Introduce web::TestWebThread class

Introduce web::TestWebThread that delegate to content::BrowserThread so that
ios/web has content free public API to write tests that uses web::WebThread.

BUG=442292

Review URL: https://codereview.chromium.org/803163002

Cr-Commit-Position: refs/heads/master@{#308575}

1 files changed, 65 insertions, 0 deletions

diff --git a/ios/web/test/test_web_thread.cc b/ios/web/test/test_web_thread.cc
new file mode 100644
index 0000000..6318e71
--- /dev/null
+++ b/ios/web/test/test_web_thread.cc
@@ -0,0 +1,65 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ios/web/public/test/test_web_thread.h"
+
+#include "content/public/test/test_browser_thread.h"
+#include "ios/web/web_thread_impl.h"
+
+namespace web {
+
+// TestWebThreadImpl delegates to content::TestBrowserThread until WebThread
+// implementation is indenpendent of content::BrowserThread.
+class TestWebThreadImpl {
+ public:
+  TestWebThreadImpl(WebThread::ID identifier)
+      : test_browser_thread_(BrowserThreadIDFromWebThreadID(identifier)) {}
+
+  TestWebThreadImpl(WebThread::ID identifier, base::MessageLoop* message_loop)
+      : test_browser_thread_(BrowserThreadIDFromWebThreadID(identifier),
+                             message_loop) {}
+
+  ~TestWebThreadImpl() { Stop(); }
+
+  bool Start() { return test_browser_thread_.Start(); }
+
+  bool StartIOThread() { return test_browser_thread_.StartIOThread(); }
+
+  void Stop() { test_browser_thread_.Stop(); }
+
+  bool IsRunning() { return test_browser_thread_.IsRunning(); }
+
+ private:
+  content::TestBrowserThread test_browser_thread_;
+};
+
+TestWebThread::TestWebThread(WebThread::ID identifier)
+    : impl_(new TestWebThreadImpl(identifier)) {
+}
+
+TestWebThread::TestWebThread(WebThread::ID identifier,
+                             base::MessageLoop* message_loop)
+    : impl_(new TestWebThreadImpl(identifier, message_loop)) {
+}
+
+TestWebThread::~TestWebThread() {
+}
+
+bool TestWebThread::Start() {
+  return impl_->Start();
+}
+
+bool TestWebThread::StartIOThread() {
+  return impl_->StartIOThread();
+}
+
+void TestWebThread::Stop() {
+  impl_->Stop();
+}
+
+bool TestWebThread::IsRunning() {
+  return impl_->IsRunning();
+}
+
+}  // namespace web