Add a test Unzip service to simulate crashers

Adding a test Unzip service that disconnects when accessed to simulate
crashers. It will be used in a follow up CL to ensure extension
installation deals correctly with the unzip service crashing.

Bug: 799220
Change-Id: I511b591e5740ac4c0e64f63d7b28cd32173a4990
Reviewed-on: https://chromium-review.googlesource.com/955930Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Jay Civelli <jcivelli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542136}

components/unzip_service/public/cpp/BUILD.gn

@@ -16,3 +16,18 @@ source_set("cpp") {
     "//services/service_manager/public/cpp",
   ]
 }
+
+static_library("test_support") {
+  testonly = true
+  sources = [
+    "test_unzip_service.cc",
+    "test_unzip_service.h",
+  ]
+
+  deps = [
+    ":cpp",
+    "//base",
+    "//components/unzip_service:lib",
+    "//services/service_manager/public/cpp/test:test_support",
+  ]
+}

components/unzip_service/public/cpp/test_unzip_service.cc

+// Copyright 2018 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 "components/unzip_service/public/cpp/test_unzip_service.h"
+
+namespace unzip {
+
+CrashyUnzipService::CrashyUnzipService() = default;
+
+CrashyUnzipService::~CrashyUnzipService() = default;
+
+// service_manager::Service implmentation:
+void CrashyUnzipService::OnStart() {}
+
+void CrashyUnzipService::OnBindInterface(
+    const service_manager::BindSourceInfo& source_info,
+    const std::string& interface_name,
+    mojo::ScopedMessagePipeHandle interface_pipe) {
+  DCHECK(interface_name == mojom::Unzipper::Name_);
+  DCHECK(!unzipper_binding_);
+  unzipper_binding_ = std::make_unique<mojo::Binding<mojom::Unzipper>>(
+      this, mojom::UnzipperRequest(std::move(interface_pipe)));
+}
+
+// unzip::mojom::Unzipper:
+void CrashyUnzipService::Unzip(base::File zip_file,
+                               filesystem::mojom::DirectoryPtr output_dir,
+                               UnzipCallback callback) {
+  unzipper_binding_.reset();
+}
+
+void CrashyUnzipService::UnzipWithFilter(
+    base::File zip_file,
+    filesystem::mojom::DirectoryPtr output_dir,
+    mojom::UnzipFilterPtr filter,
+    UnzipWithFilterCallback callback) {
+  unzipper_binding_.reset();
+}
+
+}  // namespace unzip

components/unzip_service/public/cpp/test_unzip_service.h

+// Copyright 2018 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.
+
+#ifndef COMPONENTS_UNZIP_SERVICE_PUBLIC_CPP_TEST_UNZIP_SERVICE_H_
+#define COMPONENTS_UNZIP_SERVICE_PUBLIC_CPP_TEST_UNZIP_SERVICE_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "components/unzip_service/public/interfaces/unzipper.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/service_manager/public/cpp/service.h"
+
+namespace unzip {
+
+// An implementation of the UnzipService that closes the connection when
+// a call is made on the Unzipper interface.
+// Can be used with a TestConnectorFactory to simulate crashes in the service
+// while processing a call.
+class CrashyUnzipService : public service_manager::Service,
+                           public mojom::Unzipper {
+ public:
+  CrashyUnzipService();
+  ~CrashyUnzipService() override;
+
+  // service_manager::Service:
+  void OnStart() override;
+  void OnBindInterface(const service_manager::BindSourceInfo& source_info,
+                       const std::string& interface_name,
+                       mojo::ScopedMessagePipeHandle interface_pipe) override;
+
+  // unzip::mojom::Unzipper:
+  void Unzip(base::File zip_file,
+             filesystem::mojom::DirectoryPtr output_dir,
+             UnzipCallback callback) override;
+  void UnzipWithFilter(base::File zip_file,
+                       filesystem::mojom::DirectoryPtr output_dir,
+                       mojom::UnzipFilterPtr filter,
+                       UnzipWithFilterCallback callback) override;
+
+ private:
+  std::unique_ptr<mojo::Binding<mojom::Unzipper>> unzipper_binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(CrashyUnzipService);
+};
+
+}  // namespace unzip
+
+#endif  // COMPONENTS_UNZIP_SERVICE_PUBLIC_CPP_TEST_UNZIP_SERVICE_H_