Fixes #461.Conditional expression ambiguities tests added
diff --git a/LanguageFeatures/nnbd/syntax_A08_t01.dart b/LanguageFeatures/nnbd/syntax_A08_t01.dart
new file mode 100644
index 0000000..e93ed93
--- /dev/null
+++ b/LanguageFeatures/nnbd/syntax_A08_t01.dart
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2019, 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.
+ */
+/**
+ * @assertion Conditional expressions inside of braces are ambiguous between
+ * sets and maps. That is, { a as bool ? - 3 : 3 } can be parsed as a set
+ * literal { (a as bool) ? - 3 : 3 } or as a map literal
+ * { (a as bool ?) - 3 : 3 }. Parsers will prefer the former parse over the
+ * latter.
+ *
+ * The same is true for { a is int ? - 3 : 3 }.
+ *
+ * The same is true for { int ? - 3 : 3 } if we allow this.
+ *
+ * @description Check that { a as bool ? - 3 : 3 } is parsed as
+ * { (a as bool) ? - 3 : 3 }
+ * @author sgrekhov@unipro.ru
+ */
+// SharedOptions=--enable-experiment=non-nullable
+import "../../Utils/expect.dart";
+
+main() {
+ dynamic a = true;
+ var v = { a as bool ? - 3 : 3 };
+ Expect.setEquals({-3}, v);
+
+ dynamic a2 = false;
+ var v2 = { a2 as bool ? - 3 : 3 };
+ Expect.setEquals({3}, v2);
+}
diff --git a/LanguageFeatures/nnbd/syntax_A08_t02.dart b/LanguageFeatures/nnbd/syntax_A08_t02.dart
new file mode 100644
index 0000000..33d6fb4
--- /dev/null
+++ b/LanguageFeatures/nnbd/syntax_A08_t02.dart
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2019, 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.
+ */
+/**
+ * @assertion Conditional expressions inside of braces are ambiguous between
+ * sets and maps. That is, { a as bool ? - 3 : 3 } can be parsed as a set
+ * literal { (a as bool) ? - 3 : 3 } or as a map literal
+ * { (a as bool ?) - 3 : 3 }. Parsers will prefer the former parse over the
+ * latter.
+ *
+ * The same is true for { a is int ? - 3 : 3 }.
+ *
+ * The same is true for { int ? - 3 : 3 } if we allow this.
+ *
+ * @description Check that { a is int ? - 3 : 3 } is parsed as
+ * { (a is int) ? - 3 : 3 }
+ * @author sgrekhov@unipro.ru
+ */
+// SharedOptions=--enable-experiment=non-nullable
+import "../../Utils/expect.dart";
+
+main() {
+ var a = 42;
+ var v = { a is int ? - 3 : 3 };
+ Expect.setEquals({-3}, v);
+
+
+ dynamic a2 = 3.14;
+ var v2 = { a2 is int ? - 3 : 3 };
+ Expect.setEquals({3}, v2);
+}
