Generated front_end/testcases/inference test files from Analyzer tests.

pkg/front_end/testcases/inference/future_then_upwards_3.dart

Index: pkg/front_end/testcases/inference/future_then_upwards_3.dart
diff --git a/pkg/front_end/testcases/inference/future_then_upwards_3.dart b/pkg/front_end/testcases/inference/future_then_upwards_3.dart
new file mode 100644
index 0000000000000000000000000000000000000000..a4f413dbb82a143107f8e0b8946d0f71aa702a05
--- /dev/null
+++ b/pkg/front_end/testcases/inference/future_then_upwards_3.dart
@@ -0,0 +1,28 @@
+// 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.
+
+/*@testedFeatures=inference*/
+library test;
+
+import 'dart:async';
+
+class MyFuture<T> implements Future<T> {
+  MyFuture() {}
+  MyFuture.value(T x) {}
+  dynamic noSuchMethod(invocation);
+  MyFuture<S> then<S>(FutureOr<S> f(T x), {Function onError}) => null;
+}
+
+void main() {
+  var /*@type=Future<double>*/ f =
+      foo().then(/*@returnType=double*/ (/*@type=dynamic*/ _) => 2.3);
+  Future<int> f2 = /*error:INVALID_ASSIGNMENT*/ /*@promotedType=none*/ f;
+
+  // The unnecessary cast is to illustrate that we inferred <double> for
+  // the generic type args, even though we had a return type context.
+  Future<num> f3 = /*info:UNNECESSARY_CAST*/ foo().then(
+      /*@returnType=double*/ (/*@type=dynamic*/ _) => 2.3) as Future<double>;
+}
+
+Future foo() => new Future<int>.value(1);