Add support for analyzing individual URIs.

tests/compiler/dart2js/analyze_dart2js_helpers_test.dart

Index: tests/compiler/dart2js/analyze_dart2js_helpers_test.dart
diff --git a/tests/compiler/dart2js/analyze_dart2js_helpers_test.dart b/tests/compiler/dart2js/analyze_dart2js_helpers_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ac726143b684edde5e2ea9138de1d927ec19433c
--- /dev/null
+++ b/tests/compiler/dart2js/analyze_dart2js_helpers_test.dart
@@ -0,0 +1,235 @@
+// Copyright (c) 2015, 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 dart2js.analyze_helpers.test;
+
+import 'dart:io';
+
+import 'package:async_helper/async_helper.dart';
+import 'package:compiler/compiler_new.dart' show
+    Diagnostic;
+import 'package:compiler/src/apiimpl.dart' show
+    Compiler;
+import 'package:compiler/src/constants/expressions.dart' show
+    ConstructedConstantExpression;
+import 'package:compiler/src/dart_types.dart' show
+    InterfaceType;
+import 'package:compiler/src/diagnostics/source_span.dart' show
+    SourceSpan;
+import 'package:compiler/src/elements/elements.dart';
+import 'package:compiler/src/filenames.dart' show
+    nativeToUriPath;
+import 'package:compiler/src/resolution/semantic_visitor.dart';
+import 'package:compiler/src/resolution/tree_elements.dart' show
+    TreeElements;
+import 'package:compiler/src/source_file_provider.dart' show
+    FormattingDiagnosticHandler;
+import 'package:compiler/src/tree/tree.dart';
+import 'package:compiler/src/universe/universe.dart' show
+    CallStructure;
+import 'package:expect/expect.dart';
+
+import 'memory_compiler.dart';
+
+main(List<String> arguments) {
+  bool verbose = arguments.contains('-v');
+
+  List<String> options = <String>[
+    '--analyze-only',
+    '--analyze-main',
+    '--categories=Client,Server'];
+  if (verbose) {
+    options.add('--verbose');
+  }
+  asyncTest(() async {
+    Compiler compiler = compilerFor(
+        options: options, showDiagnostics: verbose);
+    FormattingDiagnosticHandler diagnostics =
+        new FormattingDiagnosticHandler(compiler.provider);
+    HelperAnalyzer analyzer = new HelperAnalyzer(diagnostics);
+    Directory dir =
+        new Directory.fromUri(Uri.base.resolve('pkg/compiler/lib/'));
+    for (FileSystemEntity entity in dir.listSync(recursive: true)) {
+      if (entity is File && entity.path.endsWith('.dart')) {
+        Uri file = Uri.base.resolve(nativeToUriPath(entity.path));
+        if (verbose) {
+          print('---- analyzing $file ----');
+        }
+        LibraryElement library = await compiler.analyzeUri(file);
+        if (library != null) {
+          library.forEachLocalMember((Element element) {
+            if (element is ClassElement) {
+              element.forEachLocalMember((AstElement member) {
+                analyzer.analyze(member.resolvedAst);
+              });
+            } else if (element is MemberElement) {
+              analyzer.analyze(element.resolvedAst);
+            }
+          });
+        }
+      }
+    }
+    Expect.isTrue(analyzer.errors.isEmpty, "Errors found.");
+  });
+}
+
+class HelperAnalyzer extends TraversalVisitor {
+  final FormattingDiagnosticHandler diagnostics;
+  List<SourceSpan> errors = <SourceSpan>[];
+
+  ResolvedAst resolvedAst;
+
+  @override
+  TreeElements get elements => resolvedAst.elements;
+
+  AnalyzableElement get analyzedElement => resolvedAst.element;
+
+  HelperAnalyzer(this.diagnostics) : super(null);
+
+  @override
+  void apply(Node node, [_]) {
+    node.accept(this);
+  }
+
+  void analyze(ResolvedAst resolvedAst) {
+    if (resolvedAst.node == null) {
+      // Skip synthesized members.
+      return;
+    }
+    this.resolvedAst = resolvedAst;
+    apply(resolvedAst.node);
+    this.resolvedAst = null;
+  }
+
+  bool isHelper(Element element) {
+    Uri uri = element.library.canonicalUri;
+    return uri.path.endsWith('src/helpers/helpers.dart');
+  }
+
+  void checkAccess(Node node, MemberElement element) {
+    if (isHelper(element) && !isHelper(analyzedElement)) {
+      Uri uri = analyzedElement.implementation.sourcePosition.uri;
+      SourceSpan span = new SourceSpan.fromNode(uri, node);
+      diagnostics.report(null, span.uri, span.begin, span.end,
+          "Helper used in production code.",
+          Diagnostic.ERROR);
+      errors.add(span);
+    }
+  }
+
+  @override
+  void visitTopLevelFieldInvoke(
+      Send node,
+      FieldElement field,
+      NodeList arguments,
+      CallStructure callStructure,
+      _) {
+    checkAccess(node, field);
+    apply(arguments);
+  }
+
+  @override
+  void visitTopLevelGetterInvoke(
+      Send node,
+      GetterElement getter,
+      NodeList arguments,
+      CallStructure callStructure,
+      _) {
+    checkAccess(node, getter);
+    apply(arguments);
+  }
+
+  @override
+  void visitTopLevelFunctionInvoke(
+      Send node,
+      MethodElement method,
+      NodeList arguments,
+      CallStructure callStructure,
+      _) {
+    checkAccess(node, method);
+    apply(arguments);
+  }
+
+  @override
+  void visitTopLevelFieldGet(
+      Send node,
+      FieldElement field,
+      _) {
+    checkAccess(node, field);
+  }
+
+  @override
+  void visitTopLevelGetterGet(
+      Send node,
+      GetterElement getter,
+      _) {
+    checkAccess(node, getter);
+  }
+
+  @override
+  void visitTopLevelFunctionGet(
+      Send node,
+      MethodElement method,
+      _) {
+    checkAccess(node, method);
+  }
+
+  @override
+  void visitGenerativeConstructorInvoke(
+      NewExpression node,
+      ConstructorElement constructor,
+      InterfaceType type,
+      NodeList arguments,
+      CallStructure callStructure,
+      _) {
+    checkAccess(node, constructor);
+    apply(arguments);
+  }
+
+  @override
+  void visitRedirectingGenerativeConstructorInvoke(
+      NewExpression node,
+      ConstructorElement constructor,
+      InterfaceType type,
+      NodeList arguments,
+      CallStructure callStructure,
+      _) {
+    checkAccess(node, constructor);
+    apply(arguments);
+  }
+
+  @override
+  void visitFactoryConstructorInvoke(
+      NewExpression node,
+      ConstructorElement constructor,
+      InterfaceType type,
+      NodeList arguments,
+      CallStructure callStructure,
+      _) {
+    checkAccess(node, constructor);
+    apply(arguments);
+  }
+
+  @override
+  void visitRedirectingFactoryConstructorInvoke(
+      NewExpression node,
+      ConstructorElement constructor,
+      InterfaceType type,
+      ConstructorElement effectiveTarget,
+      InterfaceType effectiveTargetType,
+      NodeList arguments,
+      CallStructure callStructure,
+      _) {
+    checkAccess(node, constructor);
+    apply(arguments);
+  }
+
+  @override
+  void visitConstConstructorInvoke(
+      NewExpression node,
+      ConstructedConstantExpression constant,
+      _) {
+    checkAccess(node, constant.target);
+  }
+}