fix(op_crates/web): TextEncoder should throw RangeError (#8039)

This commit changes error type thrown by TextEncoder, when
provided encoding is not supported matching Chromium behavior.

1 files changed, 11 insertions, 0 deletions

diff --git a/cli/tests/unit/text_encoding_test.ts b/cli/tests/unit/text_encoding_test.ts
index 23799fba3..6a9274d02 100644
--- a/cli/tests/unit/text_encoding_test.ts
+++ b/cli/tests/unit/text_encoding_test.ts
@@ -112,6 +112,17 @@ unitTest(function textDecoderErrorEncoding(): void {
   assert(didThrow);
 });
 
+unitTest(function textDecoderHandlesNotFoundInternalDecoder() {
+  let didThrow = false;
+  try {
+    new TextDecoder("gbk");
+  } catch (e) {
+    didThrow = true;
+    assert(e instanceof RangeError);
+  }
+  assert(didThrow);
+});
+
 unitTest(function textEncoder(): void {
   const fixture = "𝓽𝓮𝔁𝓽";
   const encoder = new TextEncoder();