Reapply "Tweak public APIs and use them in patch_sdk, dart2js, and kernel-service.""

pkg/front_end/test/summary_generator_test.dart

+// Copyright (c) 2017, 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 'package:front_end/front_end.dart';
+import 'package:front_end/src/testing/compiler_common.dart';
+import 'package:kernel/ast.dart';
+import 'package:kernel/kernel.dart';
+
+import 'package:test/test.dart';
+
+main() {
+  test('summary has no source-info by default', () async {
+    var summary = await summarize(['a.dart'], allSources);
+    var program = loadProgramFromBytes(summary);
+
+    // Note: the kernel representation always has an empty '' key in the map,
+    // but otherwise no other data is included here.
+    expect(program.uriToSource.keys.single, '');
+  });
+
+  test('summary includes declarations, but no method bodies', () async {
+    var summary = await summarize(['a.dart'], allSources);
+    var program = loadProgramFromBytes(summary);
+    var aLib = findLibrary(program, 'a.dart');
+    expect(aLib.importUri.path, '/a/b/c/a.dart');
+    var classA = aLib.classes.first;
+    expect(classA.name, 'A');
+    var fooMethod = classA.procedures.first;
+    expect(fooMethod.name.name, 'foo');
+    expect(fooMethod.function.body is EmptyStatement, isTrue);
+  });
+
+  test('summarized libraries are not marked external', () async {
+    var summary = await summarize(['a.dart'], allSources);
+    var program = loadProgramFromBytes(summary);
+    var aLib = findLibrary(program, 'a.dart');
+    expect(aLib.importUri.path, '/a/b/c/a.dart');
+    expect(aLib.isExternal, isFalse);
+  });
+
+  test('sdk dependencies are marked external', () async {
+    // Note: by default this test is loading the SDK from summaries.
+    var summary = await summarize(['a.dart'], allSources);
+    var program = loadProgramFromBytes(summary);
+    var coreLib = findLibrary(program, 'core');
+    expect(coreLib.isExternal, isTrue);
+  });
+
+  test('non-sdk dependencies are marked external', () async {
+    var summaryA = await summarize(['a.dart'], allSources);
+    var sourcesWithA = new Map.from(allSources);
+    sourcesWithA['a.dill'] = summaryA;
+    var summaryB =
+        await summarize(['b.dart'], sourcesWithA, inputSummaries: ['a.dill']);
+
+    var program = loadProgramFromBytes(summaryB);
+    var aLib = findLibrary(program, 'a.dart');
+    var bLib = findLibrary(program, 'b.dart');
+    expect(aLib.isExternal, isTrue);
+    expect(bLib.isExternal, isFalse);
+  });
+
+  test('dependencies can be combined without conflict', () async {
+    var summaryA = await summarize(['a.dart'], allSources);
+    var sourcesWithA = new Map.from(allSources);
+    sourcesWithA['a.dill'] = summaryA;
+
+    var summaryBC = await summarize(['b.dart', 'c.dart'], sourcesWithA,
+        inputSummaries: ['a.dill']);
+
+    var sourcesWithABC = new Map.from(sourcesWithA);
+    sourcesWithABC['bc.dill'] = summaryBC;
+
+    // Note: a is loaded first, bc.dill have a.dart as an external reference so
+    // we want to ensure loading them here will not create a problem.
+    var summaryD = await summarize(['d.dart'], sourcesWithABC,
+        inputSummaries: ['a.dill', 'bc.dill']);
+
+    checkDSummary(summaryD);
+  });
+
+  test('dependencies can be combined in any order', () async {
+    var summaryA = await summarize(['a.dart'], allSources);
+    var sourcesWithA = new Map.from(allSources);
+    sourcesWithA['a.dill'] = summaryA;
+
+    var summaryBC = await summarize(['b.dart', 'c.dart'], sourcesWithA,
+        inputSummaries: ['a.dill']);
+
+    var sourcesWithABC = new Map.from(sourcesWithA);
+    sourcesWithABC['bc.dill'] = summaryBC;
+
+    // Note: unlinke the previous test now bc.dill is loaded first and contains
+    // an external definition of library a.dart. Using this order also works
+    // because we share a CanonicalName root to resolve names across multiple
+    // dill files and because of how the kernel loader merges definitions.
+    var summaryD = await summarize(['d.dart'], sourcesWithABC,
+        inputSummaries: ['bc.dill', 'a.dill']);
+    checkDSummary(summaryD);
+  });
+
+  test('summarization by default is hermetic', () async {
+    var errors = [];
+    var options = new CompilerOptions()..onError = (e) => errors.add(e);
+    await summarize(['b.dart'], allSources, options: options);
+    expect(errors.first.toString(), contains('Invalid access'));
+    errors.clear();
+
+    await summarize(['a.dart', 'b.dart'], allSources, options: options);
+    expect(errors, isEmpty);
+  });
+
+  // TODO(sigmund): test trimDependencies when it is part of the public API.
+}
+
+var allSources = {
+  'a.dart': 'class A { foo() { print("hi"); } }',
+  'b.dart': 'import "a.dart"; class B extends A {}',
+  'c.dart': 'class C { bar() => 1; }',
+  'd.dart': '''
+      import "a.dart";
+      import "b.dart";
+      import "c.dart";
+      class D extends B with C implements A { }''',
+};
+
+/// Helper function to check that some expectations from the summary of D.
+checkDSummary(List<int> summary) {
+  var program = loadProgramFromBytes(summary);
+  var aLib = findLibrary(program, 'a.dart');
+  var bLib = findLibrary(program, 'b.dart');
+  var cLib = findLibrary(program, 'c.dart');
+  var dLib = findLibrary(program, 'd.dart');
+
+  // All libraries but `d.dart` are marked external.
+  expect(aLib.isExternal, isTrue);
+  expect(bLib.isExternal, isTrue);
+  expect(cLib.isExternal, isTrue);
+  expect(dLib.isExternal, isFalse);
+
+  // The type-hierarchy for A, B, D is visible and correct
+  var aClass = aLib.classes.firstWhere((c) => c.name == 'A');
+  var bClass = bLib.classes.firstWhere((c) => c.name == 'B');
+  expect(bClass.superclass, same(aClass));
+
+  var dClass = dLib.classes.firstWhere((c) => c.name == 'D');
+  expect(dClass.superclass.superclass, same(bClass));
+
+  var dInterface = dClass.implementedTypes.first.classNode;
+  expect(dInterface, same(aClass));
+}