Converts resource_provider apptests to unit tests

components/resource_provider/resource_provider_test_app.cc

+// Copyright 2016 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 <stddef.h>
+#include <stdint.h>
+
+#include "base/files/file.h"
+#include "base/macros.h"
+#include "base/run_loop.h"
+#include "components/resource_provider/public/cpp/resource_loader.h"
+#include "components/resource_provider/public/interfaces/resource_provider.mojom.h"
+#include "components/resource_provider/test.mojom.h"
+#include "mojo/platform_handle/platform_handle_functions.h"
+#include "mojo/public/c/system/main.h"
+#include "mojo/public/cpp/bindings/array.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+#include "mojo/shell/public/cpp/application_runner.h"
+#include "mojo/shell/public/cpp/shell_client.h"
+
+namespace resource_provider {
+namespace test {
+
+std::string ReadFile(base::File* file) {
+  const size_t kBufferSize = 1 << 16;
+  scoped_ptr<char[]> buffer(new char[kBufferSize]);
+  const int read = file->ReadAtCurrentPos(buffer.get(), kBufferSize);
+  if (read == -1)
+    return std::string();
+  return std::string(buffer.get(), read);
+}
+
+std::set<std::string> SetWithString(const std::string& contents) {
+  std::set<std::string> result;
+  result.insert(contents);
+  return result;
+}
+
+std::set<std::string> SetWithStrings(const std::string& contents1,
+                                     const std::string& contents2) {
+  std::set<std::string> result;
+  result.insert(contents1);
+  result.insert(contents2);
+  return result;
+}
+
+class Test : public mojom::Test {
+ public:
+  explicit Test(mojo::Connector* connector) : connector_(connector) {}
+  ~Test() override {}
+
+  // mojom::Test:
+  void GetResource1(const GetResource1Callback& callback) override {
+    printf("GetResource1\n");
+    ResourceContentsMap results(GetResources(SetWithString("sample")));
+    printf("GetResource1 result %s\n", results["sample"].c_str());
+    callback.Run(results["sample"]);
+  }
+  void GetBothResources(const GetBothResourcesCallback& callback) override {
+    ResourceContentsMap results(
+        GetResources(SetWithStrings("sample", "dir/sample2")));
+    callback.Run(results["sample"], results["dir/sample2"]);
+  }
+
+ private:
+  using ResourceContentsMap = std::map<std::string, std::string>;
+
+  ResourceContentsMap GetResources(const std::set<std::string>& paths) {
+    ResourceLoader loader(connector_, paths);
+    loader.BlockUntilLoaded();
+
+    // Load the contents of each of the handles.
+    ResourceContentsMap results;
+    for (auto& path : paths) {
+      base::File file(loader.ReleaseFile(path));
+      results[path] = ReadFile(&file);
+    }
+    return results;
+  }
+
+  mojo::Connector* connector_;
+
+  DISALLOW_COPY_AND_ASSIGN(Test);
+};
+
+class TestApp : public mojo::ShellClient,
+                public mojo::InterfaceFactory<mojom::Test> {
+ public:
+  TestApp() {}
+  ~TestApp() override {}
+
+  // mojo::ShellClient:
+  void Initialize(mojo::Connector* connector,
+                  const mojo::Identity& identity,
+                  uint32_t id) override {
+    test_.reset(new Test(connector));
+  }
+  bool AcceptConnection(mojo::Connection* connection) override {
+    connection->AddInterface<mojom::Test>(this);
+    return true;
+  }
+  void ShellConnectionLost() override {
+    base::MessageLoop::current()->QuitWhenIdle();
+  }
+
+  // InterfaceFactory<mojom::Test>:
+  void Create(mojo::Connection* connection,
+              mojom::TestRequest request) override {
+    printf("test app create\n");
+    bindings_.AddBinding(test_.get(), std::move(request));
+  }
+
+ private:
+  scoped_ptr<Test> test_;
+  mojo::BindingSet<test::mojom::Test> bindings_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestApp);
+};
+
+}  // namespace test
+}  // namespace resource_provider
+
+MojoResult MojoMain(MojoHandle shell_handle) {
+  return mojo::ApplicationRunner(new resource_provider::test::TestApp)
+      .Run(shell_handle);
+}