chore(core): Refactor runtime and split out tests (#19491)

This is a quick first refactoring to split the tests out of runtime and
move runtime-related code to a top-level runtime module.

There will be a followup to refactor imports a bit, but this is the
major change that will most likely conflict with other work and I want
to merge it early.

1 files changed, 74 insertions, 0 deletions

diff --git a/core/runtime/serialize_deserialize_test.js b/core/runtime/serialize_deserialize_test.js
new file mode 100644
index 000000000..70397cdf8
--- /dev/null
+++ b/core/runtime/serialize_deserialize_test.js
@@ -0,0 +1,74 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+"use strict";
+
+function assert(cond) {
+  if (!cond) {
+    throw Error("assert");
+  }
+}
+
+function assertArrayEquals(a1, a2) {
+  if (a1.length !== a2.length) throw Error("assert");
+
+  for (const index in a1) {
+    if (a1[index] !== a2[index]) {
+      throw Error(`assert: (index ${index}) ${a1[index]} !== ${a2[index]}`);
+    }
+  }
+}
+
+function main() {
+  const emptyString = "";
+  const emptyStringSerialized = [255, 15, 34, 0];
+  assertArrayEquals(
+    Deno.core.ops.op_serialize(emptyString),
+    emptyStringSerialized,
+  );
+  assert(
+    Deno.core.ops.op_deserialize(
+      new Uint8Array(emptyStringSerialized),
+    ) ===
+      emptyString,
+  );
+
+  const primitiveValueArray = ["test", "a", null, undefined];
+  // deno-fmt-ignore
+  const primitiveValueArraySerialized = [
+    255, 15, 65, 4, 34, 4, 116, 101, 115, 116,
+    34, 1, 97, 48, 95, 36, 0, 4,
+  ];
+  assertArrayEquals(
+    Deno.core.ops.op_serialize(primitiveValueArray),
+    primitiveValueArraySerialized,
+  );
+
+  assertArrayEquals(
+    Deno.core.ops.op_deserialize(
+      new Uint8Array(primitiveValueArraySerialized),
+    ),
+    primitiveValueArray,
+  );
+
+  const circularObject = { test: null, test2: "dd", test3: "aa" };
+  circularObject.test = circularObject;
+  // deno-fmt-ignore
+  const circularObjectSerialized = [
+    255, 15, 111, 34, 4, 116, 101, 115,
+    116, 94, 0, 34, 5, 116, 101, 115,
+    116, 50, 34, 2, 100, 100, 34, 5,
+    116, 101, 115, 116, 51, 34, 2, 97,
+    97, 123, 3,
+  ];
+
+  assertArrayEquals(
+    Deno.core.ops.op_serialize(circularObject),
+    circularObjectSerialized,
+  );
+
+  const deserializedCircularObject = Deno.core.ops.op_deserialize(
+    new Uint8Array(circularObjectSerialized),
+  );
+  assert(deserializedCircularObject.test == deserializedCircularObject);
+}
+
+main();