Consolidate EulaAcceptedNotifier implementations.

chrome/browser/metrics/variations/eula_accepted_notifier_unittest.cc

+// Copyright 2013 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/metrics/variations/eula_accepted_notifier.h"
+
+#include "base/prefs/pref_registry_simple.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/test/base/scoped_testing_local_state.h"
+#include "chrome/test/base/testing_browser_process.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class EulaAcceptedNotifierTest : public testing::Test,
+                                 public EulaAcceptedNotifier::Observer {
+ public:
+  EulaAcceptedNotifierTest() : eula_accepted_called_(false) {
+  }
+

[SteveT, 2013/05/31 12:20:08]

Optional nit: Mind adding a comment here?

// testing::Test overrides.

[Alexei Svitkine (slow), 2013/05/31 15:25:17]

Done.

+  virtual void SetUp() OVERRIDE {
+    local_state_.registry()->RegisterBooleanPref(prefs::kEulaAccepted, false);
+    notifier_.reset(new EulaAcceptedNotifier(&local_state_));
+    notifier_->Init(this);
+  }
+

[SteveT, 2013/05/31 12:20:08]

Optional nit: Mind adding a comment here?

// EulaAcceptedNotifier::Observer overrides.

[Alexei Svitkine (slow), 2013/05/31 15:25:17]

Done.

+  virtual void OnEulaAccepted() OVERRIDE {
+    EXPECT_FALSE(eula_accepted_called_);
+    eula_accepted_called_ = true;
+  }
+
+  void SetEulaAcceptedPref() {
+    local_state_.SetBoolean(prefs::kEulaAccepted, true);
+  }
+
+  EulaAcceptedNotifier* notifier() {
+    return notifier_.get();
+  }
+
+  bool eula_accepted_called() {
+    return eula_accepted_called_;
+  }
+
+ private:
+  TestingPrefServiceSimple local_state_;
+  scoped_ptr<EulaAcceptedNotifier> notifier_;
+  bool eula_accepted_called_;
+
+  DISALLOW_COPY_AND_ASSIGN(EulaAcceptedNotifierTest);
+};
+
+TEST_F(EulaAcceptedNotifierTest, EulaAlreadyAccepted) {
+  SetEulaAcceptedPref();
+  EXPECT_TRUE(notifier()->IsEulaAccepted());
+  EXPECT_FALSE(eula_accepted_called());
+  // Call it a second time, to ensure the answer doesn't change.
+  EXPECT_TRUE(notifier()->IsEulaAccepted());
+  EXPECT_FALSE(eula_accepted_called());
+}
+
+TEST_F(EulaAcceptedNotifierTest, EulaNotAccepted) {
+  EXPECT_FALSE(notifier()->IsEulaAccepted());
+  EXPECT_FALSE(eula_accepted_called());
+  // Call it a second time, to ensure the answer doesn't change.
+  EXPECT_FALSE(notifier()->IsEulaAccepted());
+  EXPECT_FALSE(eula_accepted_called());
+}
+
+TEST_F(EulaAcceptedNotifierTest, EulaNotInitiallyAccepted) {
+  EXPECT_FALSE(notifier()->IsEulaAccepted());
+  SetEulaAcceptedPref();
+  EXPECT_TRUE(eula_accepted_called());
+  EXPECT_TRUE(notifier()->IsEulaAccepted());

[SteveT, 2013/05/31 12:20:08]

Would it be more consistent to check notifier()->IsEulaAccepted() first, like in
the two tests above?

[Alexei Svitkine (slow), 2013/05/31 15:25:17]

Done.

+  // Call it a second time, to ensure the answer doesn't change.
+  EXPECT_TRUE(notifier()->IsEulaAccepted());

[SteveT, 2013/05/31 12:20:08]

Is it worth checking eula_accepted_called() here? Make sure that answer doesn't
change, either?

[Alexei Svitkine (slow), 2013/05/31 15:25:17]

Once TRUE, it shouldn't change. There's a check for this in OnEulaAccepted()
above.

+}