Add support to trace warnings in TraceBuffer.

runtime/vm/exceptions_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 "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/unit_test.h"
 
 namespace dart {
@@ skipping 114 matching lines @@
       "testMain() {\n"
       "  UnhandledExceptions.equals(2, Second.method1(1));\n"
       "  UnhandledExceptions.equals(3, Second.method3(1));\n"
       "}";
   Dart_Handle lib = TestCase::LoadTestScript(
       kScriptChars,
       reinterpret_cast<Dart_NativeEntryResolver>(native_lookup));
   EXPECT_VALID(Dart_Invoke(lib, NewString("testMain"), 0, NULL));
 }
 
+
+TEST_CASE(TraceJSWarning) {
+  Isolate* isolate = Isolate::Current();
+  TraceBuffer::Init(isolate, 3);
+  TraceBuffer* trace_buffer = isolate->trace_buffer();
+  const String& url = String::Handle(isolate, String::New("Plug"));
+  const String& source = String::Handle(isolate, String::New("240V"));
+  const Script& script = Script::Handle(isolate,
+      Script::New(url, source, RawScript::kScriptTag));
+  {
+    const intptr_t token_pos = 0;
+    const char* message = "High Voltage";
+    Exceptions::TraceJSWarningF(script, token_pos, "%s", message);
+    {
+      JSONStream js;
+      trace_buffer->PrintToJSONStream(&js);
+      EXPECT_SUBSTRING("{\"type\":\"TraceBuffer\",\"members\":["
+                       "{\"type\":\"TraceBufferEntry\",\"time\":",
+                       js.ToCString());
+      // Skip time.
+      EXPECT_SUBSTRING("\"message\":{\"type\":\"JSCompatibilityWarning\","
+                       "\"script\":{\"type\":\"@Script\",\"id\":"
+                       "\"scripts\\/Plug\",\"name\":\"Plug\",\"user_name\":"
+                       "\"Plug\",\"kind\":\"script\"},\"tokenPos\":0,"
+                       "\"message\":\"High Voltage\"}}]}",
+                       js.ToCString());
+    }
+  }
+  {
+    const intptr_t token_pos = 1;
+    const char* message = "Low Voltage";
+    Exceptions::TraceJSWarningF(script, token_pos, "%s", message);
+  }
+  EXPECT_EQ(2, trace_buffer->Length());
+  EXPECT_STREQ("{\"type\":\"JSCompatibilityWarning\",\"script\":{\"type\":"
+               "\"@Script\",\"id\":\"scripts\\/Plug\",\"name\":\"Plug\","
+               "\"user_name\":\"Plug\",\"kind\":\"script\"},\"tokenPos\":0,"
+               "\"message\":\"High Voltage\"}",
+               trace_buffer->At(0)->message);
+  EXPECT_STREQ("{\"type\":\"JSCompatibilityWarning\",\"script\":{\"type\":"
+               "\"@Script\",\"id\":\"scripts\\/Plug\",\"name\":\"Plug\","
+               "\"user_name\":\"Plug\",\"kind\":\"script\"},\"tokenPos\":1,"
+               "\"message\":\"Low Voltage\"}",
+               trace_buffer->At(1)->message);
+
+  delete trace_buffer;
+}
+
 }  // namespace dart