Implement a JavaScript API for document scanning

chrome/browser/extensions/api/document_scan/document_scan_interface_chromeos_unittest.cc

+// 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 "chrome/browser/extensions/api/document_scan/document_scan_interface_chromeos.h"
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/test/test_simple_task_runner.h"
+#include "base/thread_task_runner_handle.h"
+#include "chromeos/dbus/mock_lorgnette_manager_client.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/cros_system_api/dbus/service_constants.h"
+
+using std::string;
+using std::vector;
+using testing::_;
+
+namespace extensions {
+
+namespace api {
+
+// Tests of networking_private_crypto support for Networking Private API.
+class DocumentScanInterfaceChromeosTest : public testing::Test {
+ public:
+  DocumentScanInterfaceChromeosTest()
+      : client_(new chromeos::MockLorgnetteManagerClient()) {}
+  virtual ~DocumentScanInterfaceChromeosTest() {}
+
+  void SetUp() {
+    // This is needed to create a valid PipeReader object.
+    task_runner_ = new base::TestSimpleTaskRunner();
+    thread_task_runner_handle_.reset(
+        new base::ThreadTaskRunnerHandle(task_runner_));
+    scan_interface_.lorgnette_manager_client_ = client_.get();
+  }
+
+  virtual void TearDown() override {
+    thread_task_runner_handle_.reset();
+    task_runner_ = NULL;
+  }
+
+  MOCK_METHOD2(
+      OnListScannersResultReceived,
+      void(const vector<DocumentScanInterface::ScannerDescription>& scanners,
+           const string& error));
+
+  MOCK_METHOD3(OnScanCompleted, void(const string& scanned_image,
+                                     const string& mime_type,
+                                     const string& error));
+
+  chromeos::PipeReader *GetPipeReader() {
+    return scan_interface_.pipe_reader_.get();
+  }
+
+ protected:
+  DocumentScanInterfaceChromeos scan_interface_;
+  scoped_ptr<chromeos::MockLorgnetteManagerClient> client_;
+  scoped_refptr<base::TestSimpleTaskRunner> task_runner_;
+  scoped_ptr<base::ThreadTaskRunnerHandle> thread_task_runner_handle_;
+};
+
+ACTION_P2(InvokeListScannersCallback, scanner_list, error) {
+  ::std::tr1::get<0>(args).Run(scanner_list, error);
+}
+
+ACTION_P2(InvokePipeReader, test, data) {
+  test->GetPipeReader()->AcceptData(data.c_str(), data.size());
+}
+
+ACTION_P(InvokeScanCallback, succeeded) {
+  ::std::tr1::get<3>(args).Run(succeeded);
+}
+
+MATCHER_P5(IsScannerDescription, name, manufacturer, model, type, mime, "") {
+  return
+      arg.name == name &&
+      arg.manufacturer == manufacturer &&
+      arg.model == model &&
+      arg.scanner_type == type &&
+      arg.image_mime_type == mime;
+}
+
+MATCHER_P2(IsScannerProperties, mode, resolution, "") {
+  return arg.mode == mode && arg.resolution_dpi == resolution;
+}
+
+TEST_F(DocumentScanInterfaceChromeosTest, ListScanners) {
+  chromeos::LorgnetteManagerClient::ScannerTable scanners;
+  const char kScannerName[] = "Monet";
+  chromeos::LorgnetteManagerClient::ScannerTableEntry entry;
+  const char kScannerManufacturer[] = "Jacques-Louis David";
+  entry[lorgnette::kScannerPropertyManufacturer] = kScannerManufacturer;
+  const char kScannerModel[] = "Le Havre";
+  entry[lorgnette::kScannerPropertyModel] = kScannerModel;
+  const char kScannerType[] = "Impressionism";
+  entry[lorgnette::kScannerPropertyType] = kScannerType;
+  scanners[kScannerName] = entry;
+  EXPECT_CALL(*client_, ListScanners(_))
+      .WillOnce(InvokeListScannersCallback(true, scanners));
+  EXPECT_CALL(*this, OnListScannersResultReceived(
+                         testing::ElementsAre(
+                             IsScannerDescription(kScannerName,
+                                                  kScannerManufacturer,
+                                                  kScannerModel,
+                                                  kScannerType,
+                                                  "image/png")), ""));
+  scan_interface_.ListScanners(base::Bind(
+      &DocumentScanInterfaceChromeosTest::OnListScannersResultReceived,
+      base::Unretained(this)));
+}
+
+TEST_F(DocumentScanInterfaceChromeosTest, ScanFailure) {
+  const char kScannerName[] = "Monet";
+  const int kResolution = 4096;
+  EXPECT_TRUE(base::ThreadTaskRunnerHandle::IsSet());
+  EXPECT_CALL(*client_, ScanImage(
+                            kScannerName,
+                            _,
+                            IsScannerProperties(
+                                lorgnette::kScanPropertyModeColor,
+                                kResolution),
+                            _)).WillOnce(InvokeScanCallback(false));
+  EXPECT_CALL(*this, OnScanCompleted("data:image/png;base64,",
+                                     "image/png",
+                                     "Image scan failed"));
+  scan_interface_.Scan(
+      kScannerName,
+      DocumentScanInterface::kScanModeColor,
+      kResolution,
+      base::Bind(
+        &DocumentScanInterfaceChromeosTest::OnScanCompleted,
+        base::Unretained(this)));
+}
+
+TEST_F(DocumentScanInterfaceChromeosTest, ScanSuccess) {
+  const char kScannerName[] = "Monet";
+  const int kResolution = 4096;
+  EXPECT_TRUE(base::ThreadTaskRunnerHandle::IsSet());
+  EXPECT_CALL(*client_,
+              ScanImage(
+                  kScannerName,
+                  _,
+                  IsScannerProperties(
+                      lorgnette::kScanPropertyModeColor,
+                      kResolution),
+                  _))
+      .WillOnce(testing::DoAll(
+          InvokePipeReader(this, string("PrettyPicture")),
+          InvokeScanCallback(true)));
+
+  // Data URL plus base64 representation of "PrettyPicture".
+  const char kExpectedImageData[] =
+      "data:image/png;base64,UHJldHR5UGljdHVyZQ==";
+
+  EXPECT_CALL(*this, OnScanCompleted(kExpectedImageData, "image/png", ""));
+  scan_interface_.Scan(
+      kScannerName,
+      DocumentScanInterface::kScanModeColor,
+      kResolution,
+      base::Bind(
+        &DocumentScanInterfaceChromeosTest::OnScanCompleted,
+        base::Unretained(this)));
+}
+
+}  // namespace api
+
+}  // namespace extensions