Evaluate expression in context of an object

runtime/vm/compiler_test.cc

 // Copyright (c) 2012, 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.
 
 #include "platform/assert.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
+#include "vm/dart_api_impl.h"
 #include "vm/object.h"
 #include "vm/symbols.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
 TEST_CASE(CompileScript) {
   const char* kScriptChars =
       "class A {\n"
       "  static foo() { return 42; }\n"
@@ skipping 38 matching lines @@
 
   String& function_moo_name = String::Handle(String::New("moo"));
   Function& function_moo =
       Function::Handle(cls.LookupStaticFunction(function_moo_name));
   EXPECT(!function_moo.IsNull());
 
   EXPECT(CompilerTest::TestCompileFunction(function_moo));
   EXPECT(function_moo.HasCode());
 }
 
+
+TEST_CASE(EvalExpression) {
+  const char* kScriptChars =
+      "int ten = 2 * 5;              \n"
+      "get dot => '.';               \n"
+      "class A {                     \n"
+      "  var apa = 'Herr Nilsson';   \n"
+      "  calc(x) => '${x*ten}';      \n"
+      "}                             \n"
+      "makeObj() => new A();         \n";
+
+  Dart_Handle lib = TestCase::LoadTestScript(kScriptChars, NULL);
+  Dart_Handle obj_handle =
+      Dart_Invoke(lib, Dart_NewStringFromCString("makeObj"), 0,  NULL);
+  EXPECT(!Dart_IsNull(obj_handle));
+  EXPECT(!Dart_IsError(obj_handle));
+  const Object& obj = Object::Handle(Api::UnwrapHandle(obj_handle));
+  EXPECT(!obj.IsNull());
+  EXPECT(obj.IsInstance());
+
+  String& expr_text = String::Handle();
+  expr_text = String::New("apa + ' ${calc(10)}' + dot");
+  Object& val = Object::Handle();
+  val = Instance::Cast(obj).Evaluate(expr_text);
+  EXPECT(!val.IsNull());
+  EXPECT(!val.IsError());
+  EXPECT(val.IsString());
+  EXPECT_STREQ("Herr Nilsson 100.", val.ToCString());
+}
+
 }  // namespace dart