[bun:ffi] Re-enable most of the tests

1 files changed, 582 insertions, 543 deletions

diff --git a/test/bun.js/ffi.test.js b/test/bun.js/ffi.test.js
index db2cfb6d4..e24aaaf66 100644
--- a/test/bun.js/ffi.test.js
+++ b/test/bun.js/ffi.test.js
@@ -1,543 +1,582 @@
-// import { describe, it, expect } from "bun:test";
-// import { unsafe } from "bun";
-// //
-// import {
-//   native,
-//   viewSource,
-//   dlopen,
-//   CString,
-//   ptr,
-//   toBuffer,
-//   toArrayBuffer,
-//   FFIType,
-//   callback,
-//   CFunction,
-// } from "bun:ffi";
-
-// it("ffi print", async () => {
-//   await Bun.write(
-//     import.meta.dir + "/ffi.test.fixture.callback.c",
-//     viewSource(
-//       {
-//         returns: "bool",
-//         args: ["ptr"],
-//       },
-//       true
-//     )
-//   );
-//   await Bun.write(
-//     import.meta.dir + "/ffi.test.fixture.receiver.c",
-//     viewSource(
-//       {
-//         not_a_callback: {
-//           returns: "float",
-//           args: ["float"],
-//         },
-//       },
-//       false
-//     )[0]
-//   );
-//   expect(
-//     viewSource(
-//       {
-//         returns: "int8_t",
-//         args: [],
-//       },
-//       true
-//     ).length > 0
-//   ).toBe(true);
-//   expect(
-//     viewSource(
-//       {
-//         a: {
-//           returns: "int8_t",
-//           args: [],
-//         },
-//       },
-//       false
-//     ).length > 0
-//   ).toBe(true);
-// });
-
-// function getTypes(fast) {
-//   const int64_t = fast ? "i64_fast" : "int64_t";
-//   const uint64_t = fast ? "u64_fast" : "uint64_t";
-//   return {
-//     returns_true: {
-//       returns: "bool",
-//       args: [],
-//     },
-//     returns_false: {
-//       returns: "bool",
-//       args: [],
-//     },
-//     returns_42_char: {
-//       returns: "char",
-//       args: [],
-//     },
-//     returns_42_float: {
-//       returns: "float",
-//       args: [],
-//     },
-//     returns_42_double: {
-//       returns: "double",
-//       args: [],
-//     },
-//     returns_42_uint8_t: {
-//       returns: "uint8_t",
-//       args: [],
-//     },
-//     returns_neg_42_int8_t: {
-//       returns: "int8_t",
-//       args: [],
-//     },
-//     returns_42_uint16_t: {
-//       returns: "uint16_t",
-//       args: [],
-//     },
-//     returns_42_uint32_t: {
-//       returns: "uint32_t",
-//       args: [],
-//     },
-//     returns_42_uint64_t: {
-//       returns: uint64_t,
-//       args: [],
-//     },
-//     returns_neg_42_int16_t: {
-//       returns: "int16_t",
-//       args: [],
-//     },
-//     returns_neg_42_int32_t: {
-//       returns: "int32_t",
-//       args: [],
-//     },
-//     returns_neg_42_int64_t: {
-//       returns: int64_t,
-//       args: [],
-//     },
-
-//     identity_char: {
-//       returns: "char",
-//       args: ["char"],
-//     },
-//     identity_float: {
-//       returns: "float",
-//       args: ["float"],
-//     },
-//     identity_bool: {
-//       returns: "bool",
-//       args: ["bool"],
-//     },
-//     identity_double: {
-//       returns: "double",
-//       args: ["double"],
-//     },
-//     identity_int8_t: {
-//       returns: "int8_t",
-//       args: ["int8_t"],
-//     },
-//     identity_int16_t: {
-//       returns: "int16_t",
-//       args: ["int16_t"],
-//     },
-//     identity_int32_t: {
-//       returns: "int32_t",
-//       args: ["int32_t"],
-//     },
-//     identity_int64_t: {
-//       returns: int64_t,
-//       args: [int64_t],
-//     },
-//     identity_uint8_t: {
-//       returns: "uint8_t",
-//       args: ["uint8_t"],
-//     },
-//     identity_uint16_t: {
-//       returns: "uint16_t",
-//       args: ["uint16_t"],
-//     },
-//     identity_uint32_t: {
-//       returns: "uint32_t",
-//       args: ["uint32_t"],
-//     },
-//     identity_uint64_t: {
-//       returns: uint64_t,
-//       args: [uint64_t],
-//     },
-
-//     add_char: {
-//       returns: "char",
-//       args: ["char", "char"],
-//     },
-//     add_float: {
-//       returns: "float",
-//       args: ["float", "float"],
-//     },
-//     add_double: {
-//       returns: "double",
-//       args: ["double", "double"],
-//     },
-//     add_int8_t: {
-//       returns: "int8_t",
-//       args: ["int8_t", "int8_t"],
-//     },
-//     add_int16_t: {
-//       returns: "int16_t",
-//       args: ["int16_t", "int16_t"],
-//     },
-//     add_int32_t: {
-//       returns: "int32_t",
-//       args: ["int32_t", "int32_t"],
-//     },
-//     add_int64_t: {
-//       returns: int64_t,
-//       args: [int64_t, int64_t],
-//     },
-//     add_uint8_t: {
-//       returns: "uint8_t",
-//       args: ["uint8_t", "uint8_t"],
-//     },
-//     add_uint16_t: {
-//       returns: "uint16_t",
-//       args: ["uint16_t", "uint16_t"],
-//     },
-//     add_uint32_t: {
-//       returns: "uint32_t",
-//       args: ["uint32_t", "uint32_t"],
-//     },
-
-//     does_pointer_equal_42_as_int32_t: {
-//       returns: "bool",
-//       args: ["ptr"],
-//     },
-
-//     ptr_should_point_to_42_as_int32_t: {
-//       returns: "ptr",
-//       args: [],
-//     },
-//     identity_ptr: {
-//       returns: "ptr",
-//       args: ["ptr"],
-//     },
-//     add_uint64_t: {
-//       returns: uint64_t,
-//       args: [uint64_t, uint64_t],
-//     },
-
-//     cb_identity_true: {
-//       returns: "bool",
-//       args: ["ptr"],
-//     },
-//     cb_identity_false: {
-//       returns: "bool",
-//       args: ["ptr"],
-//     },
-//     cb_identity_42_char: {
-//       returns: "char",
-//       args: ["ptr"],
-//     },
-//     cb_identity_42_float: {
-//       returns: "float",
-//       args: ["ptr"],
-//     },
-//     cb_identity_42_double: {
-//       returns: "double",
-//       args: ["ptr"],
-//     },
-//     cb_identity_42_uint8_t: {
-//       returns: "uint8_t",
-//       args: ["ptr"],
-//     },
-//     cb_identity_neg_42_int8_t: {
-//       returns: "int8_t",
-//       args: ["ptr"],
-//     },
-//     cb_identity_42_uint16_t: {
-//       returns: "uint16_t",
-//       args: ["ptr"],
-//     },
-//     cb_identity_42_uint32_t: {
-//       returns: "uint32_t",
-//       args: ["ptr"],
-//     },
-//     cb_identity_42_uint64_t: {
-//       returns: uint64_t,
-//       args: ["ptr"],
-//     },
-//     cb_identity_neg_42_int16_t: {
-//       returns: "int16_t",
-//       args: ["ptr"],
-//     },
-//     cb_identity_neg_42_int32_t: {
-//       returns: "int32_t",
-//       args: ["ptr"],
-//     },
-//     cb_identity_neg_42_int64_t: {
-//       returns: int64_t,
-//       args: ["ptr"],
-//     },
-
-//     return_a_function_ptr_to_function_that_returns_true: {
-//       returns: "ptr",
-//       args: [],
-//     },
-//   };
-// }
-
-// function ffiRunner(types) {
-//   const {
-//     symbols: {
-//       returns_true,
-//       returns_false,
-//       return_a_function_ptr_to_function_that_returns_true,
-//       returns_42_char,
-//       returns_42_float,
-//       returns_42_double,
-//       returns_42_uint8_t,
-//       returns_neg_42_int8_t,
-//       returns_42_uint16_t,
-//       returns_42_uint32_t,
-//       returns_42_uint64_t,
-//       returns_neg_42_int16_t,
-//       returns_neg_42_int32_t,
-//       returns_neg_42_int64_t,
-//       identity_char,
-//       identity_float,
-//       identity_bool,
-//       identity_double,
-//       identity_int8_t,
-//       identity_int16_t,
-//       identity_int32_t,
-//       identity_int64_t,
-//       identity_uint8_t,
-//       identity_uint16_t,
-//       identity_uint32_t,
-//       identity_uint64_t,
-//       add_char,
-//       add_float,
-//       add_double,
-//       add_int8_t,
-//       add_int16_t,
-//       add_int32_t,
-//       add_int64_t,
-//       add_uint8_t,
-//       add_uint16_t,
-//       identity_ptr,
-//       add_uint32_t,
-//       add_uint64_t,
-//       does_pointer_equal_42_as_int32_t,
-//       ptr_should_point_to_42_as_int32_t,
-//       cb_identity_true,
-//       cb_identity_false,
-//       cb_identity_42_char,
-//       cb_identity_42_float,
-//       cb_identity_42_double,
-//       cb_identity_42_uint8_t,
-//       cb_identity_neg_42_int8_t,
-//       cb_identity_42_uint16_t,
-//       cb_identity_42_uint32_t,
-//       cb_identity_42_uint64_t,
-//       cb_identity_neg_42_int16_t,
-//       cb_identity_neg_42_int32_t,
-//       cb_identity_neg_42_int64_t,
-//     },
-//     close,
-//   } = dlopen("/tmp/bun-ffi-test.dylib", types);
-
-//   expect(returns_true()).toBe(true);
-
-//   expect(returns_false()).toBe(false);
-
-//   expect(returns_42_char()).toBe(42);
-//   console.log(
-//     returns_42_uint64_t().valueOf(),
-//     returns_42_uint64_t(),
-//     returns_42_uint64_t().valueOf() === returns_42_uint64_t()
-//   );
-//   expect(returns_42_uint64_t().valueOf()).toBe(42);
-
-//   expect(Math.fround(returns_42_float())).toBe(Math.fround(42.41999804973602));
-//   expect(returns_42_double()).toBe(42.42);
-//   expect(returns_42_uint8_t()).toBe(42);
-//   expect(returns_neg_42_int8_t()).toBe(-42);
-//   expect(returns_42_uint16_t()).toBe(42);
-//   expect(returns_42_uint32_t()).toBe(42);
-//   expect(returns_42_uint64_t()).toBe(42);
-//   expect(returns_neg_42_int16_t()).toBe(-42);
-//   expect(returns_neg_42_int32_t()).toBe(-42);
-//   expect(identity_int32_t(10)).toBe(10);
-//   expect(returns_neg_42_int64_t()).toBe(-42);
-
-//   expect(identity_char(10)).toBe(10);
-
-//   expect(identity_float(10.199999809265137)).toBe(10.199999809265137);
-
-//   expect(identity_bool(true)).toBe(true);
-
-//   expect(identity_bool(false)).toBe(false);
-//   expect(identity_double(10.100000000000364)).toBe(10.100000000000364);
-
-//   expect(identity_int8_t(10)).toBe(10);
-//   expect(identity_int16_t(10)).toBe(10);
-//   expect(identity_int64_t(10)).toBe(10);
-//   expect(identity_uint8_t(10)).toBe(10);
-//   expect(identity_uint16_t(10)).toBe(10);
-//   expect(identity_uint32_t(10)).toBe(10);
-//   expect(identity_uint64_t(10)).toBe(10);
-
-//   var bigArray = new BigUint64Array(8);
-//   new Uint8Array(bigArray.buffer).fill(255);
-//   var bigIntArray = new BigInt64Array(bigArray.buffer);
-//   expect(identity_uint64_t(bigArray[0])).toBe(bigArray[0]);
-//   expect(identity_uint64_t(bigArray[0] - BigInt(1))).toBe(
-//     bigArray[0] - BigInt(1)
-//   );
-
-//   expect(add_uint64_t(BigInt(-1) * bigArray[0], bigArray[0])).toBe(0);
-//   expect(add_uint64_t(BigInt(-1) * bigArray[0] + BigInt(10), bigArray[0])).toBe(
-//     10
-//   );
-//   expect(identity_uint64_t(0)).toBe(0);
-//   expect(identity_uint64_t(100)).toBe(100);
-//   expect(identity_uint64_t(BigInt(100))).toBe(100);
-//   expect(identity_int64_t(bigIntArray[0])).toBe(bigIntArray[0]);
-//   expect(identity_int64_t(bigIntArray[0] - BigInt(1))).toBe(
-//     bigIntArray[0] - BigInt(1)
-//   );
-
-//   expect(add_char(1, 1)).toBe(2);
-//   expect(add_float(2.4, 2.8)).toBe(Math.fround(5.2));
-//   expect(add_double(4.2, 0.1)).toBe(4.3);
-//   expect(add_int8_t(1, 1)).toBe(2);
-//   expect(add_int16_t(1, 1)).toBe(2);
-//   expect(add_int32_t(1, 1)).toBe(2);
-//   expect(add_int64_t(1, 1)).toBe(2);
-//   expect(add_uint8_t(1, 1)).toBe(2);
-//   expect(add_uint16_t(1, 1)).toBe(2);
-//   expect(add_uint32_t(1, 1)).toBe(2);
-
-//   const cptr = ptr_should_point_to_42_as_int32_t();
-//   expect(cptr != 0).toBe(true);
-//   expect(typeof cptr === "number").toBe(true);
-//   expect(does_pointer_equal_42_as_int32_t(cptr)).toBe(true);
-//   const buffer = toBuffer(cptr, 0, 4);
-//   expect(buffer.readInt32(0)).toBe(42);
-//   expect(new DataView(toArrayBuffer(cptr, 0, 4), 0, 4).getInt32(0, true)).toBe(
-//     42
-//   );
-//   expect(ptr(buffer)).toBe(cptr);
-//   expect(new CString(cptr, 0, 1).toString()).toBe("*");
-//   expect(identity_ptr(cptr)).toBe(cptr);
-//   const second_ptr = ptr(new Buffer(8));
-//   expect(identity_ptr(second_ptr)).toBe(second_ptr);
-
-//   var myCFunction = new CFunction({
-//     ptr: return_a_function_ptr_to_function_that_returns_true(),
-//     returns: "bool",
-//   });
-//   expect(myCFunction()).toBe(true);
-
-//   // function identityBool() {
-//   //   return true;
-//   // }
-//   // globalThis.identityBool = identityBool;
-
-//   // const first = native.callback(
-//   //   {
-//   //     returns: "bool",
-//   //   },
-//   //   identityBool
-//   // );
-//   // expect(
-//   // cb_identity_true()
-//   // ).toBe(true);
-
-//   // expect(cb_identity_true(first)).toBe(true);
-
-//   // expect(
-//   //   cb_identity_false(
-//   //     callback(
-//   //       {
-//   //         returns: "bool",
-//   //       },
-//   //       () => false
-//   //     )
-//   //   )
-//   // ).toBe(false);
-
-//   // expect(
-//   //   cb_identity_42_char(
-//   //     callback(
-//   //       {
-//   //         returns: "char",
-//   //       },
-//   //       () => 42
-//   //     )
-//   //   )
-//   // ).toBe(42);
-//   // expect(
-//   //   cb_identity_42_uint8_t(
-//   //     callback(
-//   //       {
-//   //         returns: "uint8_t",
-//   //       },
-//   //       () => 42
-//   //     )
-//   //   )
-//   // ).toBe(42);
-
-//   // cb_identity_neg_42_int8_t(
-//   //   callback(
-//   //     {
-//   //       returns: "int8_t",
-//   //     },
-//   //     () => -42
-//   //   )
-//   // ).toBe(-42);
-
-//   // cb_identity_42_uint16_t(
-//   //   callback(
-//   //     {
-//   //       returns: "uint16_t",
-//   //     },
-//   //     () => 42
-//   //   )
-//   // ).toBe(42);
-
-//   // cb_identity_42_uint32_t(
-//   //   callback(
-//   //     {
-//   //       returns: "uint32_t",
-//   //     },
-//   //     () => 42
-//   //   )
-//   // ).toBe(42);
-
-//   // cb_identity_neg_42_int16_t(
-//   //   callback(
-//   //     {
-//   //       returns: "int16_t",
-//   //     },
-//   //     () => -42
-//   //   )
-//   // ).toBe(-42);
-
-//   // cb_identity_neg_42_int32_t(
-//   //   callback(
-//   //     {
-//   //       returns: "int32_t",
-//   //     },
-//   //     () => -42
-//   //   )
-//   // ).toBe(-42);
-
-//   close();
-// }
-
-// it("run ffi fast", () => {
-//   ffiRunner(getTypes(true));
-// });
-
-// it("run ffi", () => {
-//   ffiRunner(getTypes(false));
-// });
+import { describe, it, expect } from "bun:test";
+import { unsafe } from "bun";
+//
+import {
+  native,
+  viewSource,
+  dlopen,
+  CString,
+  ptr,
+  toBuffer,
+  toArrayBuffer,
+  FFIType,
+  callback,
+  CFunction,
+} from "bun:ffi";
+
+it("ffi print", async () => {
+  await Bun.write(
+    import.meta.dir + "/ffi.test.fixture.callback.c",
+    viewSource(
+      {
+        returns: "bool",
+        args: ["ptr"],
+      },
+      true
+    )
+  );
+  await Bun.write(
+    import.meta.dir + "/ffi.test.fixture.receiver.c",
+    viewSource(
+      {
+        not_a_callback: {
+          returns: "float",
+          args: ["float"],
+        },
+      },
+      false
+    )[0]
+  );
+  expect(
+    viewSource(
+      {
+        returns: "int8_t",
+        args: [],
+      },
+      true
+    ).length > 0
+  ).toBe(true);
+  expect(
+    viewSource(
+      {
+        a: {
+          returns: "int8_t",
+          args: [],
+        },
+      },
+      false
+    ).length > 0
+  ).toBe(true);
+});
+
+function getTypes(fast) {
+  const int64_t = fast ? "i64_fast" : "int64_t";
+  const uint64_t = fast ? "u64_fast" : "uint64_t";
+  return {
+    returns_true: {
+      returns: "bool",
+      args: [],
+    },
+    returns_false: {
+      returns: "bool",
+      args: [],
+    },
+    returns_42_char: {
+      returns: "char",
+      args: [],
+    },
+    returns_42_float: {
+      returns: "float",
+      args: [],
+    },
+    returns_42_double: {
+      returns: "double",
+      args: [],
+    },
+    returns_42_uint8_t: {
+      returns: "uint8_t",
+      args: [],
+    },
+    returns_neg_42_int8_t: {
+      returns: "int8_t",
+      args: [],
+    },
+    returns_42_uint16_t: {
+      returns: "uint16_t",
+      args: [],
+    },
+    returns_42_uint32_t: {
+      returns: "uint32_t",
+      args: [],
+    },
+    returns_42_uint64_t: {
+      returns: uint64_t,
+      args: [],
+    },
+    returns_neg_42_int16_t: {
+      returns: "int16_t",
+      args: [],
+    },
+    returns_neg_42_int32_t: {
+      returns: "int32_t",
+      args: [],
+    },
+    returns_neg_42_int64_t: {
+      returns: int64_t,
+      args: [],
+    },
+
+    identity_char: {
+      returns: "char",
+      args: ["char"],
+    },
+    identity_float: {
+      returns: "float",
+      args: ["float"],
+    },
+    identity_bool: {
+      returns: "bool",
+      args: ["bool"],
+    },
+    identity_double: {
+      returns: "double",
+      args: ["double"],
+    },
+    identity_int8_t: {
+      returns: "int8_t",
+      args: ["int8_t"],
+    },
+    identity_int16_t: {
+      returns: "int16_t",
+      args: ["int16_t"],
+    },
+    identity_int32_t: {
+      returns: "int32_t",
+      args: ["int32_t"],
+    },
+    identity_int64_t: {
+      returns: int64_t,
+      args: [int64_t],
+    },
+    identity_uint8_t: {
+      returns: "uint8_t",
+      args: ["uint8_t"],
+    },
+    identity_uint16_t: {
+      returns: "uint16_t",
+      args: ["uint16_t"],
+    },
+    identity_uint32_t: {
+      returns: "uint32_t",
+      args: ["uint32_t"],
+    },
+    identity_uint64_t: {
+      returns: uint64_t,
+      args: [uint64_t],
+    },
+
+    add_char: {
+      returns: "char",
+      args: ["char", "char"],
+    },
+    add_float: {
+      returns: "float",
+      args: ["float", "float"],
+    },
+    add_double: {
+      returns: "double",
+      args: ["double", "double"],
+    },
+    add_int8_t: {
+      returns: "int8_t",
+      args: ["int8_t", "int8_t"],
+    },
+    add_int16_t: {
+      returns: "int16_t",
+      args: ["int16_t", "int16_t"],
+    },
+    add_int32_t: {
+      returns: "int32_t",
+      args: ["int32_t", "int32_t"],
+    },
+    add_int64_t: {
+      returns: int64_t,
+      args: [int64_t, int64_t],
+    },
+    add_uint8_t: {
+      returns: "uint8_t",
+      args: ["uint8_t", "uint8_t"],
+    },
+    add_uint16_t: {
+      returns: "uint16_t",
+      args: ["uint16_t", "uint16_t"],
+    },
+    add_uint32_t: {
+      returns: "uint32_t",
+      args: ["uint32_t", "uint32_t"],
+    },
+
+    does_pointer_equal_42_as_int32_t: {
+      returns: "bool",
+      args: ["ptr"],
+    },
+
+    ptr_should_point_to_42_as_int32_t: {
+      returns: "ptr",
+      args: [],
+    },
+    identity_ptr: {
+      returns: "ptr",
+      args: ["ptr"],
+    },
+    add_uint64_t: {
+      returns: uint64_t,
+      args: [uint64_t, uint64_t],
+    },
+
+    cb_identity_true: {
+      returns: "bool",
+      args: ["ptr"],
+    },
+    cb_identity_false: {
+      returns: "bool",
+      args: ["ptr"],
+    },
+    cb_identity_42_char: {
+      returns: "char",
+      args: ["ptr"],
+    },
+    cb_identity_42_float: {
+      returns: "float",
+      args: ["ptr"],
+    },
+    cb_identity_42_double: {
+      returns: "double",
+      args: ["ptr"],
+    },
+    cb_identity_42_uint8_t: {
+      returns: "uint8_t",
+      args: ["ptr"],
+    },
+    cb_identity_neg_42_int8_t: {
+      returns: "int8_t",
+      args: ["ptr"],
+    },
+    cb_identity_42_uint16_t: {
+      returns: "uint16_t",
+      args: ["ptr"],
+    },
+    cb_identity_42_uint32_t: {
+      returns: "uint32_t",
+      args: ["ptr"],
+    },
+    cb_identity_42_uint64_t: {
+      returns: uint64_t,
+      args: ["ptr"],
+    },
+    cb_identity_neg_42_int16_t: {
+      returns: "int16_t",
+      args: ["ptr"],
+    },
+    cb_identity_neg_42_int32_t: {
+      returns: "int32_t",
+      args: ["ptr"],
+    },
+    cb_identity_neg_42_int64_t: {
+      returns: int64_t,
+      args: ["ptr"],
+    },
+
+    return_a_function_ptr_to_function_that_returns_true: {
+      returns: "ptr",
+      args: [],
+    },
+
+    getDeallocatorCalledCount: {
+      returns: "int32_t",
+      args: [],
+    },
+    getDeallocatorCallback: {
+      returns: "ptr",
+      args: [],
+    },
+    getDeallocatorBuffer: {
+      returns: "ptr",
+      args: [],
+    },
+  };
+}
+
+function ffiRunner(types) {
+  const {
+    symbols: {
+      returns_true,
+      returns_false,
+      return_a_function_ptr_to_function_that_returns_true,
+      returns_42_char,
+      returns_42_float,
+      returns_42_double,
+      returns_42_uint8_t,
+      returns_neg_42_int8_t,
+      returns_42_uint16_t,
+      returns_42_uint32_t,
+      returns_42_uint64_t,
+      returns_neg_42_int16_t,
+      returns_neg_42_int32_t,
+      returns_neg_42_int64_t,
+      identity_char,
+      identity_float,
+      identity_bool,
+      identity_double,
+      identity_int8_t,
+      identity_int16_t,
+      identity_int32_t,
+      identity_int64_t,
+      identity_uint8_t,
+      identity_uint16_t,
+      identity_uint32_t,
+      identity_uint64_t,
+      add_char,
+      add_float,
+      add_double,
+      add_int8_t,
+      add_int16_t,
+      add_int32_t,
+      add_int64_t,
+      add_uint8_t,
+      add_uint16_t,
+      identity_ptr,
+      add_uint32_t,
+      add_uint64_t,
+      does_pointer_equal_42_as_int32_t,
+      ptr_should_point_to_42_as_int32_t,
+      cb_identity_true,
+      cb_identity_false,
+      cb_identity_42_char,
+      cb_identity_42_float,
+      cb_identity_42_double,
+      cb_identity_42_uint8_t,
+      cb_identity_neg_42_int8_t,
+      cb_identity_42_uint16_t,
+      cb_identity_42_uint32_t,
+      cb_identity_42_uint64_t,
+      cb_identity_neg_42_int16_t,
+      cb_identity_neg_42_int32_t,
+      cb_identity_neg_42_int64_t,
+      getDeallocatorCalledCount,
+      getDeallocatorCallback,
+      getDeallocatorBuffer,
+    },
+    close,
+  } = dlopen("/tmp/bun-ffi-test.dylib", types);
+
+  expect(returns_true()).toBe(true);
+
+  expect(returns_false()).toBe(false);
+
+  expect(returns_42_char()).toBe(42);
+  //   console.log(
+  // returns_42_uint64_t().valueOf(),
+  // returns_42_uint64_t(),
+  // returns_42_uint64_t().valueOf() === returns_42_uint64_t()
+  //   );
+  //   expect(returns_42_uint64_t().valueOf()).toBe(42);
+
+  expect(Math.fround(returns_42_float())).toBe(Math.fround(42.41999804973602));
+  expect(returns_42_double()).toBe(42.42);
+  expect(returns_42_uint8_t()).toBe(42);
+  expect(returns_neg_42_int8_t()).toBe(-42);
+  expect(returns_42_uint16_t()).toBe(42);
+  expect(returns_42_uint32_t()).toBe(42);
+  //   expect(returns_42_uint64_t()).toBe(42);
+  expect(returns_neg_42_int16_t()).toBe(-42);
+  expect(returns_neg_42_int32_t()).toBe(-42);
+  expect(identity_int32_t(10)).toBe(10);
+  // expect(returns_neg_42_int64_t()).toBe(-42);
+
+  expect(identity_char(10)).toBe(10);
+
+  expect(identity_float(10.199999809265137)).toBe(10.199999809265137);
+
+  expect(identity_bool(true)).toBe(true);
+
+  expect(identity_bool(false)).toBe(false);
+  expect(identity_double(10.100000000000364)).toBe(10.100000000000364);
+
+  expect(identity_int8_t(10)).toBe(10);
+  expect(identity_int16_t(10)).toBe(10);
+  // expect(identity_int64_t(10)).toBe(10);
+  expect(identity_uint8_t(10)).toBe(10);
+  expect(identity_uint16_t(10)).toBe(10);
+  expect(identity_uint32_t(10)).toBe(10);
+  //   expect(identity_uint64_t(10)).toBe(10);
+
+  var bigArray = new BigUint64Array(8);
+  new Uint8Array(bigArray.buffer).fill(255);
+  var bigIntArray = new BigInt64Array(bigArray.buffer);
+  //   expect(identity_uint64_t(bigArray[0])).toBe(bigArray[0]);
+  //   expect(identity_uint64_t(bigArray[0] - BigInt(1))).toBe(
+  //     bigArray[0] - BigInt(1)
+  //   );
+
+  //   expect(add_uint64_t(BigInt(-1) * bigArray[0], bigArray[0])).toBe(0);
+  //   expect(add_uint64_t(BigInt(-1) * bigArray[0] + BigInt(10), bigArray[0])).toBe(
+  //     10
+  //   );
+  //   expect(identity_uint64_t(0)).toBe(0);
+  //   expect(identity_uint64_t(100)).toBe(100);
+  //   expect(identity_uint64_t(BigInt(100))).toBe(100);
+  // expect(identity_int64_t(bigIntArray[0])).toBe(bigIntArray[0]);
+  // expect(identity_int64_t(bigIntArray[0] - BigInt(1))).toBe(
+  //   bigIntArray[0] - BigInt(1)
+  // );
+
+  expect(add_char(1, 1)).toBe(2);
+  expect(add_float(2.4, 2.8)).toBe(Math.fround(5.2));
+  expect(add_double(4.2, 0.1)).toBe(4.3);
+  expect(add_int8_t(1, 1)).toBe(2);
+  expect(add_int16_t(1, 1)).toBe(2);
+  expect(add_int32_t(1, 1)).toBe(2);
+  // expect(add_int64_t(1, 1)).toBe(2);
+  expect(add_uint8_t(1, 1)).toBe(2);
+  expect(add_uint16_t(1, 1)).toBe(2);
+  expect(add_uint32_t(1, 1)).toBe(2);
+
+  const cptr = ptr_should_point_to_42_as_int32_t();
+  expect(cptr != 0).toBe(true);
+  expect(typeof cptr === "number").toBe(true);
+  expect(does_pointer_equal_42_as_int32_t(cptr)).toBe(true);
+  const buffer = toBuffer(cptr, 0, 4);
+  expect(buffer.readInt32(0)).toBe(42);
+  expect(new DataView(toArrayBuffer(cptr, 0, 4), 0, 4).getInt32(0, true)).toBe(
+    42
+  );
+  expect(ptr(buffer)).toBe(cptr);
+  expect(new CString(cptr, 0, 1).toString()).toBe("*");
+  expect(identity_ptr(cptr)).toBe(cptr);
+  const second_ptr = ptr(new Buffer(8));
+  expect(identity_ptr(second_ptr)).toBe(second_ptr);
+
+  var myCFunction = new CFunction({
+    ptr: return_a_function_ptr_to_function_that_returns_true(),
+    returns: "bool",
+  });
+  expect(myCFunction()).toBe(true);
+
+  // check deallocator is called
+  for (let constructor of [toArrayBuffer, toBuffer]) {
+    Bun.gc(true);
+
+    var bufferPtr = getDeallocatorBuffer();
+
+    for (let i = 0; i < 100; i++) {
+      // callback, no userData
+      constructor(bufferPtr, 0, 128, getDeallocatorCallback());
+
+      // callback, userData
+      constructor(bufferPtr, 0, 128, bufferPtr, getDeallocatorCallback());
+    }
+
+    Bun.gc(true);
+    expect(getDeallocatorCalledCount() >= 190).toBe(true);
+  }
+
+  // close the library
+  close();
+
+  /* 
+    --- 
+    This style of callback is not implemented yet 
+  */
+  // function identityBool() {
+  //   return true;
+  // }
+  // globalThis.identityBool = identityBool;
+
+  // const first = native.callback(
+  //   {
+  //     returns: "bool",
+  //   },
+  //   identityBool
+  // );
+  // expect(
+  // cb_identity_true()
+  // ).toBe(true);
+
+  // expect(cb_identity_true(first)).toBe(true);
+
+  // expect(
+  //   cb_identity_false(
+  //     callback(
+  //       {
+  //         returns: "bool",
+  //       },
+  //       () => false
+  //     )
+  //   )
+  // ).toBe(false);
+
+  // expect(
+  //   cb_identity_42_char(
+  //     callback(
+  //       {
+  //         returns: "char",
+  //       },
+  //       () => 42
+  //     )
+  //   )
+  // ).toBe(42);
+  // expect(
+  //   cb_identity_42_uint8_t(
+  //     callback(
+  //       {
+  //         returns: "uint8_t",
+  //       },
+  //       () => 42
+  //     )
+  //   )
+  // ).toBe(42);
+
+  // cb_identity_neg_42_int8_t(
+  //   callback(
+  //     {
+  //       returns: "int8_t",
+  //     },
+  //     () => -42
+  //   )
+  // ).toBe(-42);
+
+  // cb_identity_42_uint16_t(
+  //   callback(
+  //     {
+  //       returns: "uint16_t",
+  //     },
+  //     () => 42
+  //   )
+  // ).toBe(42);
+
+  // cb_identity_42_uint32_t(
+  //   callback(
+  //     {
+  //       returns: "uint32_t",
+  //     },
+  //     () => 42
+  //   )
+  // ).toBe(42);
+
+  // cb_identity_neg_42_int16_t(
+  //   callback(
+  //     {
+  //       returns: "int16_t",
+  //     },
+  //     () => -42
+  //   )
+  // ).toBe(-42);
+
+  // cb_identity_neg_42_int32_t(
+  //   callback(
+  //     {
+  //       returns: "int32_t",
+  //     },
+  //     () => -42
+  //   )
+  // ).toBe(-42);
+}
+
+it("run ffi fast", () => {
+  return ffiRunner(getTypes(true));
+});
+
+it("run ffi", () => {
+  return ffiRunner(getTypes(false));
+});