Response construction with a ReadableStream

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/response-stream-construction.js

+// This file contains tests for Response construction with a readable stream.
+// Move these tests to response.js once the feature gets stable.
+
+if (self.importScripts) {
+  importScripts('../resources/fetch-test-helpers.js');
+}
+
+function read_until_end(reader) {

[domenic, 2015/12/09 13:03:18]

You could probably reuse the helper from rs-utils.js if you want.

[yhirano, 2015/12/10 10:51:05]

Done.

+  var chunks = [];
+  function consume() {
+    return reader.read().then(function(r) {
+        if (r.done) {
+          return chunks;
+        } else {
+          chunks.push(r.value);
+          return consume();
+        }
+      });
+  }
+  return consume();
+}
+
+test(() => {
+    var controller;
+    var stream = new ReadableStream({start: c => controller = c});
+
+    var response = new Response(stream);
+    // TODO(yhirano): This should be assert_equals.
+    assert_not_equals(response.body, stream);
+  }, 'Response constructed with a stream');
+
+promise_test(() => {
+    var controller;
+    var stream = new ReadableStream({start: c => controller = c});
+    controller.enqueue(new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0x6f]));
+    controller.enqueue(new Uint8Array([0x77, 0x6f, 0x72, 0x6c, 0x64]));
+    controller.close();
+    assert_false(stream.locked);
+    var response = new Response(stream);
+    return response.text().then(t => {
+        assert_equals(t, 'helloworld');
+      });
+    assert_true(stream.locked);

[domenic, 2015/12/09 13:03:18]

Unreachable code

[yhirano, 2015/12/10 10:51:05]

Nice catch! Fixed.

+  }, 'Response constructed with a stream');
+
+promise_test(() => {
+    var controller;
+    var stream = new ReadableStream({start: c => controller = c});
+    controller.enqueue(new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0x6f]));
+    controller.enqueue(new Uint8Array([0x77, 0x6f, 0x72, 0x6c, 0x64]));
+    controller.close();
+
+    var response = new Response(stream);
+    return read_until_end(response.body.getReader()).then(chunks => {
+        var decoder = new TextDecoder('utf-8');
+        var r = '';
+        for (var chunk of chunks) {
+          r += decoder.decode(chunk, {stream: true});
+        }
+        r += decoder.decode();
+        assert_equals(r, 'helloworld');
+      });
+  }, 'Response constructed with a stream / Read from body stream');
+
+promise_test(t => {
+    var controller;
+    var stream = new ReadableStream({start: c => controller = c});
+    setTimeout(() => {
+        controller.enqueue(new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0x6f]));
+        controller.enqueue(new Uint8Array([0x77, 0x6f, 0x72, 0x6c, 0x64]));
+        controller.error();
+    }, 1);
+    var response = new Response(stream);
+    return response.text().then(unreached_fulfillment(t), e => {
+        assert_equals(e.name, 'TypeError');
+      });
+  }, 'Response constructed with an errored stream');
+
+promise_test(t => {
+    var controller;
+    var stream = new ReadableStream({start: c => controller = c});
+    stream.getReader();
+    var response = new Response(stream);
+    return response.text().then(unreached_fulfillment(t), e => {

[domenic, 2015/12/09 13:03:18]

You can use promise_rejects for these types of tests

[yhirano, 2015/12/10 10:51:05]

Done.

+        assert_equals(e.name, 'TypeError');
+      });
+  }, 'Response constructed with a locked stream');
+
+promise_test(t => {
+    var controller;
+    var stream = new ReadableStream({start: c => controller = c});
+    setTimeout(() => controller.enqueue(), 1);
+    var response = new Response(stream);
+    return response.text().then(unreached_fulfillment(t), e => {
+        assert_equals(e.name, 'TypeError');
+      });
+  }, 'Response constructed stream with an undefined chunk');
+
+promise_test(t => {
+    var controller;
+    var stream = new ReadableStream({start: c => controller = c});
+    setTimeout(() => controller.enqueue(null), 1);
+    var response = new Response(stream);
+    return response.text().then(unreached_fulfillment(t), e => {
+        assert_equals(e.name, 'TypeError');
+      });
+  }, 'Response constructed stream with a null chunk');
+
+promise_test(t => {
+    var controller;
+    var stream = new ReadableStream({start: c => controller = c});
+    setTimeout(() => controller.enqueue('hello'), 1);
+    var response = new Response(stream);
+    return response.text().then(unreached_fulfillment(t), e => {
+        assert_equals(e.name, 'TypeError');
+      });
+  }, 'Response constructed stream with a string chunk');
+