Don't send notifications for disposed contexts.

pkg/analysis_server/test/operation/operation_queue_test.dart

Index: pkg/analysis_server/test/operation/operation_queue_test.dart
diff --git a/pkg/analysis_server/test/operation/operation_queue_test.dart b/pkg/analysis_server/test/operation/operation_queue_test.dart
index 09a8afd60033176f04f290973e42a61054fa5d3b..e2ed0f54e1beb65a0ff6c3e67c3101ed540dad50 100644
--- a/pkg/analysis_server/test/operation/operation_queue_test.dart
+++ b/pkg/analysis_server/test/operation/operation_queue_test.dart
@@ -61,6 +61,22 @@ class ServerOperationQueueTest {
     expect(queue.isEmpty, true);
   }
 
+  void test_contextRemoved() {
+    var contextA = new AnalysisContextMock();
+    var contextB = new AnalysisContextMock();
+    var opA1 = new _ContextOperationMock(contextA);
+    var opA2 = new _ContextOperationMock(contextA);
+    var opB1 = new _ContextOperationMock(contextB);
+    var opB2 = new _ContextOperationMock(contextB);
+    queue.add(opA1);
+    queue.add(opB1);
+    queue.add(opA2);
+    queue.add(opB2);
+    queue.contextRemoved(contextA);
+    expect(queue.take(), same(opB1));
+    expect(queue.take(), same(opB2));
+  }
+
   void test_isEmpty_false() {
     var operation = mockOperation(ServerOperationPriority.ANALYSIS);
     queue.add(operation);
@@ -147,6 +163,19 @@ class ServerOperationQueueTest {
   }
 }
 
+class _ContextOperationMock extends TypedMock implements ServerOperation {

[scheglov, 2015/03/06 00:37:23]

We could merge this class with _ServerOperationMock, and make "context" an
optional parameter.

[Paul Berry, 2015/03/06 01:11:09]

Done.

+  final AnalysisContext context;
+
+  _ContextOperationMock(this.context);
+
+  @override
+  ServerOperationPriority get priority {
+    return ServerOperationPriority.ANALYSIS_NOTIFICATION;
+  }
+
+  noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
+}
+
 class _ServerOperationMock extends TypedMock implements ServerOperation {
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }