1 files changed, 87 insertions, 0 deletions
diff --git a/core/core_test.js b/core/core_test.js
new file mode 100644
index 000000000..7821f93a6
--- /dev/null
+++ b/core/core_test.js
@@ -0,0 +1,87 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+function assert(cond) {
+  if (!cond) {
+    throw Error("assert");
+  }
+}
+
+// Check overflow (corresponds to full_records test in rust)
+function fullRecords(q) {
+  q.reset();
+  const oneByte = new Uint8Array([42]);
+  for (let i = 0; i < q.MAX_RECORDS; i++) {
+    assert(q.push(1, oneByte));
+  }
+  assert(!q.push(1, oneByte));
+  const [opId, r] = q.shift();
+  assert(opId == 1);
+  assert(r.byteLength == 1);
+  assert(r[0] == 42);
+  // Even if we shift one off, we still cannot push a new record.
+  assert(!q.push(1, oneByte));
+}
+
+function main() {
+  const q = Deno.core.sharedQueue;
+
+  const h = q.head();
+  assert(h > 0);
+
+  // This record's len is not divisble by
+  // 4 so after pushing it to the queue,
+  // next record offset should be aligned to 4.
+  let r = new Uint8Array([1, 2, 3, 4, 5]);
+  const len = r.byteLength + h;
+  assert(q.push(1, r));
+  // Record should be aligned to 4 bytes
+  assert(q.head() == len + 3);
+
+  r = new Uint8Array([6, 7]);
+  assert(q.push(1, r));
+
+  r = new Uint8Array([8, 9, 10, 11]);
+  assert(q.push(1, r));
+  assert(q.numRecords() == 3);
+  assert(q.size() == 3);
+
+  let opId;
+  [opId, r] = q.shift();
+  assert(r.byteLength == 5);
+  assert(r[0] == 1);
+  assert(r[1] == 2);
+  assert(r[2] == 3);
+  assert(r[3] == 4);
+  assert(r[4] == 5);
+  assert(q.numRecords() == 3);
+  assert(q.size() == 2);
+
+  [opId, r] = q.shift();
+  assert(r.byteLength == 2);
+  assert(r[0] == 6);
+  assert(r[1] == 7);
+  assert(q.numRecords() == 3);
+  assert(q.size() == 1);
+
+  [opId, r] = q.shift();
+  assert(opId == 1);
+  assert(r.byteLength == 4);
+  assert(r[0] == 8);
+  assert(r[1] == 9);
+  assert(r[2] == 10);
+  assert(r[3] == 11);
+  assert(q.numRecords() == 0);
+  assert(q.size() == 0);
+
+  assert(q.shift() == null);
+  assert(q.shift() == null);
+  assert(q.numRecords() == 0);
+  assert(q.size() == 0);
+
+  fullRecords(q);
+
+  Deno.core.print("shared_queue_test.js ok\n");
+  q.reset();
+}
+
+main();