chrome/browser/android/webapk/webapk_icon_hasher_unittest.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 "chrome/browser/android/webapk/webapk_icon_hasher.h"

#include <string>

#include "base/bind.h"
#include "base/callback_forward.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/memory/ref_counted.h"
#include "base/path_service.h"
#include "base/run_loop.h"
#include "base/threading/thread_task_runner_handle.h"
#include "content/public/test/test_browser_thread_bundle.h"
#include "net/http/http_util.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/cpp/resource_response.h"
#include "services/network/public/cpp/url_loader_completion_status.h"
#include "services/network/public/mojom/url_loader_factory.mojom.h"
#include "services/network/test/test_url_loader_factory.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"

namespace {

// Murmur2 hash for |icon_url| in Success test.
const char kIconMurmur2Hash[] = "2081059568551351877";

// Runs WebApkIconHasher and blocks till the murmur2 hash is computed.
class WebApkIconHasherRunner {
 public:
  WebApkIconHasherRunner() {}
  ~WebApkIconHasherRunner() {}

  void Run(network::mojom::URLLoaderFactory* url_loader_factory,
           const GURL& icon_url) {
    WebApkIconHasher::DownloadAndComputeMurmur2HashWithTimeout(
        url_loader_factory, icon_url, 300,
        base::Bind(&WebApkIconHasherRunner::OnCompleted,
                   base::Unretained(this)));

    base::RunLoop run_loop;
    on_completed_callback_ = run_loop.QuitClosure();
    run_loop.Run();
  }

  const std::string& murmur2_hash() { return murmur2_hash_; }

 private:
  void OnCompleted(const std::string& murmur2_hash) {
    murmur2_hash_ = murmur2_hash;
    on_completed_callback_.Run();
  }

  // Fake factory that can be primed to return fake data.
  network::TestURLLoaderFactory test_url_loader_factory_;

  // Called once the Murmur2 hash is taken.
  base::Closure on_completed_callback_;

  // Computed Murmur2 hash.
  std::string murmur2_hash_;

  DISALLOW_COPY_AND_ASSIGN(WebApkIconHasherRunner);
};

}  // anonymous namespace

class WebApkIconHasherTest : public ::testing::Test {
 public:
  WebApkIconHasherTest()
      : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {}
  ~WebApkIconHasherTest() override {}

 protected:
  network::TestURLLoaderFactory* test_url_loader_factory() {
    return &test_url_loader_factory_;
  }

 private:
  content::TestBrowserThreadBundle thread_bundle_;
  network::TestURLLoaderFactory test_url_loader_factory_;

  DISALLOW_COPY_AND_ASSIGN(WebApkIconHasherTest);
};

TEST_F(WebApkIconHasherTest, Success) {
  std::string icon_url =
      "http://www.google.com/chrome/test/data/android/google.png";
  base::FilePath source_path;
  base::FilePath icon_path;
  ASSERT_TRUE(base::PathService::Get(base::DIR_SOURCE_ROOT, &source_path));
  icon_path = source_path.AppendASCII("chrome")
                  .AppendASCII("test")
                  .AppendASCII("data")
                  .AppendASCII("android")
                  .AppendASCII("google.png");
  std::string icon_data;
  ASSERT_TRUE(base::ReadFileToString(icon_path, &icon_data));
  test_url_loader_factory()->AddResponse(icon_url, icon_data);

  WebApkIconHasherRunner runner;
  runner.Run(test_url_loader_factory(), GURL(icon_url));
  EXPECT_EQ(kIconMurmur2Hash, runner.murmur2_hash());
}

TEST_F(WebApkIconHasherTest, DataUri) {
  GURL icon_url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA"
      "AAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO"
      "9TXL0Y4OHwAAAABJRU5ErkJggg==");
  WebApkIconHasherRunner runner;
  runner.Run(test_url_loader_factory(), icon_url);
  EXPECT_EQ("536500236142107998", runner.murmur2_hash());
}

TEST_F(WebApkIconHasherTest, DataUriInvalid) {
  GURL icon_url("data:image/png;base64");
  WebApkIconHasherRunner runner;
  runner.Run(test_url_loader_factory(), icon_url);
  EXPECT_EQ("", runner.murmur2_hash());
}

TEST_F(WebApkIconHasherTest, InvalidUrl) {
  GURL icon_url("http::google.com");
  WebApkIconHasherRunner runner;
  runner.Run(test_url_loader_factory(), icon_url);
  EXPECT_EQ("", runner.murmur2_hash());
}

TEST_F(WebApkIconHasherTest, DownloadTimedOut) {
  std::string icon_url = "http://www.google.com/timeout";
  WebApkIconHasherRunner runner;
  runner.Run(test_url_loader_factory(), GURL(icon_url));
  EXPECT_EQ("", runner.murmur2_hash());
}

// Test that the hash callback is called with an empty string if an HTTP error
// prevents the icon URL from being fetched.
TEST_F(WebApkIconHasherTest, HTTPError) {
  std::string icon_url = "http://www.google.com/404";
  network::ResourceResponseHead head;
  std::string headers("HTTP/1.1 404 Not Found\nContent-type: text/html\n\n");
  head.headers = new net::HttpResponseHeaders(
      net::HttpUtil::AssembleRawHeaders(headers.c_str(), headers.size()));
  head.mime_type = "text/html";
  network::URLLoaderCompletionStatus status;
  status.decoded_body_length = 0;
  test_url_loader_factory()->AddResponse(GURL(icon_url), head, "", status);

  WebApkIconHasherRunner runner;
  runner.Run(test_url_loader_factory(), GURL(icon_url));
  EXPECT_EQ("", runner.murmur2_hash());
}