Implement a dbus client for CupsTool.

chromeos/dbus/fake_cups_client_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 "chromeos/dbus/fake_cups_client.h"
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+namespace {
+
+const char kPrinterName[] = "the magic printer";
+
+void RecordBooleanResult(bool* called, bool* success, bool result) {
+  if (called == nullptr || success == nullptr)

[hashimoto, 2016/09/07 05:53:17]

Is this null check needed?
If not, please remove it.

[skau, 2016/09/09 15:25:33]

Acknowledged.

+    return;
+
+  *called = true;
+  *success = result;
+}
+
+void ErrorStub(bool* called) {
+  if (!called)

[hashimoto, 2016/09/07 05:53:17]

ditto.

[skau, 2016/09/09 15:25:32]

Acknowledged.

+    return;
+
+  *called = true;
+}
+
+}  // namespace
+
+TEST(FakeCupsClientTest, AddPrinterCallsCallback) {
+  base::MessageLoop message_loop;
+  FakeCupsClient fake_cups;
+
+  bool called = false;
+  bool success;
+  fake_cups.AddPrinter(kPrinterName, "", "", false,
+                       base::Bind(&RecordBooleanResult, &called, &success),
+                       base::Bind(&ErrorStub, nullptr));
+
+  message_loop.RunUntilIdle();
+
+  ASSERT_TRUE(called);
+  EXPECT_TRUE(success);
+}
+
+TEST(FakeCupsClientTest, RemoveMissingPrinterReturnsFalse) {
+  base::MessageLoop message_loop;
+
+  bool called = false;
+  bool success;
+
+  FakeCupsClient fake_cups;
+  fake_cups.RemovePrinter(kPrinterName,
+                          base::Bind(&RecordBooleanResult, &called, &success),
+                          base::Bind(&ErrorStub, nullptr));
+
+  message_loop.RunUntilIdle();
+
+  ASSERT_TRUE(called);
+  EXPECT_FALSE(success);
+}
+
+TEST(FakeCupsClientTest, RemoveExistingPrinterReturnsTrue) {
+  base::MessageLoop message_loop;
+
+  FakeCupsClient fake_cups;
+  fake_cups.AddPrinter(kPrinterName, "", "", false,
+                       base::Bind(&RecordBooleanResult, nullptr, nullptr),
+                       base::Bind(&ErrorStub, nullptr));
+
+  bool called = false;
+  bool success;
+  fake_cups.RemovePrinter(kPrinterName,
+                          base::Bind(&RecordBooleanResult, &called, &success),
+                          base::Bind(&ErrorStub, nullptr));
+
+  message_loop.RunUntilIdle();
+
+  ASSERT_TRUE(called);
+  EXPECT_TRUE(success);
+}
+
+}  // namespace chromeos