1 files changed, 63 insertions, 0 deletions
diff --git a/testing/web-platform/tests/encoding/streams/encode-bad-chunks.any.js b/testing/web-platform/tests/encoding/streams/encode-bad-chunks.any.js
new file mode 100644
index 0000000000..4a926a67d2
--- /dev/null
+++ b/testing/web-platform/tests/encoding/streams/encode-bad-chunks.any.js
@@ -0,0 +1,63 @@
+// META: global=window,worker
+// META: script=resources/readable-stream-from-array.js
+// META: script=resources/readable-stream-to-array.js
+
+'use strict';
+
+const error1 = new Error('error1');
+error1.name = 'error1';
+
+promise_test(t => {
+  const ts = new TextEncoderStream();
+  const writer = ts.writable.getWriter();
+  const reader = ts.readable.getReader();
+  const writePromise = writer.write({
+    toString() { throw error1; }
+  });
+  const readPromise = reader.read();
+  return Promise.all([
+    promise_rejects_exactly(t, error1, readPromise, 'read should reject with error1'),
+    promise_rejects_exactly(t, error1, writePromise, 'write should reject with error1'),
+    promise_rejects_exactly(t, error1, reader.closed, 'readable should be errored with error1'),
+    promise_rejects_exactly(t, error1, writer.closed, 'writable should be errored with error1'),
+  ]);
+}, 'a chunk that cannot be converted to a string should error the streams');
+
+const oddInputs = [
+  {
+    name: 'undefined',
+    value: undefined,
+    expected: 'undefined'
+  },
+  {
+    name: 'null',
+    value: null,
+    expected: 'null'
+  },
+  {
+    name: 'numeric',
+    value: 3.14,
+    expected: '3.14'
+  },
+  {
+    name: 'object',
+    value: {},
+    expected: '[object Object]'
+  },
+  {
+    name: 'array',
+    value: ['hi'],
+    expected: 'hi'
+  }
+];
+
+for (const input of oddInputs) {
+  promise_test(async () => {
+    const outputReadable = readableStreamFromArray([input.value])
+          .pipeThrough(new TextEncoderStream())
+          .pipeThrough(new TextDecoderStream());
+    const output = await readableStreamToArray(outputReadable);
+    assert_equals(output.length, 1, 'output should contain one chunk');
+    assert_equals(output[0], input.expected, 'output should be correct');
+  }, `input of type ${input.name} should be converted correctly to string`);
+}