1 files changed, 69 insertions, 0 deletions
diff --git a/deno2/js/mock_runtime.js b/deno2/js/mock_runtime.js
new file mode 100644
index 000000000..07e5a2ca8
--- /dev/null
+++ b/deno2/js/mock_runtime.js
@@ -0,0 +1,69 @@
+// A simple runtime that doesn't involve typescript or protobufs to test
+// libdeno. Invoked by mock_runtime_test.cc
+const window = eval("this");
+
+function assert(cond) {
+  if (!cond) throw Error("mock_runtime.js assert failed");
+}
+
+function typedArrayToArrayBuffer(ta) {
+  return ta.buffer.slice(ta.byteOffset, ta.byteOffset + ta.byteLength);
+}
+
+function CanCallFunction() {
+  denoPrint("Hello world from foo");
+  return "foo";
+}
+
+// This object is created to test snapshotting.
+// See DeserializeInternalFieldsCallback and SerializeInternalFieldsCallback.
+const snapshotted = new Uint8Array([1, 3, 3, 7]);
+
+function TypedArraySnapshots() {
+  assert(snapshotted[0] === 1);
+  assert(snapshotted[1] === 3);
+  assert(snapshotted[2] === 3);
+  assert(snapshotted[3] === 7);
+}
+
+function PubSuccess() {
+  denoSub((channel, msg) => {
+    assert(channel === "PubSuccess");
+    denoPrint("PubSuccess: ok");
+  });
+}
+
+function PubByteLength() {
+  denoSub((channel, msg) => {
+    assert(channel === "PubByteLength");
+    assert(msg instanceof ArrayBuffer);
+    assert(msg.byteLength === 3);
+  });
+}
+
+function SubReturnEmpty() {
+  const ui8 = new Uint8Array("abc".split("").map(c => c.charCodeAt(0)));
+  const ab = typedArrayToArrayBuffer(ui8);
+  let r = denoPub("SubReturnEmpty", ab);
+  assert(r == null);
+  r = denoPub("SubReturnEmpty", ab);
+  assert(r == null);
+}
+
+function SubReturnBar() {
+  const ui8 = new Uint8Array("abc".split("").map(c => c.charCodeAt(0)));
+  const ab = typedArrayToArrayBuffer(ui8);
+  const r = denoPub("SubReturnBar", ab);
+  assert(r instanceof ArrayBuffer);
+  assert(r.byteLength === 3);
+  const rui8 = new Uint8Array(r);
+  const rstr = String.fromCharCode(...rui8);
+  assert(rstr === "bar");
+}
+
+function DoubleSubFails() {
+  // denoSub is an internal function and should only be called once from the
+  // runtime.
+  denoSub((channel, msg) => assert(false));
+  denoSub((channel, msg) => assert(false));
+}