Update web-platform-tests to revision 7c50c216081d6ea3c9afe553ee7b64534020a1b2

tests/wpt/web-platform-tests/encoding/streams/decode-attributes.any.js

@@ -0,0 +1,71 @@
+// META: global=worker
+
+'use strict';
+
+// Verify that constructor arguments are correctly reflected in the attributes.
+
+// Mapping of the first argument to TextDecoderStream to the expected value of
+// the encoding attribute. We assume that if this subset works correctly, the
+// rest probably work too.
+const labelToName = {
+  'unicode-1-1-utf-8': 'utf-8',
+  'iso-8859-2': 'iso-8859-2',
+  'ascii': 'windows-1252',
+  'utf-16': 'utf-16le'
+};
+
+for (const label of Object.keys(labelToName)) {
+  test(() => {
+    const stream = new TextDecoderStream(label);
+    assert_equals(stream.encoding, labelToName[label], 'encoding should match');
+  }, `encoding attribute should have correct value for '${label}'`);
+}
+
+for (const falseValue of [false, 0, '', undefined, null]) {
+  test(() => {
+    const stream = new TextDecoderStream('utf-8', { fatal: falseValue });
+    assert_false(stream.fatal, 'fatal should be false');
+  }, `setting fatal to '${falseValue}' should set the attribute to false`);
+
+  test(() => {
+    const stream = new TextDecoderStream('utf-8', { ignoreBOM: falseValue });
+    assert_false(stream.ignoreBOM, 'ignoreBOM should be false');
+  }, `setting ignoreBOM to '${falseValue}' should set the attribute to false`);
+}
+
+for (const trueValue of [true, 1, {}, [], 'yes']) {
+  test(() => {
+    const stream = new TextDecoderStream('utf-8', { fatal: trueValue });
+    assert_true(stream.fatal, 'fatal should be true');
+  }, `setting fatal to '${trueValue}' should set the attribute to true`);
+
+  test(() => {
+    const stream = new TextDecoderStream('utf-8', { ignoreBOM: trueValue });
+    assert_true(stream.ignoreBOM, 'ignoreBOM should be true');
+  }, `setting ignoreBOM to '${trueValue}' should set the attribute to true`);
+}
+
+test(() => {
+  assert_throws(new RangeError(), () => new TextDecoderStream(''),
+                'the constructor should throw');
+}, 'constructing with an invalid encoding should throw');
+
+test(() => {
+  assert_throws(new TypeError(), () => new TextDecoderStream({
+    toString() { return {}; }
+  }), 'the constructor should throw');
+}, 'constructing with a non-stringifiable encoding should throw');
+
+test(() => {
+  assert_throws(new Error(),
+                () => new TextDecoderStream('utf-8', {
+                  get fatal() { throw new Error(); }
+                }), 'the constructor should throw');
+}, 'a throwing fatal member should cause the constructor to throw');
+
+test(() => {
+  assert_throws(new Error(),
+                () => new TextDecoderStream('utf-8', {
+                  get ignoreBOM() { throw new Error(); }
+                }), 'the constructor should throw');
+}, 'a throwing ignoreBOM member should cause the constructor to throw');