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//
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// Adapted from test/mjsunit/compiler/variables.js

#include <limits.h>

#include "src/v8.h"

#include "src/api.h"
#include "src/base/platform/platform.h"
#include "src/compilation-cache.h"
#include "src/execution.h"
#include "src/isolate.h"
#include "src/objects-inl.h"
#include "src/unicode-inl.h"
#include "src/utils.h"
#include "test/cctest/cctest.h"

using ::v8::Context;
using ::v8::Extension;
using ::v8::Function;
using ::v8::FunctionTemplate;
using ::v8::HandleScope;
using ::v8::Local;
using ::v8::Message;
using ::v8::MessageCallback;
using ::v8::Object;
using ::v8::ObjectTemplate;
using ::v8::Persistent;
using ::v8::Script;
using ::v8::StackTrace;
using ::v8::String;
using ::v8::TryCatch;
using ::v8::Undefined;
using ::v8::V8;
using ::v8::Value;

static void ExpectInt32(Local<Context> context, int32_t expected,
                        Local<Value> result) {
  CHECK(result->IsInt32());
  CHECK_EQ(expected, result->Int32Value(context).FromJust());
}


// Global variables.
TEST(global_variables) {
  LocalContext env;
  v8::HandleScope scope(env->GetIsolate());
  Local<Value> result = CompileRun(
"var x = 0;"
"function f0() { return x; }"
"f0();");
  ExpectInt32(env.local(), 0, result);
}


// Parameters.
TEST(parameters) {
  LocalContext env;
  v8::HandleScope scope(env->GetIsolate());
  Local<Value> result = CompileRun(
"function f1(x) { return x; }"
"f1(1);");
  ExpectInt32(env.local(), 1, result);
}


// Stack-allocated locals.
TEST(stack_allocated_locals) {
  LocalContext env;
  v8::HandleScope scope(env->GetIsolate());
  Local<Value> result = CompileRun(
"function f2() { var x = 2; return x; }"
"f2();");
  ExpectInt32(env.local(), 2, result);
}


// Context-allocated locals.  Local function forces x into f3's context.
TEST(context_allocated_locals) {
  LocalContext env;
  v8::HandleScope scope(env->GetIsolate());
  Local<Value> result = CompileRun(
"function f3(x) {"
"  function g() { return x; }"
"  return x;"
"}"
"f3(3);");
  ExpectInt32(env.local(), 3, result);
}


// Local function reads x from an outer context.
TEST(read_from_outer_context) {
  LocalContext env;
  v8::HandleScope scope(env->GetIsolate());
  Local<Value> result = CompileRun(
"function f4(x) {"
"  function g() { return x; }"
"  return g();"
"}"
"f4(4);");
  ExpectInt32(env.local(), 4, result);
}


// Local function reads x from an outer context.
TEST(lookup_slots) {
  LocalContext env;
  v8::HandleScope scope(env->GetIsolate());
  Local<Value> result = CompileRun(
"function f5(x) {"
"  with ({}) return x;"
"}"
"f5(5);");
  ExpectInt32(env.local(), 5, result);
}
