First version of the new generators implementation.

test/cctest/interpreter/test-interpreter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/execution.h"
 #include "src/handles.h"
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecode-array-iterator.h"
@@ skipping 4121 matching lines @@
     std::string source(InterpreterTester::SourceForBody(strict_body.c_str()));
     InterpreterTester tester(handles.main_isolate(), source.c_str());
     v8::Local<v8::String> message = tester.CheckThrowsReturnMessage()->Get();
     v8::Local<v8::String> expected_string = v8_str(const_decl[i].second);
     CHECK(
         message->Equals(CcTest::isolate()->GetCurrentContext(), expected_string)
             .FromJust());
   }
 }
 
+TEST(InterpreterGenerators) {
+  bool old_flag = FLAG_ignition_generators;
+  FLAG_ignition_generators = true;
+
+  HandleAndZoneScope handles;
+  i::Isolate* isolate = handles.main_isolate();
+  i::Factory* factory = isolate->factory();
+
+  std::pair<const char*, Handle<Object>> tests[] = {
+      {"function* f() { }; return f().next().value",
+       factory->undefined_value()},
+      {"function* f() { yield 42 }; return f().next().value",
+       factory->NewNumberFromInt(42)},
+      {"function* f() { for (let x of [42]) yield x}; return f().next().value",
+       factory->NewNumberFromInt(42)},
+  };
+
+  for (size_t i = 0; i < arraysize(tests); i++) {
+    std::string source(
+        InterpreterTester::SourceForBody(tests[i].first));
+    InterpreterTester tester(handles.main_isolate(), source.c_str());
+    auto callable = tester.GetCallable<>();
+
+    Handle<i::Object> return_value = callable().ToHandleChecked();
+    CHECK(return_value->SameValue(*tests[i].second));
+  }
+
+  FLAG_ignition_generators = old_flag;
+}
+
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8