fix(core): error registration could pollute constructors (#10422)

Co-authored-by: Luca Casonato <lucacasonato@yahoo.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/core/error_builder_test.js b/core/error_builder_test.js
new file mode 100644
index 000000000..aae47c6cd
--- /dev/null
+++ b/core/error_builder_test.js
@@ -0,0 +1,30 @@
+const { core } = Deno;
+
+class DOMException {
+  constructor(message, code) {
+    this.msg = message;
+    this.code = code;
+  }
+}
+
+core.registerErrorBuilder(
+  "DOMExceptionOperationError",
+  function DOMExceptionOperationError(msg) {
+    return new DOMException(msg, "OperationError");
+  },
+);
+
+try {
+  core.opSync("op_err", undefined, null);
+  throw new Error("op_err didn't throw!");
+} catch (err) {
+  if (!(err instanceof DOMException)) {
+    throw new Error("err not DOMException");
+  }
+  if (err.msg !== "abc") {
+    throw new Error("err.message is incorrect");
+  }
+  if (err.code !== "OperationError") {
+    throw new Error("err.code is incorrect");
+  }
+}