// 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 "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 {

ScriptResource* CreateSource(ScriptResource* maybe_resource) {
  if (!maybe_resource) {
    static const char test_script[] = "(x) { x*x; }";
    return new test::ScriptResource(test_script, strlen(test_script),
                                    JSParameterCount(1));
  } else {
    return maybe_resource;
  }
}

Handle<SharedFunctionInfo> CreateSharedFunctionInfo(
    Isolate* isolate, ScriptResource* maybe_resource) {
  HandleScope scope(isolate);
  test::ScriptResource* resource = CreateSource(maybe_resource);
  DirectHandle<String> source = isolate->factory()
                                    ->NewExternalStringFromOneByte(resource)
                                    .ToHandleChecked();
  DirectHandle<Script> script = isolate->factory()->NewScript(source);
  DirectHandle<WeakFixedArray> infos = isolate->factory()->NewWeakFixedArray(3);
  script->set_infos(*infos);
  Handle<SharedFunctionInfo> shared =
      isolate->factory()->NewSharedFunctionInfoForBuiltin(
          isolate->factory()->NewStringFromAsciiChecked("f"),
          Builtin::kCompileLazy, 0, kDontAdapt);
  int function_literal_id = 1;
  shared->set_function_literal_id(function_literal_id, kRelaxedStore);
  shared->set_internal_formal_parameter_count(resource->parameter_count());
  // Ensure that the function can be compiled lazily.
  shared->set_uncompiled_data(
      *isolate->factory()->NewUncompiledDataWithoutPreparseDataWithJob(
          isolate->factory()->empty_string(), 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(isolate, ReadOnlyRoots(isolate), *script,
                    function_literal_id);
  return scope.CloseAndEscape(shared);
}

std::unique_ptr<Utf16CharacterStream> SourceCharacterStreamForShared(
    Isolate* isolate, DirectHandle<SharedFunctionInfo> shared) {
  // Create a character stream to simulate the parser having done so for the
  // top-level ParseProgram.
  Tagged<Script> script = Cast<Script>(shared->script());
  Handle<String> source(Cast<String>(script->source()), isolate);
  std::unique_ptr<Utf16CharacterStream> stream(
      ScannerStream::For(isolate, source));
  return stream;
}

}  // namespace test
}  // namespace internal
}  // namespace v8