Support stacktrace and objecthistogram service commands

runtime/vm/json_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 "platform/json.h"
 #include "vm/json_stream.h"
 #include "vm/unit_test.h"
 
 namespace dart {
@@ skipping 123 matching lines @@
 
   js.Clear();
   js.PrintValueBool(true);
   EXPECT_STREQ("true", tb.buf());
 
   js.Clear();
   js.PrintValueBool(false);
   EXPECT_STREQ("false", tb.buf());
 
   js.Clear();
-  js.PrintValue((intptr_t)4);
+  js.PrintValue(static_cast<intptr_t>(4));
   EXPECT_STREQ("4", tb.buf());
 
   js.Clear();
   js.PrintValue(1.0);
   EXPECT_STREQ("1.000000", tb.buf());
 
   js.Clear();
   js.PrintValue("hello");
   EXPECT_STREQ("\"hello\"", tb.buf());
 }
@@ skipping 57 matching lines @@
   js.PrintValue((intptr_t)4);
   js.CloseArray();
   js.OpenArray();
   js.PrintValueBool(false);
   js.CloseArray();
   js.CloseArray();
   EXPECT_STREQ("[[4],[false]]", tb.buf());
 }
 
 
+TEST_CASE(JSON_JSONStream_Printf) {
+  TextBuffer tb(256);
+  JSONStream js(&tb);
+  js.OpenArray();
+  js.PrintfValue("%d %s", 2, "hello");
+  js.CloseArray();
+  EXPECT_STREQ("[\"2 hello\"]", tb.buf());
+}
+
+
+TEST_CASE(JSON_JSONStream_ObjectPrintf) {
+  TextBuffer tb(256);
+  JSONStream js(&tb);
+  js.OpenObject();
+  js.PrintfProperty("key", "%d %s", 2, "hello");
+  js.CloseObject();
+  EXPECT_STREQ("{\"key\":\"2 hello\"}", tb.buf());
+}
+
+
 TEST_CASE(JSON_JSONStream_DartObject) {
   TextBuffer tb(256);
   JSONStream js(&tb);
   js.OpenArray();
   js.PrintValue(Object::Handle(Object::null()));
   js.OpenObject();
   js.PrintProperty("object_key", Object::Handle(Object::null()));
   js.CloseArray();
   EXPECT_STREQ("[{\"type\":\"null\"},{\"object_key\":{\"type\":\"null\"}]",
                tb.buf());
 }
 
 
 }  // namespace dart