1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/fields/private-field-error-messages.js b/js/src/jit-test/tests/fields/private-field-error-messages.js
new file mode 100644
index 0000000000..4f7bfe0ae2
--- /dev/null
+++ b/js/src/jit-test/tests/fields/private-field-error-messages.js
@@ -0,0 +1,39 @@
+load(libdir + "asserts.js");
+
+class C {
+  #f = 1;
+  static test() {
+    assertTypeErrorMessage(
+      () => [].#f,
+      "can't access private field or method: object is not the right class"
+    );
+    assertTypeErrorMessage(
+      () => "ok".#f,
+      "can't access private field or method: object is not the right class"
+    );
+    assertTypeErrorMessage(
+      () => { [].#f = 3; },
+      "can't set private field: object is not the right class"
+    );
+    assertTypeErrorMessage(
+      () => { [].#f += 3; },
+      "can't set private field: object is not the right class"
+    );
+    assertTypeErrorMessage(
+      () => { [].#f++; },
+      "can't set private field: object is not the right class"
+    );
+
+    assertTypeErrorMessage(
+      () => "".#f,
+      "can't access private field or method: object is not the right class"
+    );
+    assertTypeErrorMessage(
+      () => { "".#f = 3; },
+      "can't set private field: object is not the right class"
+    );
+  }
+}
+
+C.test();
+