Re-land "Preserve m_pDynamicObjsMap until FXJS_PerIsolateData is destroyed.""

fpdfsdk/jsapi/fxjs_v8_embeddertest.cpp

 // Copyright 2015 PDFium 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 "testing/gtest/include/gtest/gtest.h"
 #include "testing/js_embedder_test.h"
 
 namespace {
 
-const wchar_t kScript[] = L"fred = 7";
+const double kExpected0 = 6.0;
+const double kExpected1 = 7.0;
+const double kExpected2 = 8.0;
+
+const wchar_t kScript0[] = L"fred = 6";
+const wchar_t kScript1[] = L"fred = 7";
+const wchar_t kScript2[] = L"fred = 8";
 
 }  // namespace
 
-class FXJSV8EmbedderTest : public JSEmbedderTest {};
+class FXJSV8EmbedderTest : public JSEmbedderTest {
+ public:
+  void ExecuteInCurrentContext(const wchar_t* script) {
+    FXJSErr error;
+    int sts = FXJS_Execute(isolate(), nullptr, script, &error);
+    EXPECT_EQ(0, sts);
+  }
+  void CheckAssignmentInCurrentContext(double expected) {
+    v8::Local<v8::Object> This = FXJS_GetThisObj(isolate());
+    v8::Local<v8::Value> fred = FXJS_GetObjectElement(isolate(), This, L"fred");
+    EXPECT_TRUE(fred->IsNumber());
+    EXPECT_EQ(expected, fred->ToNumber(isolate()->GetCurrentContext())
+                            .ToLocalChecked()
+                            ->Value());
+  }
+};
 
 TEST_F(FXJSV8EmbedderTest, Getters) {
   v8::Isolate::Scope isolate_scope(isolate());
 #ifdef PDF_ENABLE_XFA
   v8::Locker locker(isolate());
 #endif  // PDF_ENABLE_XFA
   v8::HandleScope handle_scope(isolate());
   v8::Context::Scope context_scope(GetV8Context());
 
-  FXJSErr error;
-  int sts = FXJS_Execute(isolate(), nullptr, kScript, &error);
-  EXPECT_EQ(0, sts);
+  ExecuteInCurrentContext(kScript1);
+  CheckAssignmentInCurrentContext(kExpected1);
+}
 
-  v8::Local<v8::Object> This = FXJS_GetThisObj(isolate());
-  v8::Local<v8::Value> fred = FXJS_GetObjectElement(isolate(), This, L"fred");
-  EXPECT_TRUE(fred->IsNumber());
+TEST_F(FXJSV8EmbedderTest, MultipleRutimes) {
+  v8::Isolate::Scope isolate_scope(isolate());
+#ifdef PDF_ENABLE_XFA
+  v8::Locker locker(isolate());
+#endif  // PDF_ENABLE_XFA
+  v8::HandleScope handle_scope(isolate());
+
+  v8::Global<v8::Context> global_context1;
+  std::vector<v8::Global<v8::Object>*> static_objects1;
+  FXJS_InitializeRuntime(isolate(), nullptr, &global_context1,
+                         &static_objects1);
+
+  v8::Global<v8::Context> global_context2;
+  std::vector<v8::Global<v8::Object>*> static_objects2;
+  FXJS_InitializeRuntime(isolate(), nullptr, &global_context2,
+                         &static_objects2);
+
+  v8::Context::Scope context_scope(GetV8Context());
+  ExecuteInCurrentContext(kScript0);
+  CheckAssignmentInCurrentContext(kExpected0);
+
+  {
+    v8::Local<v8::Context> context1 =
+        v8::Local<v8::Context>::New(isolate(), global_context1);
+    v8::Context::Scope context_scope(context1);
+    ExecuteInCurrentContext(kScript1);
+    CheckAssignmentInCurrentContext(kExpected1);
+  }
+  FXJS_ReleaseRuntime(isolate(), &global_context1, &static_objects1);
+
+  {
+    v8::Local<v8::Context> context2 =
+        v8::Local<v8::Context>::New(isolate(), global_context2);
+    v8::Context::Scope context_scope(context2);
+    ExecuteInCurrentContext(kScript2);
+    CheckAssignmentInCurrentContext(kExpected2);
+  }
+  FXJS_ReleaseRuntime(isolate(), &global_context2, &static_objects2);
+
+  CheckAssignmentInCurrentContext(kExpected0);
 }