Create test isolates using a snapshot, this ensures that we do not depend

runtime/vm/unit_test.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_UNIT_TEST_H_
 #define VM_UNIT_TEST_H_
 
 #include "include/dart_api.h"
 
 #include "vm/ast.h"
@@ skipping 170 matching lines @@
 
 
 namespace dart {
 
 // Forward declarations.
 class Assembler;
 class CodeGenerator;
 class VirtualMemory;
 
 
+// snapshot_buffer points to a snapshot if we link in a snapshot otherwise
+// it is initialized to NULL.
+namespace bin {
+extern const uint8_t* snapshot_buffer;
+}
+
+
 class TestCaseBase {
  public:
   explicit TestCaseBase(const char* name);
   virtual ~TestCaseBase() { }
 
   const char* name() const { return name_; }
 
   virtual void Run() = 0;
   void RunTest();
 
@@ skipping 17 matching lines @@
   TestCase(RunEntry* run, const char* name) : TestCaseBase(name), run_(run) { }
 
   static Dart_Handle LoadTestScript(const char* script,
                                     Dart_NativeEntryResolver resolver);
   static Dart_Handle lib();
   static const char* url() { return "dart:test-lib"; }
   static Dart_Isolate CreateTestIsolateFromSnapshot(uint8_t* buffer) {
     return CreateIsolate(buffer);
   }
   static Dart_Isolate CreateTestIsolate() {
-    return CreateIsolate(NULL);
+    return CreateIsolate(bin::snapshot_buffer);
   }
   static Dart_Handle library_handler(Dart_LibraryTag tag,
                                      Dart_Handle library,
                                      Dart_Handle url);
 
   virtual void Run();
 
  private:
-  static Dart_Isolate CreateIsolate(uint8_t* buffer) {
+  static Dart_Isolate CreateIsolate(const uint8_t* buffer) {
     char* err;
     Dart_Isolate isolate = Dart_CreateIsolate(NULL, NULL, buffer, NULL, &err);
     if (isolate == NULL) {
       OS::Print("Creation of isolate failed '%s'\n", err);
       free(err);
     }
     EXPECT(isolate != NULL);
     return isolate;
   }
 
@@ skipping 127 matching lines @@
       }                                                                        \
     } else {                                                                   \
       dart::Expect(__FILE__, __LINE__).Fail("expected True, but was '%s'\n",   \
           #handle);                                                            \
     }                                                                          \
   } while (0)
 
 }  // namespace dart
 
 #endif  // VM_UNIT_TEST_H_