Add a version of heap snapshots that use only fields and stack frames as roots and only include ins…

runtime/observatory/tests/service/dominator_tree_test.dart

Index: runtime/observatory/tests/service/dominator_tree_test.dart
diff --git a/runtime/observatory/tests/service/dominator_tree_test.dart b/runtime/observatory/tests/service/dominator_tree_test.dart
deleted file mode 100644
index 037fbebcbf6a0811d22caeae53eb976f8d619819..0000000000000000000000000000000000000000
--- a/runtime/observatory/tests/service/dominator_tree_test.dart
+++ /dev/null
@@ -1,88 +0,0 @@
-// 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.
-// VMOptions=--error_on_bad_type --error_on_bad_override
-
-import 'package:observatory/heap_snapshot.dart';
-import 'package:observatory/service_io.dart';
-import 'package:unittest/unittest.dart';
-import 'test_helper.dart';
-
-// small example from [Lenguaer & Tarjan 1979]
-class R { var x; var y; var z; }
-class A { var x; }
-class B { var x; var y; var z; }
-class C { var x; var y; }
-class D { var x; }
-class E { var x; }
-class F { var x; }
-class G { var x; var y; }
-class H { var x; var y; }
-class I { var x; }
-class J { var x; }
-class K { var x; var y; }
-class L { var x; }
-
-var r;
-
-buildGraph() {
-  r = new R();
-  var a = new A();
-  var b = new B();
-  var c = new C();
-  var d = new D();
-  var e = new E();
-  var f = new F();
-  var g = new G();
-  var h = new H();
-  var i = new I();
-  var j = new J();
-  var k = new K();
-  var l = new L();
-
-  r.x = a; r.y = b; r.z = c;
-  a.x = d;
-  b.x = a; b.y = d; b.z = e;
-  c.x = f; c.y = g;
-  d.x = l;
-  e.x = h;
-  f.x = i;
-  g.x = i; g.y = j;
-  h.x = e; h.y = k;
-  i.x = k;
-  j.x = i;
-  k.x = i; k.y = r;
-  l.x = h;
-}
-
-var tests = [
-(Isolate isolate) async {
-  final rootLib = await isolate.rootLibrary.load();
-  final raw = await isolate.fetchHeapSnapshot(false).last;
-  final snapshot = new HeapSnapshot();
-  await snapshot.loadProgress(isolate, raw).last;
-
-  node(String className) {
-    var cls = rootLib.classes.singleWhere((cls) => cls.name == className);
-    return snapshot.graph.vertices.singleWhere((v) => v.vmCid == cls.vmCid);
-  }
-
-  expect(node('I').dominator, equals(node('R')));
-  expect(node('K').dominator, equals(node('R')));
-  expect(node('C').dominator, equals(node('R')));
-  expect(node('H').dominator, equals(node('R')));
-  expect(node('E').dominator, equals(node('R')));
-  expect(node('A').dominator, equals(node('R')));
-  expect(node('D').dominator, equals(node('R')));
-  expect(node('B').dominator, equals(node('R')));
-
-  expect(node('F').dominator, equals(node('C')));
-  expect(node('G').dominator, equals(node('C')));
-  expect(node('J').dominator, equals(node('G')));
-  expect(node('L').dominator, equals(node('D')));
-
-  expect(node('R'), isNotNull);  // The field.
-},
-];
-
-main(args) => runIsolateTests(args, tests, testeeBefore: buildGraph);