Add PPDProvider barebones implementation and associated cache skeleton.

chromeos/printing/ppd_provider_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 "base/bind.h"
+#include "base/files/file_util.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "chromeos/printing/ppd_cache.h"
+#include "chromeos/printing/ppd_provider.h"
+#include "net/url_request/test_url_request_interceptor.h"
+#include "net/url_request/url_request_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::base::FilePath;
+using ::base::WaitableEvent;
+using ::std::string;
+
+namespace chromeos {
+namespace printing {
+namespace {
+
+const char kTestQuirksServer[] = "bogusserver.bogus.com";
+const char kTestAPIKey[] = "BOGUSAPIKEY";
+const char kTestManufacturer[] = "Bogus Printer Corp";
+const char kTestModel[] = "MegaPrint 9000";
+const char kQuirksResponse[] =
+    "{\n"
+    "  \"compressedPpd\": \"\u000e4manu_a model_1\",\n"
+    "  \"lastUpdatedTime\": \"1\"\n"
+    "}\n";
+
+class PPDProviderTest : public ::testing::Test {
+ public:
+  PPDProviderTest()
+      : loop_(base::MessageLoop::TYPE_IO),
+        request_context_getter_(
+            new ::net::TestURLRequestContextGetter(loop_.task_runner().get())) {
+  }
+
+ protected:
+  ::base::MessageLoop loop_;
+  ::base::RunLoop run_loop_;
+  scoped_refptr<::net::URLRequestContextGetter> request_context_getter_;
+};
+
+// Struct that just captures the callback result for a PPDProvider lookup
+struct CapturedLookupResult {
+  bool initialized = false;
+  PPDProvider::LookupResult result;
+  Printer::PPDFile file;
+};
+
+void CaptureLookupResult(CapturedLookupResult* capture,
+                         PPDProvider::LookupResult result,
+                         Printer::PPDFile file) {
+  capture->initialized = true;
+  capture->result = result;
+  capture->file = file;
+}
+
+TEST_F(PPDProviderTest, hmm) {
+  ::base::ScopedTempDir temp_dir;
+  CHECK(temp_dir.CreateUniqueTempDir());
+  auto cache_options = PPDCache::Options();
+  cache_options.cache_directory = temp_dir.path();
+  auto cache = PPDCache::Create(cache_options);
+  auto provider_options = PPDProvider::Options();
+  provider_options.quirks_server = kTestQuirksServer;
+  provider_options.api_key = kTestAPIKey;
+  auto provider = PPDProvider::Create(request_context_getter_, std::move(cache),
+                                      provider_options);
+  Printer::PPDFile out;
+
+  ::net::TestURLRequestInterceptor interceptor(
+      "https", kTestQuirksServer, ::base::ThreadTaskRunnerHandle::Get(),
+      ::base::ThreadTaskRunnerHandle::Get());
+
+  GURL expected_url(string("https://") + kTestQuirksServer  //
+                    + "/v2/printer/manufacturers/"          //
+                    + kTestManufacturer                     //
+                    + "/models/"                            //
+                    + kTestModel                            //
+                    + "?key="                               //
+                    + kTestAPIKey);
+
+  FilePath contents_path = temp_dir.path().Append("response");
+  string contents = kQuirksResponse;
+  CHECK(base::WriteFile(contents_path, kQuirksResponse,
+                        strlen(kQuirksResponse)) > 0);
+
+  interceptor.SetResponse(expected_url, contents_path);
+
+  CapturedLookupResult captured;
+  provider->Lookup(kTestManufacturer, kTestModel,
+                   ::base::Bind(CaptureLookupResult, &captured));
+  run_loop_.RunUntilIdle();
+  ASSERT_TRUE(captured.initialized);
+  ASSERT_EQ(captured.result, PPDProvider::SUCCESS);
+}
+
+}  // namespace
+}  // namespace printing
+}  // namespace chromeos