Per isolate Log with block support

runtime/vm/log_test.cc

+// Copyright (c) 2015, 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/globals.h"
+
+#include "include/dart_debugger_api.h"
+#include "vm/dart_api_impl.h"
+#include "vm/dart_entry.h"
+#include "vm/debugger.h"
+#include "vm/globals.h"
+#include "vm/isolate.h"
+#include "vm/log.h"
+#include "vm/message_handler.h"
+#include "vm/unit_test.h"
+
+namespace dart {
+
+static const char* test_output_;
+static void TestPrinter(const char* print, ...) {
+  test_output_ = print;
+}
+
+class LogTestHelper : public AllStatic {
+ public:
+  static void SetPrinter(Log* log, LogPrinter printer) {
+    ASSERT(log != NULL);
+    ASSERT(printer != NULL);
+    log->printer_ = printer;
+  }
+};
+
+
+TEST_CASE(Log_Macro) {
+  test_output_ = NULL;
+  Isolate* isolate = Isolate::Current();
+  Log* log = isolate->Log();
+  LogTestHelper::SetPrinter(log, TestPrinter);
+
+  ISL_Print("Hello %s", "World");
+  EXPECT_STREQ("Hello World", test_output_);
+  ISL_Print("SingleArgument");
+  EXPECT_STREQ("SingleArgument", test_output_);
+}
+
+
+TEST_CASE(Log_Basic) {
+  test_output_ = NULL;
+  Log* log = new Log(TestPrinter);
+
+  EXPECT_EQ(reinterpret_cast<const char*>(NULL), test_output_);
+  log->Print("Hello %s", "World");
+  EXPECT_STREQ("Hello World", test_output_);
+}
+
+
+TEST_CASE(Log_Block) {
+  test_output_ = NULL;
+  Log* log = new Log(TestPrinter);
+
+  Isolate* isolate = Isolate::Current();
+
+  EXPECT_EQ(reinterpret_cast<const char*>(NULL), test_output_);
+  {
+    LogBlock ba(isolate, log);
+    log->Print("APPLE");
+    EXPECT_EQ(reinterpret_cast<const char*>(NULL), test_output_);
+    {
+      LogBlock ba(isolate, log);
+      log->Print("BANANA");
+      EXPECT_EQ(reinterpret_cast<const char*>(NULL), test_output_);
+    }
+    EXPECT_STREQ("BANANA", test_output_);
+  }
+  EXPECT_STREQ("APPLE", test_output_);
+}
+
+}  // namespace dart