Kernel debugging; service tests

runtime/observatory/tests/service/next_through_is_and_as_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 'test_helper.dart';
+import 'service_test_common.dart';
+
+const int LINE_A = 12;
+const String file = "next_through_is_and_as_test.dart";
+
+code() {
+  var i = 42.42;
+  var hex = 0x42;
+  if (i is int) {
+    print("i is int");
+    int x = i as int;
+    if (x.isEven) {
+      print("it's even even!");
+    } else {
+      print("but it's not even even!");
+    }
+  }
+  if (i is! int) {
+    print("i is not int");
+  }
+  if (hex is int) {
+    print("hex is int");
+    int x = hex as int;
+    if (x.isEven) {
+      print("it's even even!");
+    } else {
+      print("but it's not even even!");
+    }
+  }
+  if (hex is! int) {
+    print("hex is not int");
+  }
+}
+
+List<String> stops = [];
+List<String> expected = [
+  "$file:${LINE_A+0}:9", // on '='
+  "$file:${LINE_A+1}:11", // on '"'
+  "$file:${LINE_A+2}:9", // on 'is'
+  "$file:${LINE_A+11}:9", // on 'is!'
+  "$file:${LINE_A+12}:5", // on call to 'print'
+  "$file:${LINE_A+14}:11", // in 'is'
+  "$file:${LINE_A+15}:5", // on call to 'print'
+  "$file:${LINE_A+16}:17", // on 'as'
+  "$file:${LINE_A+17}:11", // on 'isEven'
+  "$file:${LINE_A+18}:7", // on call to 'print'
+  "$file:${LINE_A+23}:11", // on 'is!'
+  "$file:${LINE_A+26}:1" // on ending '}'
+];
+
+var tests = [
+  hasPausedAtStart,
+  setBreakpointAtLine(LINE_A),
+  runStepThroughProgramRecordingStops(stops),
+  checkRecordedStops(stops, expected)
+];
+
+main(args) {
+  runIsolateTestsSynchronous(args, tests,
+      testeeConcurrent: code, pause_on_start: true, pause_on_exit: true);
+}