), d.dir("lib", [d.file("bar.dart", transformer())])]).create();
+
+    // baz is an override dependency that myapp could import from, so myapp
+    // should depend on it.
+    d.dir("baz", [d.pubspec({
+        "name": "baz",
+        "version": "1.0.0",
+        "transformers": ["baz"]
+      }), d.dir("lib", [d.file("baz.dart", transformer())])]).create();
+
+    expectDependencies({
+      'myapp': ['foo', 'bar', 'baz'],
+      'foo': [],
+      'bar': [],
+      'baz': []
+    });
+  });
+
+  integration(
+      "doesn't consider a non-entrypoint package's dev and override " "dependencies",
+      () {
+    // myapp just exists so that pkg isn't the entrypoint.
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "pkg": {
+            "path": "../pkg"
+          }
+        }
+      })]).create();
+
+    d.dir("pkg", [d.pubspec({
+        "name": "pkg",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        },
+        "dev_dependencies": {
+          "bar": {
+            "path": "../bar"
+          }
+        },
+        "dependency_overrides": {
+          "baz": {
+            "path": "../baz"
+          }
+        },
+        "transformers": ["foo", "pkg"]
+      }), d.dir("lib", [d.file("pkg.dart", transformer())])]).create();
+
+    // foo transforms pkg's transformer so it could theoretcially import from
+    // bar or baz. However, since pkg isn't the entrypoint, it doesn't have
+    // access to them.
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "version": "1.0.0",
+        "transformers": ["foo"]
+      }), d.dir("lib", [d.file("foo.dart", transformer())])]).create();
+
+    // bar is a dev dependency that myapp can't import from, so myapp shouldn't
+    // depend on it.
+    d.dir("bar", [d.pubspec({
+        "name": "bar",
+        "version": "1.0.0",
+        "transformers": ["bar"]
+      }), d.dir("lib", [d.file("bar.dart", transformer())])]).create();
+
+    // baz is a dev dependency that myapp can't import from, so myapp shouldn't
+    // depend on it.
+    d.dir("baz", [d.pubspec({
+        "name": "baz",
+        "version": "1.0.0",
+        "transformers": ["baz"]
+      }), d.dir("lib", [d.file("baz.dart", transformer())])]).create();
+
+    expectDependencies({
+      'pkg': ['foo'],
+      'foo': [],
+      'bar': [],
+      'baz': []
+    });
+  });
+}