text: // Copyright 2016 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 "test/unittests/test-helpers.h"
  
  #include "include/v8.h"
  #include "src/api/api.h"
  #include "src/execution/isolate.h"
  #include "src/handles/handles.h"
  #include "src/objects/objects-inl.h"
  #include "src/objects/objects.h"
  #include "src/parsing/scanner-character-streams.h"
  #include "src/parsing/scanner.h"
  
  namespace v8 {
  namespace internal {
  namespace test {
  
  Handle<String> CreateSource(Isolate* isolate,
                              ExternalOneByteString::Resource* maybe_resource) {
    if (!maybe_resource) {
      static const char test_script[] = "(x) { x*x; }";
      maybe_resource = new test::ScriptResource(test_script, strlen(test_script));
    }
    return isolate->factory()
        ->NewExternalStringFromOneByte(maybe_resource)
        .ToHandleChecked();
  }
  
  Handle<SharedFunctionInfo> CreateSharedFunctionInfo(
      Isolate* isolate,
      v8::String::ExternalOneByteStringResource* maybe_resource) {
    HandleScope scope(isolate);
    Handle<String> source = CreateSource(isolate, maybe_resource);
    Handle<Script> script = isolate->factory()->NewScript(source);
    Handle<WeakFixedArray> infos = isolate->factory()->NewWeakFixedArray(3);
    script->set_shared_function_infos(*infos);
    Handle<SharedFunctionInfo> shared =
        isolate->factory()->NewSharedFunctionInfoForBuiltin(
            isolate->factory()->NewStringFromAsciiChecked("f"),
            Builtins::kCompileLazy);
    int function_literal_id = 1;
    shared->set_function_literal_id(function_literal_id);
    // Ensure that the function can be compiled lazily.
    shared->set_uncompiled_data(
        *isolate->factory()->NewUncompiledDataWithoutPreparseData(
            ReadOnlyRoots(isolate).empty_string_handle(), 0, source->length()));
    // Make sure we have an outer scope info, even though it's empty
    shared->set_raw_outer_scope_info_or_feedback_metadata(
        ScopeInfo::Empty(isolate));
    shared->SetScript(ReadOnlyRoots(isolate), *script, function_literal_id);
    return scope.CloseAndEscape(shared);
  }
  
  std::unique_ptr<ParseInfo> OuterParseInfoForShared(
      Isolate* isolate, Handle<SharedFunctionInfo> shared) {
    Script script = Script::cast(shared->script());
    std::unique_ptr<ParseInfo> result =
        std::make_unique<ParseInfo>(isolate, script);
  
    // Create a character stream to simulate the parser having done so for the
    // to-level ParseProgram.
    Handle<String> source(String::cast(script.source()), isolate);
    std::unique_ptr<Utf16CharacterStream> stream(
        ScannerStream::For(isolate, source));
    result->set_character_stream(std::move(stream));
  
    return result;
  }
  
  }  // namespace test
  }  // namespace internal
  }  // namespace v8
  