Move base to DEPS

base/ios/crb_protocol_observers_unittest.mm

-// 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.
-
-#import "base/ios/crb_protocol_observers.h"
-#include "base/ios/weak_nsobject.h"
-#include "base/logging.h"
-#include "base/mac/scoped_nsautorelease_pool.h"
-#include "base/mac/scoped_nsobject.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "testing/gtest_mac.h"
-#include "testing/platform_test.h"
-
-@protocol TestObserver
-
-@required
-- (void)requiredMethod;
-- (void)reset;
-
-@optional
-- (void)optionalMethod;
-- (void)mutateByAddingObserver:(id<TestObserver>)observer;
-- (void)mutateByRemovingObserver:(id<TestObserver>)observer;
-- (void)nestedMutateByAddingObserver:(id<TestObserver>)observer;
-- (void)nestedMutateByRemovingObserver:(id<TestObserver>)observer;
-
-@end
-
-// Implements only the required methods in the TestObserver protocol.
-@interface TestPartialObserver : NSObject<TestObserver>
-@property(nonatomic, readonly) BOOL requiredMethodInvoked;
-@end
-
-// Implements all the methods in the TestObserver protocol.
-@interface TestCompleteObserver : TestPartialObserver<TestObserver>
-@property(nonatomic, readonly) BOOL optionalMethodInvoked;
-@end
-
-@interface TestMutateObserver : TestCompleteObserver
-- (instancetype)initWithObserver:(CRBProtocolObservers*)observer
-    NS_DESIGNATED_INITIALIZER;
-- (instancetype)init NS_UNAVAILABLE;
-@end
-
-namespace {
-
-class CRBProtocolObserversTest : public PlatformTest {
- public:
-  CRBProtocolObserversTest() {}
-
- protected:
-  void SetUp() override {
-    PlatformTest::SetUp();
-
-    observers_.reset([[CRBProtocolObservers observersWithProtocol:
-        @protocol(TestObserver)] retain]);
-
-    partial_observer_.reset([[TestPartialObserver alloc] init]);
-    EXPECT_FALSE([partial_observer_ requiredMethodInvoked]);
-
-    complete_observer_.reset([[TestCompleteObserver alloc] init]);
-    EXPECT_FALSE([complete_observer_ requiredMethodInvoked]);
-    EXPECT_FALSE([complete_observer_ optionalMethodInvoked]);
-
-    mutate_observer_.reset(
-        [[TestMutateObserver alloc] initWithObserver:observers_.get()]);
-    EXPECT_FALSE([mutate_observer_ requiredMethodInvoked]);
-  }
-
-  base::scoped_nsobject<id> observers_;
-  base::scoped_nsobject<TestPartialObserver> partial_observer_;
-  base::scoped_nsobject<TestCompleteObserver> complete_observer_;
-  base::scoped_nsobject<TestMutateObserver> mutate_observer_;
-};
-
-// Verifies basic functionality of -[CRBProtocolObservers addObserver:] and
-// -[CRBProtocolObservers removeObserver:].
-TEST_F(CRBProtocolObserversTest, AddRemoveObserver) {
-  // Add an observer and verify that the CRBProtocolObservers instance forwards
-  // an invocation to it.
-  [observers_ addObserver:partial_observer_];
-  [observers_ requiredMethod];
-  EXPECT_TRUE([partial_observer_ requiredMethodInvoked]);
-
-  [partial_observer_ reset];
-  EXPECT_FALSE([partial_observer_ requiredMethodInvoked]);
-
-  // Remove the observer and verify that the CRBProtocolObservers instance no
-  // longer forwards an invocation to it.
-  [observers_ removeObserver:partial_observer_];
-  [observers_ requiredMethod];
-  EXPECT_FALSE([partial_observer_ requiredMethodInvoked]);
-}
-
-// Verifies that CRBProtocolObservers correctly forwards the invocation of a
-// required method in the protocol.
-TEST_F(CRBProtocolObserversTest, RequiredMethods) {
-  [observers_ addObserver:partial_observer_];
-  [observers_ addObserver:complete_observer_];
-  [observers_ requiredMethod];
-  EXPECT_TRUE([partial_observer_ requiredMethodInvoked]);
-  EXPECT_TRUE([complete_observer_ requiredMethodInvoked]);
-}
-
-// Verifies that CRBProtocolObservers correctly forwards the invocation of an
-// optional method in the protocol.
-TEST_F(CRBProtocolObserversTest, OptionalMethods) {
-  [observers_ addObserver:partial_observer_];
-  [observers_ addObserver:complete_observer_];
-  [observers_ optionalMethod];
-  EXPECT_FALSE([partial_observer_ requiredMethodInvoked]);
-  EXPECT_FALSE([complete_observer_ requiredMethodInvoked]);
-  EXPECT_TRUE([complete_observer_ optionalMethodInvoked]);
-}
-
-// Verifies that CRBProtocolObservers only holds a weak reference to an
-// observer.
-TEST_F(CRBProtocolObserversTest, WeakReference) {
-  base::WeakNSObject<TestPartialObserver> weak_observer(
-      partial_observer_);
-  EXPECT_TRUE(weak_observer);
-
-  [observers_ addObserver:partial_observer_];
-
-  {
-    // Need an autorelease pool here, because
-    // -[CRBProtocolObservers forwardInvocation:] creates a temporary
-    // autoreleased array that holds all the observers.
-    base::mac::ScopedNSAutoreleasePool pool;
-    [observers_ requiredMethod];
-    EXPECT_TRUE([partial_observer_ requiredMethodInvoked]);
-  }
-
-  partial_observer_.reset();
-  EXPECT_FALSE(weak_observer.get());
-}
-
-// Verifies that an observer can safely remove itself as observer while being
-// notified.
-TEST_F(CRBProtocolObserversTest, SelfMutateObservers) {
-  [observers_ addObserver:mutate_observer_];
-  EXPECT_FALSE([observers_ empty]);
-
-  [observers_ requiredMethod];
-  EXPECT_TRUE([mutate_observer_ requiredMethodInvoked]);
-
-  [mutate_observer_ reset];
-
-  [observers_ nestedMutateByRemovingObserver:mutate_observer_];
-  EXPECT_FALSE([mutate_observer_ requiredMethodInvoked]);
-
-  [observers_ addObserver:partial_observer_];
-
-  [observers_ requiredMethod];
-  EXPECT_FALSE([mutate_observer_ requiredMethodInvoked]);
-  EXPECT_TRUE([partial_observer_ requiredMethodInvoked]);
-
-  [observers_ removeObserver:partial_observer_];
-  EXPECT_TRUE([observers_ empty]);
-}
-
-// Verifies that - [CRBProtocolObservers addObserver:] and
-// - [CRBProtocolObservers removeObserver:] can be called while methods are
-// being forwarded.
-TEST_F(CRBProtocolObserversTest, MutateObservers) {
-  // Indirectly add an observer while forwarding an observer method.
-  [observers_ addObserver:mutate_observer_];
-
-  [observers_ mutateByAddingObserver:partial_observer_];
-  EXPECT_FALSE([partial_observer_ requiredMethodInvoked]);
-
-  // Check that methods are correctly forwared to the indirectly added observer.
-  [mutate_observer_ reset];
-  [observers_ requiredMethod];
-  EXPECT_TRUE([mutate_observer_ requiredMethodInvoked]);
-  EXPECT_TRUE([partial_observer_ requiredMethodInvoked]);
-
-  [mutate_observer_ reset];
-  [partial_observer_ reset];
-
-  // Indirectly remove an observer while forwarding an observer method.
-  [observers_ mutateByRemovingObserver:partial_observer_];
-
-  // Check that method is not forwared to the indirectly removed observer.
-  [observers_ requiredMethod];
-  EXPECT_TRUE([mutate_observer_ requiredMethodInvoked]);
-  EXPECT_FALSE([partial_observer_ requiredMethodInvoked]);
-}
-
-// Verifies that - [CRBProtocolObservers addObserver:] and
-// - [CRBProtocolObservers removeObserver:] can be called while methods are
-// being forwarded with a nested invocation depth > 0.
-TEST_F(CRBProtocolObserversTest, NestedMutateObservers) {
-  // Indirectly add an observer while forwarding an observer method.
-  [observers_ addObserver:mutate_observer_];
-
-  [observers_ nestedMutateByAddingObserver:partial_observer_];
-  EXPECT_FALSE([partial_observer_ requiredMethodInvoked]);
-
-  // Check that methods are correctly forwared to the indirectly added observer.
-  [mutate_observer_ reset];
-  [observers_ requiredMethod];
-  EXPECT_TRUE([mutate_observer_ requiredMethodInvoked]);
-  EXPECT_TRUE([partial_observer_ requiredMethodInvoked]);
-
-  [mutate_observer_ reset];
-  [partial_observer_ reset];
-
-  // Indirectly remove an observer while forwarding an observer method.
-  [observers_ nestedMutateByRemovingObserver:partial_observer_];
-
-  // Check that method is not forwared to the indirectly removed observer.
-  [observers_ requiredMethod];
-  EXPECT_TRUE([mutate_observer_ requiredMethodInvoked]);
-  EXPECT_FALSE([partial_observer_ requiredMethodInvoked]);
-}
-
-}  // namespace
-
-@implementation TestPartialObserver {
-  BOOL _requiredMethodInvoked;
-}
-
-- (BOOL)requiredMethodInvoked {
-  return _requiredMethodInvoked;
-}
-
-- (void)requiredMethod {
-  _requiredMethodInvoked = YES;
-}
-
-- (void)reset {
-  _requiredMethodInvoked = NO;
-}
-
-@end
-
-@implementation TestCompleteObserver {
-  BOOL _optionalMethodInvoked;
-}
-
-- (BOOL)optionalMethodInvoked {
-  return _optionalMethodInvoked;
-}
-
-- (void)optionalMethod {
-  _optionalMethodInvoked = YES;
-}
-
-- (void)reset {
-  [super reset];
-  _optionalMethodInvoked = NO;
-}
-
-@end
-
-@implementation TestMutateObserver {
-  __weak id _observers;
-}
-
-- (instancetype)initWithObserver:(CRBProtocolObservers*)observers {
-  self = [super init];
-  if (self) {
-    _observers = observers;
-  }
-  return self;
-}
-
-- (instancetype)init {
-  NOTREACHED();
-  return nil;
-}
-
-- (void)mutateByAddingObserver:(id<TestObserver>)observer {
-  [_observers addObserver:observer];
-}
-
-- (void)mutateByRemovingObserver:(id<TestObserver>)observer {
-  [_observers removeObserver:observer];
-}
-
-- (void)nestedMutateByAddingObserver:(id<TestObserver>)observer {
-  [_observers mutateByAddingObserver:observer];
-}
-
-- (void)nestedMutateByRemovingObserver:(id<TestObserver>)observer {
-  [_observers mutateByRemovingObserver:observer];
-}
-
-@end