First cut at _spawnUri rpc in the vm service.

runtime/observatory/tests/service/dev_fs_spawn_test.dart

+// Copyright (c) 2016, 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 'dart:async';
+import 'dart:convert';
+import 'package:observatory/service_io.dart';
+import 'package:unittest/unittest.dart';
+import 'service_test_common.dart';
+import 'test_helper.dart';
+
+import 'dart:io';  // remove
+
+var tests = [
+  (VM vm) async {
+    // Create a new fs.
+    var fsName = 'scratch';
+    var result = await vm.invokeRpcNoUpgrade('_createDevFS', {
+        'fsName': fsName,
+      });
+    expect(result['type'], equals('FileSystem'));
+    expect(result['name'], equals('scratch'));
+    expect(result['uri'], new isInstanceOf<String>());
+    var fsUri = result['uri'];
+
+    // Spawn a script with a bad uri and make sure that the error is
+    // delivered asynchronously.
+    Completer completer = new Completer();
+    var sub;
+    sub = await vm.listenEventStream(
+      VM.kIsolateStream,
+      (ServiceEvent event) {
+        if (event.kind == ServiceEvent.kIsolateSpawn) {
+          expect(event.spawnToken, equals('someSpawnToken'));
+          expect(event.spawnError, startsWith(
+              'IsolateSpawnException: Unable to spawn isolate: '));
+          expect(event.isolate, isNull);
+          completer.complete();
+          sub.cancel();
+        }
+      });
+
+    result = await vm.invokeRpcNoUpgrade('_spawnUri', {
+        'token': 'someSpawnToken',
+        'uri': '${fsUri}doesnotexist.dart',
+    });
+    expect(result['type'], equals('Success'));
+    await completer.future;
+
+    // Delete the fs.
+    result = await vm.invokeRpcNoUpgrade('_deleteDevFS', {
+        'fsName': fsName,
+    });
+    expect(result['type'], equals('Success'));
+  },
+
+  (VM vm) async {
+    // Create a new fs.
+    var fsName = 'scratch';
+    var result = await vm.invokeRpcNoUpgrade('_createDevFS', {
+        'fsName': fsName,
+      });
+    expect(result['type'], equals('FileSystem'));
+    expect(result['name'], equals('scratch'));
+    expect(result['uri'], new isInstanceOf<String>());
+    var fsUri = result['uri'];
+
+    var filePaths = [
+        'devfs_file0.dart',
+        'devfs_file1.dart',
+        'devfs_file2.dart'
+    ];
+    var scripts = [
+'''
+import 'dart:developer';
+proofOfLife() => 'I live!';
+main() {
+  print('HELLO WORLD 1');
+  debugger();
+}
+''',
+'''
+import 'dart:developer';
+var globalArgs;
+proofOfLife() => 'I live, \${globalArgs}!';
+main(args) {
+  globalArgs = args;
+  print('HELLO WORLD 2');
+  debugger();
+}
+''',
+'''
+import 'dart:developer';
+var globalArgs;
+var globalMsg;
+proofOfLife() => 'I live, \${globalArgs}, \${globalMsg}!';
+main(args, msg) {
+  globalArgs = args;
+  globalMsg = msg;
+  print('HELLO WORLD 3');
+  debugger();
+}
+''',
+    ];
+
+    // Write three scripts to the fs.
+    for (int i = 0; i < 3; i++) {
+      var fileContents = BASE64.encode(UTF8.encode(scripts[i]));
+      result = await vm.invokeRpcNoUpgrade('_writeDevFSFile', {
+        'fsName': fsName,
+        'path': filePaths[i],
+        'fileContents': fileContents
+      });
+      expect(result['type'], equals('Success'));
+    }
+
+    // Spawn the script with no arguments or message and make sure
+    // that we are notified.
+    Completer completer = new Completer();
+    var sub;
+    sub = await vm.listenEventStream(
+      VM.kIsolateStream,
+      (ServiceEvent event) {
+        if (event.kind == ServiceEvent.kIsolateSpawn) {
+          expect(event.spawnToken, equals('mySpawnToken0'));
+          expect(event.isolate, isNotNull);
+          expect(event.isolate.name, equals('devfs_file0.dart\$main'));
+          completer.complete(event.isolate);
+          sub.cancel();
+        }
+      });
+    result = await vm.invokeRpcNoUpgrade('_spawnUri', {
+        'token': 'mySpawnToken0',
+        'uri': '${fsUri}${filePaths[0]}',
+    });
+    expect(result['type'], equals('Success'));
+    var spawnedIsolate = await completer.future;
+
+    // Wait for the spawned isolate to hit a breakpoint.
+    await spawnedIsolate.load();
+    await hasStoppedAtBreakpoint(spawnedIsolate);
+
+    // Make sure that we are running code from the spawned isolate.
+    result = await spawnedIsolate.rootLibrary.evaluate('proofOfLife()');
+    expect(result.type, equals('Instance'));
+    expect(result.kind, equals('String'));
+    expect(result.valueAsString, equals('I live!'));
+
+    // Spawn the script with arguments.
+    completer = new Completer();
+    sub = await vm.listenEventStream(
+      VM.kIsolateStream,
+      (ServiceEvent event) {
+        if (event.kind == ServiceEvent.kIsolateSpawn) {
+          expect(event.spawnToken, equals('mySpawnToken1'));
+          expect(event.isolate, isNotNull);
+          expect(event.isolate.name, equals('devfs_file1.dart\$main'));
+          completer.complete(event.isolate);
+          sub.cancel();
+        }
+      });
+    result = await vm.invokeRpcNoUpgrade('_spawnUri', {
+        'token': 'mySpawnToken1',
+        'uri': '${fsUri}${filePaths[1]}',
+        'args': ['one', 'two', 'three']
+    });
+    expect(result['type'], equals('Success'));
+    spawnedIsolate = await completer.future;
+
+    // Wait for the spawned isolate to hit a breakpoint.
+    await spawnedIsolate.load();
+    await hasStoppedAtBreakpoint(spawnedIsolate);
+
+    // Make sure that we are running code from the spawned isolate.
+    result = await spawnedIsolate.rootLibrary.evaluate('proofOfLife()');
+    expect(result.type, equals('Instance'));
+    expect(result.kind, equals('String'));
+    expect(result.valueAsString, equals('I live, [one, two, three]!'));
+
+    // Spawn the script with arguments and message
+    completer = new Completer();
+    sub = await vm.listenEventStream(
+      VM.kIsolateStream,
+      (ServiceEvent event) {
+        if (event.kind == ServiceEvent.kIsolateSpawn) {
+          expect(event.spawnToken, equals('mySpawnToken2'));
+          expect(event.isolate, isNotNull);
+          expect(event.isolate.name, equals('devfs_file2.dart\$main'));
+          completer.complete(event.isolate);
+          sub.cancel();
+        }
+      });
+    result = await vm.invokeRpcNoUpgrade('_spawnUri', {
+        'token': 'mySpawnToken2',
+        'uri': '${fsUri}${filePaths[2]}',
+        'args': ['A', 'B', 'C'],
+        'message': 'test'
+    });
+    expect(result['type'], equals('Success'));
+    spawnedIsolate = await completer.future;
+
+    // Wait for the spawned isolate to hit a breakpoint.
+    await spawnedIsolate.load();
+    await hasStoppedAtBreakpoint(spawnedIsolate);
+
+    // Make sure that we are running code from the spawned isolate.
+    result = await spawnedIsolate.rootLibrary.evaluate('proofOfLife()');
+    expect(result.type, equals('Instance'));
+    expect(result.kind, equals('String'));
+    expect(result.valueAsString, equals('I live, [A, B, C], test!'));
+
+    // Delete the fs.
+    result = await vm.invokeRpcNoUpgrade('_deleteDevFS', {
+        'fsName': fsName,
+    });
+    expect(result['type'], equals('Success'));
+  },
+];
+
+main(args) async => runVMTests(args, tests);