Implement spawnFunction from the new isolate api.

runtime/vm/object_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/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 585 matching lines @@
     EXPECT(!str16.IsOneByteString());
     EXPECT(str16.IsTwoByteString());
     EXPECT(!str16.IsFourByteString());
     EXPECT_EQ(0x0000, str16.CharAt(0));
     EXPECT_EQ(0x7FFF, str16.CharAt(1));
     EXPECT_EQ(0xFFFF, str16.CharAt(2));
   }
 }
 
 
+TEST_CASE(StringFormat) {
+  const char* hello_str = "Hello World!";
+  int32_t hello_len = strlen(hello_str);
+  const String& str =
+      String::Handle(String::NewFormatted("Hello %s!", "World"));
+  EXPECT(str.IsInstance());
+  EXPECT(str.IsString());
+  EXPECT(str.IsOneByteString());
+  EXPECT(!str.IsTwoByteString());
+  EXPECT(!str.IsFourByteString());
+  EXPECT(!str.IsNumber());
+  EXPECT(str.Equals(hello_str));
+}
+
+
 TEST_CASE(StringConcat) {
   // Create strings from concatenated 1-byte empty strings.
   {
     const String& empty1 = String::Handle(String::New(""));
     EXPECT(empty1.IsOneByteString());
     EXPECT_EQ(0, empty1.Length());
 
     const String& empty2 = String::Handle(String::New(""));
     EXPECT(empty2.IsOneByteString());
     EXPECT_EQ(0, empty2.Length());
@@ skipping 2169 matching lines @@
   EXPECT_EQ(2, test_classes.length());
   EXPECT_EQ(smi_class.raw(), test_classes[0]->raw());
   EXPECT_EQ(smi_class.raw(), test_classes[1]->raw());
   EXPECT_EQ(target1.raw(), test_target.raw());
 }
 
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart