Add test to run things in parallel

Author: Vipul-Cariappa

unittests/CppInterOp/InterpreterTest.cpp

@@ -24,6 +24,7 @@
 #include "gtest/gtest.h"
 
 #include <algorithm>
+#include <thread>
 #include <utility>
 
 using ::testing::StartsWith;
@@ -368,22 +369,35 @@ TEST(InterpreterTest, MultipleInterpreter) {
 #if CLANG_VERSION_MAJOR < 20 && defined(EMSCRIPTEN)
   GTEST_SKIP() << "Test fails for Emscipten LLVM 20 builds";
 #endif
-  auto* I = Cpp::CreateInterpreter();
-  EXPECT_TRUE(I);
-  Cpp::Declare(R"(
-  void f() {}
-  )");
-  Cpp::TCppScope_t f = Cpp::GetNamed("f");
-
+  auto* I1 = Cpp::CreateInterpreter();
   auto* I2 = Cpp::CreateInterpreter();
+  auto* I3 = Cpp::CreateInterpreter();
+  auto* I4 = Cpp::CreateInterpreter();
+  EXPECT_TRUE(I1);
   EXPECT_TRUE(I2);
-  Cpp::Declare(R"(
-  void ff() {}
-  )");
-  Cpp::TCppScope_t ff = Cpp::GetNamed("ff");
-
-  auto f_callable = Cpp::MakeFunctionCallable(f);
-  EXPECT_EQ(f_callable.getKind(), Cpp::JitCall::Kind::kGenericCall);
-  auto ff_callable = Cpp::MakeFunctionCallable(ff);
-  EXPECT_EQ(ff_callable.getKind(), Cpp::JitCall::Kind::kGenericCall);
+  EXPECT_TRUE(I3);
+  EXPECT_TRUE(I4);
+
+  auto F = [](Cpp::TInterp_t I) {
+    Cpp::Declare(R"(
+    void f() {}
+    class MyKlass {};
+    )",
+                 false, I);
+    Cpp::TCppScope_t f = Cpp::GetNamed("f", Cpp::GetGlobalScope(I));
+    EXPECT_TRUE(f);
+    auto f_callable = Cpp::MakeFunctionCallable(f);
+    EXPECT_EQ(f_callable.getKind(), Cpp::JitCall::Kind::kGenericCall);
+    Cpp::TCppType_t f_type = Cpp::GetType("MyKlass", I);
+    EXPECT_EQ(Cpp::GetTypeAsString(f_type), "MyKlass");
+  };
+
+  std::thread t1(F, I1);
+  std::thread t2(F, I2);
+  std::thread t3(F, I3);
+  std::thread t4(F, I4);
+  t1.join();
+  t2.join();
+  t3.join();
+  t4.join();
 }