1 files changed, 50 insertions, 0 deletions
diff --git a/testing/web-platform/tests/websockets/stream/tentative/websocket-error.any.js b/testing/web-platform/tests/websockets/stream/tentative/websocket-error.any.js
new file mode 100644
index 0000000000..b114bbb3e3
--- /dev/null
+++ b/testing/web-platform/tests/websockets/stream/tentative/websocket-error.any.js
@@ -0,0 +1,50 @@
+// META: global=window,worker
+
+'use strict';
+
+test(() => {
+  const error = new WebSocketError();
+  assert_equals(error.code, 0, 'DOMException code should be 0');
+  assert_equals(error.name, 'WebSocketError', 'name should be correct');
+  assert_equals(error.message, '', 'DOMException message should be empty');
+  assert_equals(error.closeCode, null, 'closeCode should be null');
+  assert_equals(error.reason, '', 'reason should be empty');
+}, 'WebSocketError defaults should be correct');
+
+test(() => {
+  const error = new WebSocketError('message', { closeCode: 3456, reason: 'reason' });
+  assert_equals(error.code, 0, 'DOMException code should be 0');
+  assert_equals(error.name, 'WebSocketError', 'name should be correct');
+  assert_equals(error.message, 'message', 'DOMException message should be set');
+  assert_equals(error.closeCode, 3456, 'closeCode should match');
+  assert_equals(error.reason, 'reason', 'reason should match');
+}, 'WebSocketError should be initialised from arguments');
+
+for (const invalidCode of [999, 1001, 2999, 5000]) {
+  test(() => {
+    assert_throws_dom('InvalidAccessError', () => new WebSocketError('', { closeCode: invalidCode }),
+                      'invalid code should throw an InvalidAccessError');
+  }, `new WebSocketError with invalid code ${invalidCode} should throw`);
+}
+
+test(() => {
+  const error = new WebSocketError('', { closeCode: 3333 });
+  assert_equals(error.closeCode, 3333, 'code should be used');
+  assert_equals(error.reason, '', 'reason should be empty');
+}, 'passing only close code to WebSocketError should work');
+
+test(() => {
+  const error = new WebSocketError('', { reason: 'specified' });
+  assert_equals(error.closeCode, 1000, 'code should be defaulted');
+  assert_equals(error.reason, 'specified', 'reason should be used');
+}, 'passing a non-empty reason should cause the close code to be set to 1000');
+
+test(() => {
+  assert_throws_dom('SyntaxError', () => new WebSocketError('', { closeCode: 1000, reason: 'x'.repeat(124) }),
+                    'overlong reason should trigger SyntaxError');
+}, 'overlong reason should throw');
+
+test(() => {
+  assert_throws_dom('SyntaxError', () => new WebSocketError('', { reason: '🔌'.repeat(32) }),
+                    'overlong reason should throw');
+}, 'reason should be rejected based on utf-8 bytes, not character count');