sdk/lib/_internal/pub/test/transformers_needed_by_transformers/cycle_test.dart

// 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("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': []});
  });
}