Roll Observatory packages and add a roll script

packages/stack_trace/test/trace_test.dart

+// Copyright (c) 2013, 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 trace_test;
+
+import 'package:path/path.dart' as path;
+import 'package:stack_trace/stack_trace.dart';
+import 'package:test/test.dart';
+
+String getStackTraceString() {
+  try {
+    throw '';
+  } catch (_, stackTrace) {
+    return stackTrace.toString();
+  }
+}
+
+StackTrace getStackTraceObject() {
+  try {
+    throw '';
+  } catch (_, stackTrace) {
+    return stackTrace;
+  }
+}
+
+Trace getCurrentTrace([int level]) => new Trace.current(level);
+
+Trace nestedGetCurrentTrace(int level) => getCurrentTrace(level);
+
+void main() {
+  // This just shouldn't crash.
+  test('a native stack trace is parseable', () => new Trace.current());
+
+  group('.parse', () {
+    test('.parse parses a VM stack trace correctly', () {
+      var trace = new Trace.parse(
+          '#0      Foo._bar (file:///home/nweiz/code/stuff.dart:42:21)\n'
+          '#1      zip.<anonymous closure>.zap (dart:async/future.dart:0:2)\n'
+          '#2      zip.<anonymous closure>.zap (http://pub.dartlang.org/thing.'
+              'dart:1:100)');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("file:///home/nweiz/code/stuff.dart")));
+      expect(trace.frames[1].uri, equals(Uri.parse("dart:async/future.dart")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.dart")));
+    });
+
+    test('parses a V8 stack trace correctly', () {
+      var trace = new Trace.parse(
+          'Error\n'
+          '    at Foo._bar (http://pub.dartlang.org/stuff.js:42:21)\n'
+          '    at http://pub.dartlang.org/stuff.js:0:2\n'
+          '    at zip.<anonymous>.zap '
+              '(http://pub.dartlang.org/thing.js:1:100)');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+
+      trace = new Trace.parse(
+          "Exception: foo\n"
+          '    at Foo._bar (http://pub.dartlang.org/stuff.js:42:21)\n'
+          '    at http://pub.dartlang.org/stuff.js:0:2\n'
+          '    at zip.<anonymous>.zap '
+              '(http://pub.dartlang.org/thing.js:1:100)');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+
+      trace = new Trace.parse(
+          'Exception: foo\n'
+          '    bar\n'
+          '    at Foo._bar (http://pub.dartlang.org/stuff.js:42:21)\n'
+          '    at http://pub.dartlang.org/stuff.js:0:2\n'
+          '    at zip.<anonymous>.zap '
+              '(http://pub.dartlang.org/thing.js:1:100)');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+    });
+
+    // JavaScriptCore traces are just like V8, except that it doesn't have a
+    // header and it starts with a tab rather than spaces.
+    test('parses a JavaScriptCore stack trace correctly', () {
+      var trace = new Trace.parse(
+          '\tat Foo._bar (http://pub.dartlang.org/stuff.js:42:21)\n'
+          '\tat http://pub.dartlang.org/stuff.js:0:2\n'
+          '\tat zip.<anonymous>.zap '
+              '(http://pub.dartlang.org/thing.js:1:100)');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+
+      trace = new Trace.parse(
+          '\tat Foo._bar (http://pub.dartlang.org/stuff.js:42:21)\n'
+          '\tat \n'
+          '\tat zip.<anonymous>.zap '
+              '(http://pub.dartlang.org/thing.js:1:100)');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+    });
+
+    test('parses a Firefox/Safari stack trace correctly', () {
+      var trace = new Trace.parse(
+          'Foo._bar@http://pub.dartlang.org/stuff.js:42\n'
+          'zip/<@http://pub.dartlang.org/stuff.js:0\n'
+          'zip.zap(12, "@)()/<")@http://pub.dartlang.org/thing.js:1');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+
+      trace = new Trace.parse(
+          'zip/<@http://pub.dartlang.org/stuff.js:0\n'
+          'Foo._bar@http://pub.dartlang.org/stuff.js:42\n'
+          'zip.zap(12, "@)()/<")@http://pub.dartlang.org/thing.js:1');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+
+      trace = new Trace.parse(
+          'zip.zap(12, "@)()/<")@http://pub.dartlang.org/thing.js:1\n'
+          'zip/<@http://pub.dartlang.org/stuff.js:0\n'
+          'Foo._bar@http://pub.dartlang.org/stuff.js:42');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+    });
+
+    test('parses a Firefox/Safari stack trace containing native code correctly',
+        () {
+      var trace = new Trace.parse(
+          'Foo._bar@http://pub.dartlang.org/stuff.js:42\n'
+          'zip/<@http://pub.dartlang.org/stuff.js:0\n'
+          'zip.zap(12, "@)()/<")@http://pub.dartlang.org/thing.js:1\n'
+          '[native code]');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+      expect(trace.frames.length, equals(3));
+    });
+
+    test('parses a Firefox/Safari stack trace without a method name correctly',
+        () {
+      var trace = new Trace.parse(
+          'http://pub.dartlang.org/stuff.js:42\n'
+          'zip/<@http://pub.dartlang.org/stuff.js:0\n'
+          'zip.zap(12, "@)()/<")@http://pub.dartlang.org/thing.js:1');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[0].member, equals('<fn>'));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+    });
+
+    test('parses a Firefox/Safari stack trace with an empty line correctly',
+        () {
+      var trace = new Trace.parse(
+          'Foo._bar@http://pub.dartlang.org/stuff.js:42\n'
+          '\n'
+          'zip/<@http://pub.dartlang.org/stuff.js:0\n'
+          'zip.zap(12, "@)()/<")@http://pub.dartlang.org/thing.js:1');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+    });
+
+    test('parses a Firefox/Safari stack trace with a column number correctly',
+        () {
+      var trace = new Trace.parse(
+          'Foo._bar@http://pub.dartlang.org/stuff.js:42:2\n'
+          'zip/<@http://pub.dartlang.org/stuff.js:0\n'
+          'zip.zap(12, "@)()/<")@http://pub.dartlang.org/thing.js:1');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[0].line, equals(42));
+      expect(trace.frames[0].column, equals(2));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+    });
+
+    test('parses a package:stack_trace stack trace correctly', () {
+      var trace = new Trace.parse(
+          'http://dartlang.org/foo/bar.dart 10:11  Foo.<fn>.bar\n'
+          'http://dartlang.org/foo/baz.dart        Foo.<fn>.bar');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://dartlang.org/foo/bar.dart")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://dartlang.org/foo/baz.dart")));
+    });
+
+    test('parses a package:stack_trace stack chain correctly', () {
+      var trace = new Trace.parse(
+          'http://dartlang.org/foo/bar.dart 10:11  Foo.<fn>.bar\n'
+          'http://dartlang.org/foo/baz.dart        Foo.<fn>.bar\n'
+          '===== asynchronous gap ===========================\n'
+          'http://dartlang.org/foo/bang.dart 10:11  Foo.<fn>.bar\n'
+          'http://dartlang.org/foo/quux.dart        Foo.<fn>.bar');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://dartlang.org/foo/bar.dart")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://dartlang.org/foo/baz.dart")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://dartlang.org/foo/bang.dart")));
+      expect(trace.frames[3].uri,
+          equals(Uri.parse("http://dartlang.org/foo/quux.dart")));
+    });
+
+    test('parses a real package:stack_trace stack trace correctly', () {
+      var traceString = new Trace.current().toString();
+      expect(new Trace.parse(traceString).toString(), equals(traceString));
+    });
+
+    test('parses an empty string correctly', () {
+      var trace = new Trace.parse('');
+      expect(trace.frames, isEmpty);
+      expect(trace.toString(), equals(''));
+    });
+  });
+
+  test('.toString() nicely formats the stack trace', () {
+    var trace = new Trace.parse('''
+#0      Foo._bar (foo/bar.dart:42:21)
+#1      zip.<anonymous closure>.zap (dart:async/future.dart:0:2)
+#2      zip.<anonymous closure>.zap (http://pub.dartlang.org/thing.dart:1:100)
+''');
+
+    expect(trace.toString(), equals('''
+${path.join('foo', 'bar.dart')} 42:21                        Foo._bar
+dart:async/future.dart 0:2                zip.<fn>.zap
+http://pub.dartlang.org/thing.dart 1:100  zip.<fn>.zap
+'''));
+  });
+
+  test('.vmTrace returns a native-style trace', () {
+    var uri = path.toUri(path.absolute('foo'));
+    var trace = new Trace([
+      new Frame(uri, 10, 20, 'Foo.<fn>'),
+      new Frame(Uri.parse('http://dartlang.org/foo.dart'), null, null, 'bar'),
+      new Frame(Uri.parse('dart:async'), 15, null, 'baz'),
+    ]);
+
+    expect(trace.vmTrace.toString(), equals(
+        '#1      Foo.<anonymous closure> ($uri:10:20)\n'
+        '#2      bar (http://dartlang.org/foo.dart:0:0)\n'
+        '#3      baz (dart:async:15:0)\n'));
+  });
+
+  group("folding", () {
+    test('.terse folds core frames together bottom-up', () {
+      var trace = new Trace.parse('''
+#1 top (dart:async/future.dart:0:2)
+#2 bottom (dart:core/uri.dart:1:100)
+#0 notCore (foo.dart:42:21)
+#3 top (dart:io:5:10)
+#4 bottom (dart:async-patch/future.dart:9:11)
+#5 alsoNotCore (bar.dart:10:20)
+''');
+
+      expect(trace.terse.toString(), equals('''
+dart:core       bottom
+foo.dart 42:21  notCore
+dart:async      bottom
+bar.dart 10:20  alsoNotCore
+'''));
+    });
+
+    test('.terse folds empty async frames', () {
+      var trace = new Trace.parse('''
+#0 top (dart:async/future.dart:0:2)
+#1 empty.<<anonymous closure>_async_body> (bar.dart)
+#2 bottom (dart:async-patch/future.dart:9:11)
+#3 notCore (foo.dart:42:21)
+''');
+
+      expect(trace.terse.toString(), equals('''
+dart:async      bottom
+foo.dart 42:21  notCore
+'''));
+    });
+
+    test('.terse removes the bottom-most async frame', () {
+      var trace = new Trace.parse('''
+#0 notCore (foo.dart:42:21)
+#1 top (dart:async/future.dart:0:2)
+#2 bottom (dart:core/uri.dart:1:100)
+#3 top (dart:io:5:10)
+#4 bottom (dart:async-patch/future.dart:9:11)
+''');
+
+      expect(trace.terse.toString(), equals('''
+foo.dart 42:21  notCore
+'''));
+    });
+
+    test(".terse won't make a trace empty", () {
+      var trace = new Trace.parse('''
+#1 top (dart:async/future.dart:0:2)
+#2 bottom (dart:core/uri.dart:1:100)
+''');
+
+      expect(trace.terse.toString(), equals('''
+dart:core  bottom
+'''));
+    });
+
+    test(".terse won't panic on an empty trace", () {
+      expect(new Trace.parse("").terse.toString(), equals(""));
+    });
+
+    test('.foldFrames folds frames together bottom-up', () {
+      var trace = new Trace.parse('''
+#0 notFoo (foo.dart:42:21)
+#1 fooTop (bar.dart:0:2)
+#2 fooBottom (foo.dart:1:100)
+#3 alsoNotFoo (bar.dart:10:20)
+#4 fooTop (dart:io/socket.dart:5:10)
+#5 fooBottom (dart:async-patch/future.dart:9:11)
+''');
+
+      var folded = trace.foldFrames((frame) => frame.member.startsWith('foo'));
+      expect(folded.toString(), equals('''
+foo.dart 42:21                     notFoo
+foo.dart 1:100                     fooBottom
+bar.dart 10:20                     alsoNotFoo
+dart:async-patch/future.dart 9:11  fooBottom
+'''));
+    });
+
+    test('.foldFrames with terse: true folds core frames as well', () {
+      var trace = new Trace.parse('''
+#0 notFoo (foo.dart:42:21)
+#1 fooTop (bar.dart:0:2)
+#2 coreBottom (dart:async/future.dart:0:2)
+#3 alsoNotFoo (bar.dart:10:20)
+#4 fooTop (foo.dart:9:11)
+#5 coreBottom (dart:async-patch/future.dart:9:11)
+''');
+
+      var folded = trace.foldFrames((frame) => frame.member.startsWith('foo'),
+          terse: true);
+      expect(folded.toString(), equals('''
+foo.dart 42:21  notFoo
+dart:async      coreBottom
+bar.dart 10:20  alsoNotFoo
+'''));
+    });
+
+    test('.foldFrames with terse: true shortens folded frames', () {
+      var trace = new Trace.parse('''
+#0 notFoo (foo.dart:42:21)
+#1 fooTop (bar.dart:0:2)
+#2 fooBottom (package:foo/bar.dart:0:2)
+#3 alsoNotFoo (bar.dart:10:20)
+#4 fooTop (foo.dart:9:11)
+#5 fooBottom (foo/bar.dart:9:11)
+''');
+
+      var folded = trace.foldFrames((frame) => frame.member.startsWith('foo'),
+          terse: true);
+      expect(folded.toString(), equals('''
+foo.dart 42:21  notFoo
+package:foo     fooBottom
+bar.dart 10:20  alsoNotFoo
+foo             fooBottom
+'''));
+    });
+
+    test('.foldFrames will never fold unparsed frames', () {
+      var trace = new Trace.parse(r'''
+.g"cs$#:b";a#>sw{*{ul$"$xqwr`p
+%+j-?uppx<([j@#nu{{>*+$%x-={`{
+!e($b{nj)zs?cgr%!;bmw.+$j+pfj~
+''');
+
+      expect(trace.foldFrames((frame) => true).toString(), equals(r'''
+.g"cs$#:b";a#>sw{*{ul$"$xqwr`p
+%+j-?uppx<([j@#nu{{>*+$%x-={`{
+!e($b{nj)zs?cgr%!;bmw.+$j+pfj~
+'''));
+    });
+  });
+}